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GE H

EALTHCARE

IRECTION

5158821-100, R

EVISION

PLORE

OCUS

SP S

ERVICE

UIDE

Page 265

TOPIC 7.5.2 PERFORM VERIFICATION SCANS FOR 2X2 MODE:

Resolution value

Target value in pixels

(

025/R)=

Maximum value (Target value + 2)

Mean value of plastic

(WIRE # 2)

Value at top of peak

Full Width Half Maximum Value

(M+T)/2=

Line length in pixels

Resolution value

Target value in pixels

(

025/R)=

Maximum value (Target value + 2)

Mean value of plastic

(WIRE # 3)

Value at top of peak

Full Width Half Maximum Value

(M+T)/2=

Line length in pixels

Resolution value

Target value in pixels

(

025/R)=

Maximum value (Target value + 2)

Mean value of plastic

(WIRE # 4)

Value at top of peak

Full Width Half Maximum Value

(M+T)/2=

Line length in pixels

Resolution value

Target value in pixels

(

025/R)=

Maximum value (Target value + 2)

FIND THE IDEAL CENTER OF ROTATION AT THE CENTRAL SLICE

Parameter Description

Parameter Value

Line angle

ABRIDGED CALIBRATION WORKSHEET

Содержание Healthcare eXplore Locus SP

Страница 2: ...This page is intentionally left blank...

Страница 3: ...re procedure Addition of Acquisition Computer Replacement procedures Dell to HP Major changes to Preventive Maintenance chapter Sept 26 07 3 Minor changes to calibration procedures Remove lexan collim...

Страница 4: ...GE HEALTHCARE DIRECTION 5158821 100 REVISION 3 EXPLORE LOCUS SP SERVICE GUIDE Page 4 This page is intentionally left blank...

Страница 5: ...Live Animal Handling Prohibition 17 1 3 Publication Conventions 17 1 3 1 General Paragraph and Character Styles 17 1 3 2 General Installation Safety Measures 18 1 3 3 Omissions Errors Suggested Impro...

Страница 6: ...2 5 Scan Manager 35 3 2 6 Fluoroscopy 36 3 2 7 eXplore Locus SP Electrical Block Diagram 36 4 Functional Checks 4 1 Overview 39 4 1 1 Purpose 39 4 2 Perform Functional Checks 39 4 2 1 X Ray Source 39...

Страница 7: ...r and Hose Removal Replacement 62 6 2 2 Right Comair Fan Removal Replacement 64 6 2 3 Left Comair Fan Removal Replacement 66 6 2 4 Interlock Removal Replacement 67 6 2 5 X Ray Indicator Light Removal...

Страница 8: ...Difference 131 7 2 12 Perform Verification Scans 1x1 2x2 4x4 Modes 133 7 2 13 Follow Up 142 7 3 Stage Replacement Calibration 146 7 3 1 Mechanically Align the Stage 146 7 3 2 Centre the Stage 155 7 3...

Страница 9: ...ication Stage 234 8 2 6 Specimen Slide 235 8 2 7 Limit Switches On Specimen Stage 235 8 2 8 Rotary Stage Assembly 235 8 2 9 Filter Wheel Assembly 235 8 2 10 Shutter Drive Motor 236 8 2 11 Rear Exhaust...

Страница 10: ...CE GUIDE Page 10 99 Appendix 99 1 Calibration Worksheets 245 99 1 1 Detector Replacement Calibration Worksheets 246 99 1 2 Stage Replacement Calibration Worksheets 253 99 1 3 X Ray Source Replacement...

Страница 11: ...ease become familiar with this chapter before proceeding Section 1 1 Important Precautions 1 1 1 Language WARNING This service manual is available in english only If a customer s service provider requ...

Страница 12: ...GE HEALTHCARE DIRECTION 5158821 100 REVISION 3 EXPLORE LOCUS SP SERVICE GUIDE Page 12...

Страница 13: ...GE HEALTHCARE DIRECTION 5158821 100 REVISION 3 EXPLORE LOCUS SP SERVICE GUIDE Page13...

Страница 14: ...of critical patient data Crush or pinch points Sharp objects DANGER EXCESSIVE VOLTAGE CRUSH POINT DANGER IS USED WHEN A HAZARD EXISTS THAT WILL CAUSE SEVERE PERSONAL INJURY OR DEATH IF INSTRUCTIONS AR...

Страница 15: ...counterweights and discharging capacitors for example 1 LOTO indicates that the energy source is Locked Out and that an Authorized Employee is actively working on the machine equipment process or cir...

Страница 16: ...ed GE Medical personnel The products involved and the accompanying electrical installations are highly sophisticated and special engineering competence is required In performing all electrical work on...

Страница 17: ...handling must remain in control of the customer Section 1 3 Publication Conventions 1 3 1 General Paragraph and Character Styles Prefixes are used to highlight important non safety related information...

Страница 18: ...w the Lockout Tagout safety procedures All fasteners must be tightened according to their torque specification Dispose of the wastes from the installation properly Push any one of the Emergency Stop b...

Страница 19: ...The shutter controls the length of time of each exposure The shutter in the Micro CT assembly has the same function as the shutter on a camera In a camera the shutter interval determines how long the...

Страница 20: ...n they pass through bone Fat a low density material has a low attenuation coefficient X rays will not lose much intensity when they pass through fat Attenuation varies directly with the atomic weight...

Страница 21: ...reconstructed volume The user controls the signal to noise ratio by adjusting parameters like frame averaging the total number of views taken error correction and the energy and intensity of the x ra...

Страница 22: ...volume element It is a single element in a three dimensional image As with pixels each voxel has a numerical value In MicroView each voxel is represented by a shade of gray on the screen RESOLUTION T...

Страница 23: ...e added together not averaged and this sum is recorded as a single piece of data The value of the 2x2 matrix shown is 19 FRAME AVERAGING Frame averaging is a process whereby several frames are average...

Страница 24: ...sitioned and then immobilized X Ray Source The x ray source transmits x rays through the selected filter towards the specimen and onto the detector Detector The detector detects x rays It consists of...

Страница 25: ...Control to specify the scan protocol which determines the hardware and software settings of the scan control the scanning process and start a scan EXPLORE SCAN MANAGER Use eXplore Scan Manager to view...

Страница 26: ...it corrects imperfections in the data and it reconstructs the data into a three dimensional volume MICROVIEW MicroView is the free open source viewing application available from GE Healthcare MicroVie...

Страница 27: ...les GE Healthcare Imaging Applications Microview exe 2 3 2 Files Created During the Acquisition Process PROJECTION FILES What Projection files are the files created during the acquisition process They...

Страница 28: ...imensional images Volumes can be full volumes which are given their own name or mini volumes All mini volumes are saved as mini_vol vff If a second mini volume is created it will overwrite the previou...

Страница 29: ...t was taken in low light The resolution is very low Voltage too high When the voltage is too high the resolution can be low and high dynamic range errors can occur A high dynamic range error appears a...

Страница 30: ...00MB Image file should be 700MB total Use SliceView if the image is too big to downsample in MicroView Large 2D slice loaded but shows up blank Video card texture memory exceeded Adjust maximum textur...

Страница 31: ...l interface card seating Check the frame grabber interface card seating Frequent BSOD run memory check Cluster Problem Possible Cause Suggested Recovery Solution Power failed 1 Turn on the Master node...

Страница 32: ...boot v and make sure this is successful Check authorization for each node including master Every other recon works Ensure slave nodes have booted correctly R drive on acquisition computer does not exi...

Страница 33: ...ReconInterface loads properly but network neighbourhood is empty Ensure Reconserver exe is running see above ReconInterface loads properly but cluster is not present in recon server list Check networ...

Страница 34: ...rol panel applet 3 Restart daemon DOS box ReconInterface image has a discontinuity half way through image Known problem Image does not auto calibrate between chunked sections Do not use or determine w...

Страница 35: ...erent shape from original Width truncation Ensure Fluoro region of interest is wide enough to encompass object ROI should encompass vial walls Incorrect centre of rotation Adjust centre of rotation se...

Страница 36: ...gured jumpers If jumpers are not mis configured check X Ray tube operation Is shutter working Open the lid and observe if there is a flashing red LED If not check for ShutterServer exe in the process...

Страница 37: ...GE HEALTHCARE DIRECTION 5158821 100 REVISION 3 EXPLORE LOCUS SP SERVICE GUIDE Page37...

Страница 38: ...GE HEALTHCARE DIRECTION 5158821 100 REVISION 3 EXPLORE LOCUS SP SERVICE GUIDE Page 38 This page is intentionally left blank...

Страница 39: ...ocks and the interrupt are closed 5 Access the X Ray and Motor Controller software and adjust the tube voltage and tube current to the following settings kV 70 A 20 6 Click on the Turn X Ray On button...

Страница 40: ...be re initialized by double clicking on WarmupApp exe in C Program Files GE Medical Systems eXplore Utilities 5 Access the X Ray and Motor Controller software 6 Ensure the fields below are set to the...

Страница 41: ...is clear 3 Trip the sensor and verify that software is registering the trigger 4 2 4 Comair Rotron Fan FS12B3 Detector Fan 1 Visually inspect that fan is running at correct speed 2 Listen to verify t...

Страница 42: ...indicates Opened at least one of the three interlock switches is not closed properly The x ray tube only can be operated if the Safety Door indicates Closed and the Reset button is not illuminated IF...

Страница 43: ...g BIOS c Exit BIOS d Click on any key to boot from DVD Wait for Boot from DVD prompt 2 Ghost the screen as follows a Hit OK for first 2 prompts b Continue with marking drives OK c Local disk from imag...

Страница 44: ...1 100 REVISION 3 EXPLORE LOCUS SP SERVICE GUIDE Page 44 a Click on Start Microsoft Update Alternatively if Microsoft Update is not on the Start menu go to www microsoft com click on Security Updates T...

Страница 45: ...EVISION 3 EXPLORE LOCUS SP SERVICE GUIDE Page45 b Click on Express c Follow instructions from the website install updates if needed restart if prompted etc 5 Update Norton AntiVirus software a Start P...

Страница 46: ...on Next c Click on Next to install d When complete restart the computer if needed Section 5 2 Back Up Restore 5 2 1 Back Up Calibration and Registry Settings SAVE CALIBRATION SETTINGS 1 Capture a scre...

Страница 47: ...opy C translations1 to D drive BACK UP REGISTRY 6 If needed add the following folder to the C drive Registry Backup 7 Create a sub folder under Registry Backup and label the folder with today s date e...

Страница 48: ...S SP SERVICE GUIDE Page 48 10 Once the Microsoft Registry Editor opens click on the GEHC folder 11 Click on File then choose Export from the drop down list 12 Under Save in find the Registry Backup fo...

Страница 49: ...s date 17 Under File name enter GEMS REG then click on the Save button 18 In Windows Explorer rename the file to GEMS GER This is done to protect the file so that it is not accidentally opened which w...

Страница 50: ...m serial number and date 5 Make two copies of each DVD File one set of DVDs in the system s Device History Record folder located on the back of the system and send the other to Service Engineering Ser...

Страница 51: ...P XW200 should the Dell 650 require replacement The HP XW200 runs Windows XP WARNING Prior to performing the procedures below ensure all registry and calibration data is backed up The new HP computer...

Страница 52: ...on the HP s Desktop 11 Double click the file directories reg on the HP s Desktop SWAP FRAME GRABBER AND BLUE HEAT SERIAL CARDS 12 Shut down the Dell and the HP computers 13 Put on a grounded ESD wrist...

Страница 53: ...n the system If the job is not finished and the system is not ready to be put back in use the authorized person shall apply the Transition LOTO or the Out of Service LOTO whichever is appropriate for...

Страница 54: ...EXPLORE LOCUS SP SERVICE GUIDE Page 54 b Verify the safety of the area c Ensure the safety devices and guards are in place d Return system functions e Remove your lock and tag f Communicate system re...

Страница 55: ...OL LIST Standard toolkit SUPPLIES None SAFETY CONSIDERATIONS X ray shielding contains lead and lead compounds chemicals known to the State of California to cause cancer and other reproductive harm Wea...

Страница 56: ...E HEALTHCARE DIRECTION 5158821 100 REVISION 3 EXPLORE LOCUS SP SERVICE GUIDE Page 56 2 Disconnect ground cable to panel Remove panel REPLACE 1 Reverse of removal FOLLOW ON PROCEDURES None Panel ground...

Страница 57: ...X ray shielding contains lead and lead compounds chemicals known to the State of California to cause cancer and other reproductive harm Wear gloves when handling shielding and wash hands after handli...

Страница 58: ...own to the State of California to cause cancer and other reproductive harm Wear gloves when handling shielding and wash hands after handling The case weighs over 100 lbs Two or three people are needed...

Страница 59: ...is heavier of the two 4 Remove case Slide case left at least 2 to clear electrical flange tilt forward about 1 for door shielding to clear rear shielding and then shift right to clear the detector Con...

Страница 60: ...ray shielding contains lead and lead compounds chemicals known to the State of California to cause cancer and other reproductive harm Wear gloves when handling shielding and wash hands after handling...

Страница 61: ...ce stand 3 Remove cable to bottom of shutter control as required to remove shield 4 Using 9 64 hex key remove two screws from front and back of right shield Lift shield up and away from unit REPLACE R...

Страница 62: ...eproductive harm Wear gloves when handling shielding and wash hands after handling PRECONDITIONS Machine locked out See 6 1 1 for details Left access panel removed See 6 1 2 for details REMOVE 1 Disco...

Страница 63: ...EVISION 3 EXPLORE LOCUS SP SERVICE GUIDE Page63 REPLACE 1 Reverse of removal 2 Torque screws securing blower to bottom of case FOLLOW ON PROCEDURES Observe the blower operating with the power on Repla...

Страница 64: ...DERATIONS X ray shielding contains lead and lead compounds chemicals known to the State of California to cause cancer and other reproductive harm Wear gloves when handling shielding and wash hands aft...

Страница 65: ...Remove lead shield from fan REPLACE 1 Reverse of removal 2 Install fan so that air flow is out of unit 3 Fan power cables are not polarized 4 Use small adjustable wrench as required to hold standoffs...

Страница 66: ...oductive harm Wear gloves when handling shielding and wash hands after handling PRECONDITIONS Machine locked out See 6 1 1 for details Remove left access panel See 6 1 2 for details REMOVE 1 Using Phi...

Страница 67: ...ocedure TOOL LIST Standard toolkit SUPPLIES Lockwashers SAFETY CONSIDERATIONS X ray shielding contains lead and lead compounds chemicals known to the State of California to cause cancer and other repr...

Страница 68: ...CE GUIDE Page 68 1 Using Phillips screwdriver open access cover 2 Using Phillips screwdriver loosen and remove two wires from interlock body Wire polarity is not important but terminal location is REP...

Страница 69: ...e cancer and other reproductive harm Wear gloves when handling shielding and wash hands after handling PRECONDITIONS Machine locked out See 6 1 1 for details Left access panel removed See 6 1 2 for de...

Страница 70: ...torage area TOOL LIST None SUPPLIES None SAFETY CONSIDERATIONS n a PRECONDITIONS Machine locked out See 6 1 1 for details REMOVE 1 Disconnect three cables from back of temperature controller REPLACE R...

Страница 71: ...nd press the green button again until PBl appears in green on the bottom of the display 4 Enter the values below as you scroll through the settings pressing the green button after each entry Use the u...

Страница 72: ...ng contains lead and lead compounds chemicals known to the State of California to cause cancer and other reproductive harm Wear gloves when handling shielding and wash hands after handling PRECONDITIO...

Страница 73: ...e rotation stage is 2mm This can be adjusted manually by turning the lead screw located behind the stage 2 Position limit switch bracket so that the flag is slightly above the centre limit switch sens...

Страница 74: ...e of California to cause cancer and other reproductive harm Wear gloves when handling shielding and wash hands after handling PRECONDITIONS Machine locked out See 6 1 1 for details Door open REMOVE 1...

Страница 75: ...ITIONS Machine locked out See 6 1 1 for details Door open REMOVE 1 Rotate shutter to better access filter wheel 2 Using 1 16 hex key remove three hex screws securing filter wheel retainer to filter wh...

Страница 76: ...ule to remove lower module TOOL LIST Standard toolkit SUPPLIES None SAFETY CONSIDERATIONS None PRECONDITIONS Machine locked out See 6 1 1 for details Depending on how and where the machine is situated...

Страница 77: ...emicals known to the State of California to cause cancer and other reproductive harm Wear gloves when handling shielding and wash hands after handling PRECONDITIONS Machine locked out See 6 1 1 for de...

Страница 78: ...he last screw is removed 6 The stage is supported on two short dowels REPLACE 1 Reverse of removal 2 Insert rotary stage dowels and support it while inserting four screws 3 SNUG DO NOT TIGHTEN THE SCR...

Страница 79: ...this method may be easier than separating the specimen slide from the rotary stage in the small confines of the open door Both methods are described below TOOL LIST Standard toolkit SUPPLIES Cable ti...

Страница 80: ...ex key remove four screws securing gear box slide spacer to specimen slide 3 Using the 4mm hex key ball driver and 8mm socket remove four screws and nuts securing specimen slide to angle plate 4 Using...

Страница 81: ...ws 3 Remove entire rotary stage and specimen slide assembly 4 Separate the rotary stage from specimen slide Using 4mm hex key ball driver and 8mm socket remove four screws and nuts securing specimen s...

Страница 82: ...finger to specimen slide 4 Attach specimen slide to angle plate 5 Attach gear box slide spacer to specimen 6 Use cable ties to secure cables FOLLOW ON PROCEDURES Replace rotary stage perform calibrati...

Страница 83: ...te of California to cause cancer and other reproductive harm Wear gloves when handling shielding and wash hands after handling PRECONDITIONS Machine locked out See 6 1 1 for details Left and right acc...

Страница 84: ...p shielding from source Support shield as last screw is being removed to prevent it from dropping 4 Cut cable ties and remove cooling pipe Set pipe aside 5 Using 5 32 hex key remove four hex screws lo...

Страница 85: ...brittle and may affect image quality REPLACE 1 Place source on adjusting plate 2 With plate flat insert and tighten two rear screws into adjusting plate from below 3 Tilt adjusting plate insert and t...

Страница 86: ...eproductive harm Wear gloves when handling shielding and wash hands after handling PRECONDITIONS Machine locked out See 6 1 1 for details Left access panel removed See 6 1 2 X ray source shielding rem...

Страница 87: ...er motor to bracket REPLACE 1 Reversal of removal 2 Ensure that set screw is seated on flat of shaft 3 Ensure that shutter blades are centered in shutter control assembly upon installation FOLLOW ON P...

Страница 88: ...discarded It gets yellow and brittle and may affect image quality TOOL LIST Standard toolkit SUPPLIES None SAFETY CONSIDERATIONS The X ray source opening contains beryllium Do not touch it WARNING DO...

Страница 89: ...GUIDE Page89 2 Window that is to be discarded is located behind the collimator Washer is between window and collimator RE INSTALL COLLIMATOR 1 Ensure that collimator is re installed so that opening is...

Страница 90: ...d compounds chemicals known to the State of California to cause cancer and other reproductive harm Wear gloves when handling shielding and wash hands after handling PRECONDITIONS Machine locked out Se...

Страница 91: ...ng 5 64 hex key remove the ground cable from detector 5 Using 9 64 hex key remove four screws and lockwashers securing detector to stand Support detector while removing Set aside REPLACE Reverse of re...

Страница 92: ...6 1 2 for details Left x ray shield removed See 6 1 5 for details REMOVE 1 Using 9 64 hex key remove four hex screws and lockwashers and flatwashers securing fan to adjusting plate Fan will pull down...

Страница 93: ...other reproductive harm Wear gloves when handling shielding and wash hands after handling PRECONDITIONS Machine locked out See 6 1 2 for details Left access panel removed See 6 1 2 for details REMOVE...

Страница 94: ...IDERATIONS X ray shielding contains lead and lead compounds chemicals known to the State of California to cause cancer and other reproductive harm Wear gloves when handling shielding and wash hands af...

Страница 95: ...s cover and remove wires 4 Using 3 8 socket remove the four tamper proof screws securing the switch mounting block to the case 5 Using a narrow slotted screwdriver loosen the cover on back of switch 6...

Страница 96: ...GE HEALTHCARE DIRECTION 5158821 100 REVISION 3 EXPLORE LOCUS SP SERVICE GUIDE Page 96 9 Remove switch from mounting block with 5 64 hex key REPLACE Reverse of removal FOLLOW ON PROCEDURES None 5 64...

Страница 97: ...Centre the Stage Perform Verification Scans X Ray Source Replacement see Section 7 4 Source replacement calibration involves Centre the X Ray Source Centre the Stage Calculate Central Slice of X Ray S...

Страница 98: ...8 Precision Dial Indicator 9 Dial Indicator Mount 10 Additional tools required include Shims 8mm socket and ratchet T Allen 5 32 Personal radiation dosimeter custom Allen keys The Centre the Source pr...

Страница 99: ...r The X Ray and Motor Controller C Program Files GE Medical Systems eXplore Utilities X_Ray_Controller exe transgen program C Program Files GE Medial Systems eXplore Utilities Calibration transgen exe...

Страница 100: ...button to offset the home position by 2 mm 4 Move the stage 140mm to the right 5 Use the Detector Alignment Plate to position the detector so that it is precisely parallel and perpendicular to the ma...

Страница 101: ...mounting bolts to adjust the detector alignment first 7 Shim the detector mounting bracket to adjust the elevation and twist the detector while the bolts are loose to adjust the azimuth 8 If the align...

Страница 102: ...light have no value but they will increase file size correction and assembly time 1 Open Windows Explorer and navigate to D Copy the calib folder and rename it original_calib Navigate to C and copy t...

Страница 103: ...down menu When prompted for a password enter EvS8899 8 Ensure the X Ray switch on the unit is ON and the red Reset button is not lit 9 Click the Start Shutter button on the X Ray and Motor Controller...

Страница 104: ...rksheet e g 0 320 2300 2850 and exit Fluoro 15 Access Calibration Tools and choose the Calib Settings tab 16 Click File and choose Read Registry Values from the drop down menu 17 Change the values in...

Страница 105: ...r of Frames to Average field name the file grid_1 in the Name of Series field save the file to the directory D calib click the Capture button The progress of capture is shown in the Fluoro s title bar...

Страница 106: ...curate representation of the actual physical grid To start the Transform1 file creation 1 Correct the grid image using the Calibration Tools program as follows click on the Correct tab in the VFF to C...

Страница 107: ...oming in on individual bebes to check their roundness and the surrounding area for visible stray pixels Not getting the Window and Level right may affect the centroid calculations To Pan move the mous...

Страница 108: ...e Worksheet 18 Press l lowercase L to draw red boxes around each bebe Use the Pan and Zoom features to examine every bebe Ensure that a red box appears around each bebe and that the red dot centroid a...

Страница 109: ...e Transform bin Mode field and Acquired Image bin Mode field 28 Press the Create D Transform1 and Transform1 dat button at the bottom of the window 29 Use Windows Explorer to rename the Transform1 fil...

Страница 110: ...ay Source and position the X Y Centring Ball tool on the cone 2 Turn on the X Ray Source 3 Open Fluoro and press m to display the mouse position on the Fluoro screen 4 Use the X Ray and Motor Controll...

Страница 111: ...on either side of this position To do this 8 Rotate until the bebe is in its outer most position 9 Rotate 3 degrees past the outer most position and capture the image Name the image L1 Record the x a...

Страница 112: ...the Worksheet 17 Determine the real outer bebe by examining the images Starting with L1 correct the file and unwarp it using Transform01 18 Load the corrected and unwarped file into MicroView 19 Zoom...

Страница 113: ...x and y values from that coordinate in the Worksheet 26 Examine all 7 coordinates from the right side of the screen and find the LARGEST x value Note both the x and y value from that coordinate in the...

Страница 114: ...tilt angle 32 Click the Create Transform1 and D Transform1 dat button This often takes a few minutes At the end of this process the system creates the Transform1 file which when run will correct the d...

Страница 115: ...red Image bin Mode field remains 1x1 6 Press the Create D Transform4 and D Transform4 dat button The Transform4 file is created 7 2 6 Calculate Central Slice of X Ray Source This procedure calculates...

Страница 116: ...e Worksheet 7 2 7 Verify Stage Alignment VERIFY STAGE TILT FRONT TO BACK MOVEMENT 1 Turn off X rays and adjust the X Y Centring Ball tool so that the bebes are facing the detector 2 Turn x rays back o...

Страница 117: ...h other e g if one value is 1140 the other must be within 1138 to 1142 If the values ARE NOT within 2 pixels of each other 14 Place shims behind the elevation rail loosen stage bolts etc Tighten the s...

Страница 118: ...1 degree access the X Ray and Motor Controller and adjust the Steps to Travel field e g 50 which are steps in the stepper motor Adjust the Direction and press the Start Motor button The next goal is t...

Страница 119: ...oView and check that the y position is the same within 2 pixels If the y position is not at the Central Slice at the detector end the Central Slice calculation will need to be redone Verify all values...

Страница 120: ...button then physically rotate the X Y Centring Ball tool so that 2 of the 4 adjustment screws are exactly perpendicular to the detector i e not at an angle 2 Elevate the tool using the Elevation feat...

Страница 121: ...ent Damage Possible The tool is extremely delicate Fine adjustments are required DO NOT overtighten the screws One screw turns clockwise and the other turns counter clockwise Turn the screws in tandem...

Страница 122: ...inutes e Press the Turn X Rays off button f Set the kV and A field to the next value in list below and repeat steps c to e wait 2 minutes 80kV 45 A wait 10 minutes 80kV 80 A 21 Capture the image in Fl...

Страница 123: ...the gray band that appears to the left of the black area Make note of the x coordinate and round the coordinate to the nearest 5 pixel Record in the Worksheet 27 Zoom out and move to the right outer m...

Страница 124: ...centre values until they are within 1 pixel of each other as follows a Turn off the X Ray Source b Loosen the 4 stage retaining bolts c Manually adjust the stage using the stage s adjustmentwheel see...

Страница 125: ...e in the Worksheet 38 Save a captured image at both the detector end and the X Ray Source end Name the image closest to the detector smallball vff and the image closest to the X Ray Source largeball v...

Страница 126: ...ack on to keep it warm 9 Correct and unwarp the D1 image and load it into MicroView 10 Draw an ROI Region Of Interest in MicroView in the middle of the white area Position cursor in the white area nea...

Страница 127: ...sheet 12 Add the two mean values determined in the above 2 steps 13 Divide this value by 2 to determine the Half Maximum value Note this value in the Worksheet 14 In MicroView slide the Window slide b...

Страница 128: ...d pan across to the right edge of the image Zoom in on the right edge and position the cursor until the y axis equals the value of the Central Slice determined earlier and the x position is in the cen...

Страница 129: ...he Detector Position field three times for each binning mode 1x1 2x2 4x4 separating each with a space e g 249 74 249 74 249 74 See topic 7 2 9 step 23 4 Complete the Detector Spacing field with the de...

Страница 130: ...find the following Transform files in D Transform1 Transform2 Transform4 Transform1 dat Transform2 dat Transform4 dat Copy these transform files to C Program Files GE Medical Systems Explore Utilitie...

Страница 131: ...ame the subject pixel_size 8 Enter mag_diff in the Scan Description field 9 The Scan Control window opens Choose 2x2wire from the Protocol drop down menu 10 Select the Scan bright and dark first Recon...

Страница 132: ...one side of the plastic dowel to the other zoom in on the left side place your mouse on the furthest edge of the plastic dowel and press 1 pan over to the right side s furthest edge and press 2 you ma...

Страница 133: ...object position OBJ_POS in the protocol current Mag_Diff in registry For example Mag_Diff 85 47 80 65 Mag_Diff 70 47 Record values in Worksheet 26 Return to the Calib Settings tab 27 Click File and c...

Страница 134: ...boxes under Options 9 Start Fluoro 10 Click Menu and choose Position Stages from the drop down list 11 Adjust the elevation until the wires of the center section of the wire phantom extend from the to...

Страница 135: ...4 wires using the 7 and 8 keys in MicroView 27 Select File Save crop coordinates 28 Exit MicroView 29 Click the Load Crop button on the Reconstruction Utility window 30 Press the Recon button View the...

Страница 136: ...lick the Recon button in the Reconstruction Utility window f View the image in MicroView upon completion If the image is improved continue to change the Centre of Rotation in the same direction e g ch...

Страница 137: ...nd_ss 5 View the image in MicroView The wires should appear as round as possible If the wires are not round the Centre of Rotation needs to be adjusted as described above 6 Upon completion make note o...

Страница 138: ...d 11 Once successful click the Set to Central Slice button on the Reconstruction Utility window 12 Click the Advanced button and choose the Reconstruction tab 13 Select Short Scan 14 Click the Recon b...

Страница 139: ...00 REVISION 3 EXPLORE LOCUS SP SERVICE GUIDE Page139 17 Zoom in on the wire Adjust the Window and Level to allow only two pixels to be visible 18 Plot a line across the wire s two brightest pixels usi...

Страница 140: ...een the X Ray Source and the detector or the Detector Spacing under the Calib Settings tab is incorrect 19 Press p to view the plot If the resulting plot is a straight line exit Microview and repeat r...

Страница 141: ...2 to the result This value is the target value in pixels of the wire scan Example 025 007634 3 274 target value 3 274 2 5 274 maximum value Record values in the Worksheet 28 Verify that the line leng...

Страница 142: ...ngs tab in Calibration Tools 2 Call the file calibration_values jpg 3 Save the document to both C and D drives 4 Copy D calib folder to C drive 5 Copy C translations1 to D drive BACK UP REGISTRY 6 If...

Страница 143: ...EVISION 3 EXPLORE LOCUS SP SERVICE GUIDE Page143 9 Enter the following in the text box then click OK regedit 10 Once the Microsoft Registry Editor opens click on the GEHC folder 11 Click on File then...

Страница 144: ...Under Save in find the Registry Backup folder then select the sub folder labelled with today s date 17 Under File name enter GEMS REG then click on the Save button 18 Using Windows Explorer rename th...

Страница 145: ...alibration Values and include the system serial number and date 3 Create zip files containing the acquired images and support files created for each of the 3 wire scans Call the zip files 1x1 zip 2x2...

Страница 146: ...Program Files GE Medical Systems eXplore Utilities WarmupApp exe Calibration Tools C Program Files GE Medical Systems eXplore Utilities Calibration exe X Ray and Motor Controller The X Ray and Motor C...

Страница 147: ...ocking screw at the top of the bracket in order to get the stage aligned see red circle in the left diagram 4 Turn the unit ON using the key and press the red Reset button 5 Warm up the X Ray Source u...

Страница 148: ...imit switches will never be triggered select Magnification from the drop down menu in the Motor field press the Left CW Linear Home button to move the stage toward the detector enter 2 in the mm field...

Страница 149: ...toward the X Ray Source so that is positioned in the centre between the Source and the detector VERIFY STAGE TILT FRONT TO BACK MOVEMENT 15 Attach the X Y Ball Centring tool with the bebes facing tow...

Страница 150: ...ected file is named corrected vff and it is stored in the same folder in which the captured imaged was stored Unwarp the Image 24 Click the Unwarp tab in Calibration Tools and complete the fields as f...

Страница 151: ...iew choose Tools Region Grow Select Lower in the Threshold field Place the mouse over the bebe and press the Spacebar the bebe s solid centre turns green Record the centroid value x y coordinates in t...

Страница 152: ...HEALTHCARE DIRECTION 5158821 100 REVISION 3 EXPLORE LOCUS SP SERVICE GUIDE Page 152 Note The x values must be within 2 pixels of each other e g if one value is 1140 the other must be within 1138 to 11...

Страница 153: ...aced close to the mounting bolts Larger adjustments more than 0 004 will require shims at both the top and the bottom to allow the stage to tip once it is tightened e g large shim on the bottom and sm...

Страница 154: ...rrect and unwarp it Open the image in MicroView and determine the y axis of the bebe using the Region Grow tool in MicroView Record value in Worksheet This y axis must be the same as the Central Slice...

Страница 155: ...ust the stage and view the results until the y axis is within 2 pixels of the previous value after 180 of rotation The end result is that at the Source end the y values at 0 and 180 degree rotation ar...

Страница 156: ...g to rotate the ball 180 8 Watch the Precision Dial Indicator as the ball rotates Note the reading of the Precision Dial Indicator after 180 of rotation e g 0004 in the Worksheet The objective is to a...

Страница 157: ...ove the Dial Indicator Mount and Precision Dial Indicator 18 Select Magnification in the Motor field in the X Ray and Motor Controller window and move the ball 70 mm toward the detector This should be...

Страница 158: ...to zoom out while pressing the right mouse button 23 Threshold the image by sliding the Window slide bar to the left until it reads 0 and sliding the Level slide bar until the edges of the ball appea...

Страница 159: ...ad the corrected and unwarped image into MicroView 32 Find the geometric centre of the ball at the X Ray Source end by making note of the x values on the outer most left and right side of the ball and...

Страница 160: ...value of its x axis is now the CENTRE OF ROTATION Make note of this value in the Worksheet 35 Save a captured image at both the detector end and the X Ray Source end Name the image closest to the det...

Страница 161: ...he eXplore Reconstruction Utility launches automatically when the scan is complete 14 Click the Set to Central Slice button 15 Click the Thumbnail button 16 Change the Z Size field to 5 17 Press the R...

Страница 162: ...on on the Reconstruction Utility window 30 Press the Recon button View the image in MicroView and verify the image is cropped properly then exit MicroView 31 Click the Full Res button De select the Mi...

Страница 163: ...lick the Recon button in the Reconstruction Utility window f View the image in MicroView upon completion If the image is improved continue to change the Centre of Rotation in the same direction e g ch...

Страница 164: ...View the image in MicroView The wires should appear as round as possible If the wires are not round the Centre of Rotation needs to be adjusted as described above 6 Upon completion make note of the di...

Страница 165: ...button on the Reconstruction Utility window 12 Click the Advanced button and choose the Reconstruction tab 13 Change the Centre of Rotation field back to the value of the ideal Centre of Rotation at t...

Страница 166: ...00 REVISION 3 EXPLORE LOCUS SP SERVICE GUIDE Page 166 17 Zoom in on the wire Adjust the Window and Level to allow only two pixels to be visible 18 Plot a line across the wire s two brightest pixels us...

Страница 167: ...etween the X Ray Source and the detector or the Detector Spacing under the Calib Settings tab is incorrect 19 Press p to view the plot If the resulting plot is a straight line exit Microview and repea...

Страница 168: ...resolution value and then add 2 to the result This value is the target value in pixels of the wire scan Record in Worksheet Example 025 007634 3 274 target value 3 274 2 5 274 maximum value 28 Verify...

Страница 169: ...the X Ray Source To adjust the X Ray Source 1 Open Windows Explorer and navigate to D Copy the calib folder and rename it original_calib 2 Turn the unit ON using the key and press the red Reset button...

Страница 170: ...button to move the stage toward the detector enter 2 in the mm field click on the right or CCW radio button then press the Linear Stage Motion button to offset the home position by 2 mm 7 Ensure X ray...

Страница 171: ...in the Fluoro s title bar as saving Wait until the image is captured 12 Turn off the X Ray Source and capture a dark image in Fluoro Call this image dark 13 Mount the X Y Centring ball tool on the st...

Страница 172: ...the first movement 20 Return to the X Ray and Motor Controller window 21 Use the Rotation setting to rotate the ball 360 180 at a time Re zero the Dial Indicator if necessary Watch as the ball is rota...

Страница 173: ...Dial Indicator if necessary Watch as the ball is rotating to ensure that the tip of the Precision Dial Indicator is touching the ball at all points of rotation and that it is not pegged 28 Rotate the...

Страница 174: ...of Frames to Capture field enter 3 in the Number of Frames to Average field name the file ball in the Name of Series field save the file to the directory D calib click the Capture button 36 Correct t...

Страница 175: ...nwarping 40 Double click on zz in Windows Explorer to load the image into MicroView 41 Double click on the W and L parameters in the lower right of the screen Change the Update mode to Delayed updates...

Страница 176: ...bar to display a pop up window where you enter a specific value 44 Zoom in on the outer right most side of the ball 45 Place the mouse in the middle of the gray band that appears to the right of the...

Страница 177: ...g puts the ball in the centre of the detector To reach the correct x value a Turn off the X Ray Source b Loosen the 2 screws on the top of the Source and move the Source using the Source adjustment wh...

Страница 178: ...and unwarp the captured image using Calibration Tools Find the Geometric Centre of the Ball at Detector End Note To find the geometric centre of the ball determine the x value on the right and left si...

Страница 179: ...s together and then divide by 2 This value is the ball s geometric centre Make note of this value in the Worksheet 11 Use the X Ray and Motor Controller s Magnification setting to move the ball toward...

Страница 180: ...Small movements of the adjustment wheel are required One pixel will equal a few 1 to 5 degrees turn of the wheel Once confirmed i e the values of the 2 geometric centres are the same or 1 pixel 15 Car...

Страница 181: ...both bebes appear in the centre of the screen in Fluoro 3 Capture the image and name it CS1 4 Move the tool 120mm toward the X Ray Source and capture an image Name the image CS2 5 Correct the CS1 ima...

Страница 182: ...and bottom bebe in the Worksheet 8 Correct the CS2 image unwarp it and load it into MicroView Determine the y coordinates of both bebes using MicroView s Region Grow tool 9 Make note of the CS2 file...

Страница 183: ...o and press m to display the mouse position window 5 Rotate the tool until the top bebe appears in the centre of the x axis of the screen 6 Adjust the elevation using the X Ray and Motor Controller pr...

Страница 184: ...oro is less than the x value of the bottom bebe the shim goes on the bottom of the stage If the x value of the top bebe is higher the shim goes at the top of the stage The shims are placed close to th...

Страница 185: ...ion capture the image correct and unwarp it Open the image in MicroView and determine the y axis of the bebe using the Region Grow tool in MicroView This y axis must be the same as the Central Slice v...

Страница 186: ...ector in order to mechanically adjust the stage The 4 stage levelling screws sit in slanted slotted holes see diagram on the left so when loosened allow for movement in the direction shown below Note...

Страница 187: ...Controller application will accept movements as fine as 0 1mm 3 Turn on the X Ray Source using the X Ray and Motor Controller Wait a few minutes for the X Ray Source to stabilize 4 Capture an image an...

Страница 188: ...GE HEALTHCARE DIRECTION 5158821 100 REVISION 3 EXPLORE LOCUS SP SERVICE GUIDE Page 188 11 Repeat the above step in the black area of the screen and record value in the Worksheet...

Страница 189: ...f the screen Enter the Half Maximum value calculated in step 13 in the Level field 16 Zoom in on the left edge of the image and position the cursor until the y axis equals the value of the Central Sli...

Страница 190: ...alues in the Worksheet Make note of its line length in the Worksheet 22 Access the Calculators tab in Calibration Tools and enter the following in the Source Detector Distance Calculator width1 enter...

Страница 191: ...f Rotation fields as follows Centre of Rotation1 enter the Centre of Rotation as determined during the Centre the Stage procedure Centre of Rotation2 enter of the Centre of Rotation value note value i...

Страница 192: ...ter mag_diff in the Scan Description field 9 The Scan Control window opens Choose 2x2wire from the Protocol drop down menu 10 Select the Scan bright and dark first Recon after scan and Home all stages...

Страница 193: ...side of the plastic dowel to the other zoom in on the left side place your mouse on the furthest edge of the plastic dowel and press 1 pan over to the right side s furthest edge and press 2 you may n...

Страница 194: ...ag_Diff 70 47 Record values in the Worksheet 26 Return to the Calib Settings tab 27 Click File and choose Read Registry Values from the drop down menu 28 Change the Mag_Diff field to the newly calcula...

Страница 195: ...Start Scan button the scan takes approximately 45 minutes and follow the prompts to place and remove the specimen from the scanner for the bright and dark scans The eXplore Reconstruction Utility lau...

Страница 196: ...tton on the Reconstruction Utility window 30 Press the Recon button View the image in MicroView and verify the image is cropped properly then exit MicroView 31 Click the Full Res button De select the...

Страница 197: ...the Recon button in the Reconstruction Utility window f View the image in MicroView upon completion If the image is improved continue to change the Centre of Rotation in the same direction e g change...

Страница 198: ...View the image in MicroView The wires should appear as round as possible If the wires are not round the Centre of Rotation needs to be adjusted as described above 6 Upon completion make note of the di...

Страница 199: ...fy that the wires appear round 11 Once successful click the Set to Central Slice button on the Reconstruction Utility window 12 Select Short Scan 13 Click the Recon button on the Reconstruction Utilit...

Страница 200: ...00 REVISION 3 EXPLORE LOCUS SP SERVICE GUIDE Page 200 16 Zoom in on the wire Adjust the Window and Level to allow only two pixels to be visible 17 Plot a line across the wire s two brightest pixels us...

Страница 201: ...etween the X Ray Source and the detector or the Detector Spacing under the Calib Settings tab is incorrect 18 Press p to view the plot If the resulting plot is a straight line exit Microview and repea...

Страница 202: ...to the result This value is the target value in pixels of the wire scan Example 025 007634 3 274 target value 3 274 2 5 274 maximum value Record values in the Worksheet 27 Verify that the line length...

Страница 203: ...gs tab in Calibration Tools 2 Call the file calibration_values jpg 3 Save the document to both C and D drives 4 Copy D calib folder to C drive 5 Copy C translations1 to D drive BACK UP REGISTRY 6 If n...

Страница 204: ...VISION 3 EXPLORE LOCUS SP SERVICE GUIDE Page 204 9 Enter the following in the text box then click OK regedit 10 Once the Microsoft Registry Editor opens click on the GEHC folder 11 Click on File then...

Страница 205: ...Under Save in find the Registry Backup folder then select the sub folder labelled with today s date 17 Under File name enter GEMS REG then click on the Save button 18 Using Windows Explorer rename th...

Страница 206: ...Calibration Values and include the system serial number and date 3 Create zip files containing the acquired images and support files created for each of the 3 wire scans Call the zip files 1x1 zip 2x2...

Страница 207: ...gram Files GE Medial Systems eXplore Utilities Calibration transgen exe 7 5 1 Centre the Stage This procedure is used to centre the stage between the X Ray Source and the detector 1 Open Windows Explo...

Страница 208: ...tor field press the Left CW Linear Home button to move the stage toward the Source enter 2 in the mm field click on the right or CCW radio button then press the Linear Stage Motion button to offset th...

Страница 209: ...a dark image in Fluoro Call this image dark 12 Mount the X Y Centring ball tool on the stage cone Physically rotate the X Y Centring Ball tool so that 2 of the 4 adjustment screws are exactly perpend...

Страница 210: ...n and that it is not pegged Re zero the Dial Indicator if necessary Centre the Ball 21 Use the Rotation setting to rotate the ball 180 22 Watch the Precision Dial Indicator as the ball rotates Note th...

Страница 211: ...e required Continue to make adjustments until the ball can rotate 360 without the Dial Indicator reading moving more than 0002 31 Once the ball has been centred remove the Dial Indicator Mount and Pre...

Страница 212: ...ed file is named corrected vff and it is stored in the same folder in which the captured imaged was stored Unwarp the Image 36 Click the Unwarp tab in Calibration Tools and complete the fields as foll...

Страница 213: ...side of the ball Add the values together and divide by 2 To find the geometric centre as follows 41 Use the Pan and Zoom features in MicroView to get the ball in the desired area of the screen Note T...

Страница 214: ...centre Make note of this value in the Worksheet 48 Use the X Ray and Motor Controller s Magnification setting to move the ball toward the X Ray Source 140mm 49 Capture the image calling the file capt...

Страница 215: ...c centres are the same or 1 pixel 54 Carefully tighten the 4 bolts snug only once the values are close Make the bolts sufficiently tight so that the adjustment wheel will operate but is difficult to t...

Страница 216: ...double clicking on the desktop icon 5 Click Scan New Subject and name the subject 1x1 or 2x2 or 4x4 depending on which verification scans are being performed 6 Enter 1x1wire in the Scan Description f...

Страница 217: ...water and HU calibration values in the Worksheet Enter 1 minus one values for each field 23 Select Short Scan This looks at the first 200 views instead of all 360 views It will emphasize any errors in...

Страница 218: ...o be adjusted as follows a Exit MicroView b Click the Advanced button in the Reconstruction Utility window c Click the Reconstruction tab d Change the Centre of Rotation field Make only small incremen...

Страница 219: ...E OF ROTATION AT EACH END FOR 1X1 MODE ONLY 1 Change the Z Origin field on the Reconstruction Utility window to 200 This represents one end of the wire phantom 2 Click the Advanced button then choose...

Страница 220: ...t see Complete Transform1 File Creation 10 Change the centre of rotation back to the ideal found at the Central Slice and repeat the reconstruction with all 360 views de select the Short Scan field Na...

Страница 221: ...00 REVISION 3 EXPLORE LOCUS SP SERVICE GUIDE Page221 17 Zoom in on the wire Adjust the Window and Level to allow only two pixels to be visible 18 Plot a line across the wire s two brightest pixels usi...

Страница 222: ...e X Ray Source and the detector or the Detector Spacing under the Calib Settings tab is incorrect 19 Press p to view the plot If the resulting plot is a straight line exit Microview and repeat reconst...

Страница 223: ...d 2 to the result This value is the target value in pixels of the wire scan Example 025 007634 3 274 target value 3 274 2 5 274 maximum value Record values in the Worksheet 28 Verify that the line len...

Страница 224: ...llows Centre of Rotation1 enter the Centre of Rotation as determined during the Centre the Stage procedure Centre of Rotation2 enter of the Centre of Rotation value Centre of Rotation4 enter of the Ce...

Страница 225: ...eded add the following folder to the C drive Registry Backup 7 Create a sub folder under Registry Backup and label the folder with today s date e g yymmdd 8 Click on the Microsoft start button in the...

Страница 226: ...Export from the drop down list 12 Under Save in find the Registry Backup folder then select the sub folder labelled with today s date 13 Under File name enter GEHC REG then click on the Save button 1...

Страница 227: ...e transform and transform dat files found in D drive the D calib folder and the D detector folder the C Program Files GE Medical Systems folder the newly created calibration_values txt file all saved...

Страница 228: ...GE HEALTHCARE DIRECTION 5158821 100 REVISION 3 EXPLORE LOCUS SP SERVICE GUIDE Page 228...

Страница 229: ...is a vital part of preventive maintenance and quality control Maintaining accurate records which includes a well maintained history of the unit assists Service Technicians with their system diagnosis...

Страница 230: ...AY SHIELDING X ray shielding contains lead and lead compounds chemicals known to the State of California to cause cancer and other reproductive harm Wear gloves when handling shielding and wash hands...

Страница 231: ...loves turning them inside out and put gloves in the biohazard plastic bag Seal and give the bag to appropriate personnel for proper disposal Approved Cleaning Products Common household bleach dilute 1...

Страница 232: ...itch on the CM 8X Control Box 2 Pull out the golden tab release see picture 3 Pull out the LED lamp from the socket 4 Replace LED lamp 5 Replace the button cover 8 2 4 Interlock Body The unit has four...

Страница 233: ...otor Controller indicates Safety door is opened at least one of the four interlock switches is not closed properly Check the electronic wiring of the interlock using a multi meter When all four interl...

Страница 234: ...Motor Controller software and verify that sensor indicates it is clear 3 Select Magnification from the drop down menu in the Motor field Press the Left CW Linear Home button to move the stage toward t...

Страница 235: ...indicates it is clear 3 Select Elevation from the drop down menu in the Motor field Press the Left CW Linear Home button to move the stage up Verify that the software is registering the trigger displa...

Страница 236: ...gly The shorter the exposure time the faster the shutter should move 5 Stop shutter and verify that the shutter stops in home position 8 2 11 Rear Exhaust Fans 1 Visually inspect that fan is running a...

Страница 237: ...air Blower Used to cool the X ray tube 1 Power up the system verify that the centre part of the Blower spins 2 Feel for any abnormal vibration 3 Listen to verify that the fan is not making extra noise...

Страница 238: ...er and check for any cracking or discolouration 8 2 18 Temperature Controller 1 Verify that the system is running at approximately 12 98 The number on the bottom LED display green on the temperature c...

Страница 239: ...ipe system covers with a damp cloth alcohol or detergent water and dry immediately with a dry cloth 8 2 21 Control Modules 1 Clean the module interior open up all control module boxes CM 8X CMR8X PDMM...

Страница 240: ...ol toluene ethyl acid ammonia or methyl chloride Using any of these chemicals may cause permanent damage to the flat panel screen Some commercial window cleaners contain ammonia and are therefore unac...

Страница 241: ...ication Scans 7 5 2 Edit Calibration Settings 7 5 3 Follow Up 7 5 4 Section 8 3 Preventive Maintenance Checklist 8 3 1 Completing and Filing the Checklist 1 Copy the Preventive Maintenance Performance...

Страница 242: ...ssembly Operational 8 2 9 Inspected Filter Wheel Assembly 8 2 10 Verified Shutter Drive Motor Operational 8 2 11 Inspected Cleaned Rear Exhaust Fans 8 2 12 Verified Fan Under X Ray Source Operational...

Страница 243: ..._____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________...

Страница 244: ...GE HEALTHCARE DIRECTION 5158821 100 REVISION 3 EXPLORE LOCUS SP SERVICE GUIDE Page 244 This page is intentionally left blank...

Страница 245: ...g blank Worksheets may be used when calibrating the eXplore Locus SP There are different sets of Worksheets depending on whether you are performing the following Detector Replacement Calibration Stage...

Страница 246: ...undary TY Highest X axis boundary actual is 4 more than displayed HX Lowest Y boundary LY Lowest Y boundary minus top Y boundary LY TY Parameter Description Parameter Value BB 1 X axis position A BB 2...

Страница 247: ...ameter Value Tilt Calculator X1 pos for left side Tilt Calculator Y1 pos for left side Tilt Calculator X2 pos for right side Tilt Calculator Y2 pos for right side Left centroid Y value Right centroid...

Страница 248: ...X axis Top bebe after 180 rotation Y axis X axis Top bebe after 180 rotation Y axis X axis Top bebe after 180 rotation Y axis X axis Top bebe after 180 rotation Y axis X axis Top bebe after 180 rotati...

Страница 249: ...e D1 Half Maximum Value see formula D1 line length D2 white area mean value D2 black area mean value D2 Half Maximum Value see formula D2 line length Source Detector Distance Parameter Description Par...

Страница 250: ...e Ideal Center of Rotation at Central Slice VERIFY CENTER OF ROTATION AT EACH END Parameter Description Parameter Value Mean value of plastic Value at top of peak Full Width Half Maximum Value Line le...

Страница 251: ...arget value Maximum value FIND THE IDEAL CENTER OF ROTATION AT THE CENTRAL SLICE Parameter Description Parameter Value Line angle Existing air calibration value Existing water calibration value Existi...

Страница 252: ...GUIDE Page 252 Date calibration was finished _______________________________ Engineer doing calibration ______________________________ Locus SP serial number _____________________________ Customer __...

Страница 253: ...180 rotation Precision Dial reading after 180 rotation Precision Dial reading after 180 rotation Precision Dial reading after 180 rotation Precision Dial reading after 180 rotation Precision Dial rea...

Страница 254: ...enter of Rotation at Central Slice VERIFY CENTER OF ROTATION AT EACH END end Center Of Rotation adjusted end Center Of Rotation adjusted Mean value of black area WIRE 1 Value at top of peak Full Width...

Страница 255: ...gth in pixels Resolution on right side of Scan Mgr Window Target value in pixels of wire scan FIND THE IDEAL CENTER OF ROTATION AT THE CENTRAL SLICE Parameter Description Parameter Value Line angle Ex...

Страница 256: ...CE GUIDE Page 256 Date calibration was finished _______________________________ Engineer doing calibration ______________________________ Locus SP serial number _____________________________ Customer...

Страница 257: ...is L Geometric center of ball X axis L R 2 Right side of ball X axis R Left side of ball X axis L Geometric center of ball X axis L R 2 Right side of ball X axis R Left side of ball X axis L Geometric...

Страница 258: ...ometric center of ball X axis toward detector L R 2 Left side of ball X axis toward source L Right side of ball X axis toward source R Geometric center of ball X axis toward source L R 2 Center Of Rot...

Страница 259: ...after 180 rotate Y axis X axis Top bebe after 180 rotate Y axis X axis Top bebe after 180 rotate Y axis X axis Top bebe after 180 rotate Y axis X axis Top bebe after 180 rotate Y axis X axis Top bebe...

Страница 260: ...er Description Parameter Value of Center Of Rotation of Center Of Rotation of Central Slice of Central Slice New X ray tubes serial number Parameter Description Parameter Value Marked diameter of dowe...

Страница 261: ...enter Of Rotation adjusted MEASURE THE WIRES AT CENTRAL SLICE Mean value of plastic WIRE 1 M Value at top of peak T Full Width Half Maximum Value M T 2 Line length in pixels Resolution value R Target...

Страница 262: ...n pixels Resolution value R Target value in pixels 025 R Maximum value Target value 2 FIND THE IDEAL CENTER OF ROTATION AT THE CENTRAL SLICE Parameter Description Parameter Value Line angle Existing a...

Страница 263: ...libration was finished _______________________________ Engineer doing calibration ______________________________ Locus SP serial number _____________________________ Customer _________________________...

Страница 264: ...of ball X axis toward source L Right side of ball X axis toward source R Geometric center of ball X axis toward source L R 2 Center Of Rotation Parameter Description Parameter Value Line angle Existin...

Страница 265: ...in pixels 025 R Maximum value Target value 2 Mean value of plastic WIRE 3 M Value at top of peak T Full Width Half Maximum Value M T 2 Line length in pixels Resolution value R Target value in pixels...

Страница 266: ...er _____________________________ Customer _____________________________ Existing air calibration value Existing water calibration value Existing HU calibration value Ideal Center of Rotation at Centra...

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