GE Healthcare eXplore Locus SP Service Manual Download Page 253

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GE H

EALTHCARE

IRECTION

5158821-100, R

EVISION

PLORE

OCUS

SP S

ERVICE

UIDE

Page 253

99.1.2

Stage Replacement Calibration Worksheets

TOPIC 7.3.1 MECHANICALLY ALIGN THE STAGE:

TOPIC 7.3.2 CENTRE THE STAGE:

Parameter Description

Parameter Value

Shim1 centroid value of bebe X axis

Shim1 centroid value of bebe Y axis

Shim2 centroid value of bebe X axis

Shim2 centroid value of bebe Y axis

Parameter Description

Parameter Value

Precision Dial reading after 180º rotation

Left side of ball X- value

Right side of ball X- value

Ball geometric center X-value

Left side of ball X- value

Right side of ball X- value

STAGE REPLACEMENT CALIBRATION WORKSHEET

Summary of Contents for Healthcare eXplore Locus SP

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

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 243: ..._____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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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