HEIDELBERG HRA 2 Operation Manual Download Page 46

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7.6 Scanning Specifications

Function

Specification

Field of view:

30°x30°, 20°x20°, 15°x15°, wide field compos-

ite image to 120°

Focus Range

-12 to +12 diopters spherical, increments of

0,25dpt.

High Resolution Mode:

Scan Size

30°x30°, 20°x20°, 15°x15°

Digitized Image Size (Pixels)

1536x1536, 1024x1024, 768x768

Max. Image Frequency

5 Hz, 7 Hz, 9 Hz

Scan Time/Image

96ms to192 ms

Digital Resolution

5µm/pixel

Z-Scan Depth

Max. 8mm

High Speed Mode

Scan Size

30°x30°, 20°x20°, 15°x15°

Digitized Image Size (Pixels)

768x768, 512x512, 384x384

Max. Image Frequency (single)

9Hz, 12,5Hz, 16Hz

Max. Image Frequency (pairs)

5Hz, 7Hz, 9Hz

Scan Time/Image

48ms to 96ms

Digital Resolution

10µm/pixel

Z-Scan Depth

Max. 8mm

Summary of Contents for HRA 2

Page 1: ...idelberg Retina Angiograph 2 HRA 2 Operation Manual Revision 1 1 1E March 2003 Heidelberg Engineering GmbH Printed in Germany Technical Specifications are Subject to change without notice Art No 97 039 002 ...

Page 2: ...2 EP 0 498 280 B1 Heidelberg Engineering GmbH Gerhart Hauptmann Strasse 30 69221 Dossenheim Tel 06221 64 63 0 Fax 06221 64 63 62 Internet http www HeidelbergEngineering de Internet http www HeidelbergEngineering com In the United States of America Heidelberg Engineering Inc Heidelberg Engineering Inc Sales and Marketing Technical Support 1499 Poinsetta Avenue Suite 160 410 Harris Road Vista CA 920...

Page 3: ...Heidelberg Retina Angiograph 2 HRA 2 Operation Manual ...

Page 4: ......

Page 5: ... the Instrument On and Off 11 4 1 1 Turning On 11 4 1 2 Turning Off 11 4 2 Controls 11 4 2 1 Touch Panel 11 4 2 2 Foot switch 23 4 2 3 Keyboard 23 4 2 4 Mouse 23 4 2 5 Focus knob 23 4 2 6 Filter Lever 23 4 2 7 Sensitivity Knob 24 5 Image Acquisition 25 5 1 Preparation 25 5 1 1 Preparing the Patient 25 5 1 2 Preparing the Instrument 25 5 2 Image Acquisition 25 5 2 1 Creating a new patient record 25...

Page 6: ...ite Images 36 6 2 2 Computing Mean Images 37 6 2 3 Eye Movement Correction 38 6 3 Printing 38 7 Technical Data 40 7 1 Model Type and Manufacturer 40 7 2 Environmental Specifications 40 7 3 Power Supply and fuses 40 7 4 Isolation Transformer for PC components 41 7 5 Laser Source 41 7 6 Scanning Specifications 42 7 7 PC Requirements 43 7 8 Service Maintenance and Cleaning 43 7 9 Labels 44 7 10 Dispo...

Page 7: ...layer by layer which is comparable to laser scanning tomography The laser sources contained in the Heidelberg Retina Angiograph 2 emit laser light of three different wave lengths for fluorescein angiography the blue line of a solid state laser 488 nm is used to excite the fluo rescein A barrier filter at 500 nm edge wavelength separates excitation and fluorescent light The same wavelength but with...

Page 8: ... components to an IEC 60601 1 proven isolation transformer Doing so could lead to electrical shock to the user and pa tient in the case of a failure of the PC or to a PC accessory Do not use a network connection without network isolation in accordance to IEC 60601 1 In case of a failure in the network there could be a hazard of electrical shock to the user and patient Make sure that the environmen...

Page 9: ... image quality and incorrect diagnoses Do not start an examination without informing the patient about the examination proce dure Wrong patient behavior during the examination may lead to poor image quality and incorrect diagnoses Clean and disinfect chin rest and head rest after each examination Contaminated parts may lead to infections or disease contraction Read chapter 7 8 Service Maintenance ...

Page 10: ... fundus can be selected by rotating the camera around two orthogonal axes The control panel is used to control image acquisition Here the basic image acquisition parame ters such as angiography type laser intensity detector sensitivity size of the scanning field and position of the focal plane are specified The image acquisition itself is initiated from the control panel The laser module contains ...

Page 11: ...er module for installation in the personal computer Cable touch panel to power supply Cable frame grabber module to power supply Cable frame grabber module to camera CD containing operation software Software protector Operation manual Personal computer with hard disk floppy drive magneto optic drive VGA board color monitor keyboard mouse Microsoft Windows 2000 XP operating system Isolation transfo...

Page 12: ...ents environment without separa tion via an isolation transformer 5 Connect all cables between camera laser box and PC in accordance to the connection diagram shown below Make sure that all cables are in good condition correctly inserted The picture below shows the cable connections to the back of the Laser Box Metal shielded fiber con nected to the camera AC Power Supply 110 230V Foot Switch Debu...

Page 13: ...aser Safety This instrument contains a solid state laser and two diode lasers The instrument emits visible and invisible laser light through the objective lens on the front of the laser scanning camera The Hei delberg Retina Angiograph 2 is a Class 1 laser system It does not pose any safety hazard whatso ever The laser class label is located on the rear panel of the camera housing and the rear pan...

Page 14: ... usually occur during normal use of the instrument 3 5 Care The Heidelberg Retina Angiograph 2 is a precision optical instrument Please protect the instru ment from dust and moisture and avoid subjecting it to shocks or strong forces The lens surface on the front of the camera should be carefully cleaned at regular intervals possi bly every day For this purpose it is best to use acetone and a soft...

Page 15: ...best to turn it on in the morning and not to turn it off again until the evening 4 1 2 Turning Off To turn the Heidelberg Retina Angiograph 2 off proceed as follows 1 If the acquisition dialog is open and the live image is visible on the screen stop the image acquisition with the freeze button on the touch panel and leave the acquisition dialog 2 Turn off the power supply The power switch is locat...

Page 16: ...12 4 2 1 1 Freeze Screen Immediately after switching on the device 4 2 1 2 Freeze Screen HRA2 Acquisition Module started in Eye Explorer Press button 0 to go to live mode and therefore to main screen ...

Page 17: ...13 4 2 1 3 Main Screen FA Red Free modes are not available during warm up approx minute 4 2 1 4 Main Screen FA laser warmed up Filter in angiography mode ...

Page 18: ... up Filter in Red Free IR reflectance mode 4 2 1 6 Target Select Screen Press button 13 to select this screen Choose either the external or one of the internal targets To switch off all targets press the button for the selected target again ...

Page 19: ...al internal target selected The letters right and left of the internal target buttons show where the temporal T and the nasal N side are 4 2 1 8 Target Select Screen The T N letters change whenever the camera head is moved to the other eye ...

Page 20: ...get is indicated on the select target button 4 2 1 10 Acquire Mode Screen Press button 10 on main screen once twice if not active to activate this screen The buttons marked b open a respective screen for selection of the respective parameter ...

Page 21: ... 1 11 Select Time for T Sequence Screen Press button 16b to get to this screen Use to change the default time for a time series 4 2 1 12 Main Screen The length of the time series is indicated on button 10 now ...

Page 22: ...t Depth for Z Sequence Screen On this screen the z scan depth can be changed similar to the time series before 4 2 1 14 Select Frames for M Sequence Screen Change number of frames that are to be averaged to a mean image ...

Page 23: ...19 4 2 1 15 Main Screen 3x3 Composite Mode The current image number is indicated on button 10 4 2 1 16 Main Screen 3x3 Composite Mode After acquisition of one frame the target changes automatically ...

Page 24: ...20 4 2 1 17 Main Screen 3x3 Composite Mode Acquisition of last image of the 3x3 composite 4 2 1 18 Main Screen After the last 3x3 composite image the mode changes back to single automatically ...

Page 25: ...ction timer was started button 14 will blink Press this button to start the injection timer for the current mode Afterwards button 14 stops blinking and stays activated blue 4 2 1 20 More Screen This screen is reached via button 12 on the main screen Select high speed or high resolution mode here ...

Page 26: ... More Screen A internal myopic lens can be activated here 4 2 1 22 Freeze Screen Interlock An interlock can be triggered if the FA red free laser power gets to high or if one or both scanners do not work properly ...

Page 27: ... the backside of the camera head changes the focus By turning this knob refractive errors of the patients eye can be compensated for The current focus compensation is always shown at the lower left side of the PC acquisition module screen units are diopters When examining a patient set the focus compensa tion roughly to the patient s spherical equivalent re fraction and then turn the focus knob un...

Page 28: ...the camera Thus by turning the knob the image brightness changes high sensitivity high brightness low sensitivity low brightness The current sensitivity value is displayed on the lower left side of the PC acquisition module screen Note that the image begins to blur when the sensitivity is set to values lower than 40 50 ...

Page 29: ...luorescein and indocya nine angiography inject both dyes at the same time 5 1 2 Preparing the Instrument The startup procedure is described in Chapter 4 General Operating Information 5 2 Image Acquisition The following is a description of the individual steps required for acquisition with the Heidelberg Retina Angiograph 2 It is subdivided into the settings required for the computer the adjustment...

Page 30: ...to re enter all patient related data Just select the desired patient and click on the New Ex amination tool bar button or press the right mouse button and select New Examination from the context pop up menu 5 2 2 Creating a new examination The creation of a new examination is the first step after you have entered a new patient The Hei delberg Eye Explorer is using so called acquisition modules to ...

Page 31: ... Panel Settings and Patient Alignment 1 The touch panel can now be used to control the image acquisition see Chapter 4 2 1 Touch Panel Usually the following baseline settings for the touch panel are used Select the infrared reflection acquisition mode press the IR button Set scan angle to 30 degrees using the scan size button 2 Ask the patient to position their head and chin firmly against the hea...

Page 32: ...en Now turn the camera on its horizontal and vertical axes so that the structure to be examined is visible on the screen Move the camera slightly up down and sideways until the image appears brightest 5 Then move the focal plane until the image is brightest and set the detector sensitivity by turning the sensitivity button on the touch panel so that you see a bright but not overexposed picture Ove...

Page 33: ...ds until a laser safety timeout will occur The remaining time depends on the current setting of the scan angle The image acquisition time is longest when the maximum scan angle is used 14 Images x MB free Number of images already acquired into memory Memory available for new images in MB The bar graphically represents the memory used by the already acquired images and the remaining free acquisitio...

Page 34: ...t 2 seconds for setting the length of the cyclic buffer see Chapter 4 3 1 These images are stored as soon as you hit the Acquire button to ini tiate the acquisition of a time resolved image series This ensures that the images of the last 2 seconds are stored before starting the time series 7 The image intensity will vary quickly during the inlet phase of the dye Watch the image on the screen Make ...

Page 35: ...irst pa tient switch to the acquisition menu and continue with the image acquisition The clocks for the injection dyes will be automatically set to the right patient and the new images will be appended to the existing images 5 3 Image Acquisition Setup The following setup functions are available inside the acquisition module 5 3 1 Scan Parameter Setup Select Setup and Scan Parameter to modify one ...

Page 36: ...arate window in its full resolution You can also open the context pop up menu using the right mouse button and select the command Display The following dialog will open in a separate window and will have its own menu and tool bar The first four buttons in this tool bar buttons are tools to create overlays on an image A tool can be activated by a click on one of the buttons and will be visualized b...

Page 37: ...esolution size Scales the image to fit into the actual windows size The window size can be adjusted with the mouse as usual You can use the Zoom menu to select one of the predefined zoom factors or just drag a frame about the area you want to zoom in Misc Show the previous next image within the same examination Puts the image to the active lightbox Deletes the actual image and proceeds automatical...

Page 38: ...kly get a feeling on how the movement of the red square will affect the image Alternatively you can enter two values per centage for contrast and brightness There are 4 different settings for Sharpen and Noise Reduction starting with None default to High Click on the Close button to close the image enhancement dialog 6 1 3 Movie Display Double click on a movie icon to play back the movie in a sepa...

Page 39: ...econd This enables you to play back the movie in higher speed or slow motion Play back with eye movement correction If the movie images have already been aligned see section Image processing on how to do that you can play back the movie without eye movements Use Movie and select Eye Move ment Correction to enable this feature 6 1 4 Expanding a Movie If you would like to access all the images withi...

Page 40: ...ber of selected images and on the performance of your computer system the image processing may take up to several minutes When the calculation is ready the software will display the resulting image and will appended this image at the end of the examination If you want to remove all source images after computation of the composite it is necessary to compute the composite images before you archive t...

Page 41: ...image series suitable for the mosaic computation it is important to avoid any movements of the camera mounting base or any adjustments of the height of the camera 6 2 2 Computing Mean Images To compute a mean image of several single images select the images as described above and choose Compute Mean Image After the averaging procedure the resulting image is appended at the end of the examination A...

Page 42: ...rotation will cause a movement of the im age borders 6 3 Printing To print images on an attached printer select the desired images in the image view using the mouse The selection of multiple images works as you are used to do it with the Windows file explorer Please refer to the Heidelberg Eye Explorer A single click with the left mouse button selects one image You can select multiple images if yo...

Page 43: ...ort Neither header and footer nor patient data will be printed Click on the button Customize header and footer of printout to personalize the header and footer region You can define several file paths to your own bitmap files BMP which shell be printed in the header and footer region of the report This can be used to put personal information like text and logos on the printout To create files in B...

Page 44: ...vironmental Specifications Environmental Specification Operating Non Operating Temperature 10 C to 40 C 50 F to 104 F 30 C to 60 C 22F to 140F Rel Humidity 10 to 90 10 to 100 7 3 Power Supply and fuses Specification Tolerances Input Voltage 100V to 240V Frequency 50Hz to 60Hz Fuse 230V 1 25AT Fuse 110V 2 5AT HRA2 power consumption 70 W PC components See technical specifications for the PC componen...

Page 45: ...r UL2601 standard Voltage Manufacturer Type Capacity 230V DEMETEC GmbH IPs630K 630 VA 110V Tsi Power Corporation ILC 1000 1000W 7 5 Laser Source Laser Specification ICG excitation Diod3e Laser 790nm Laser Class 1 IR reflectance Diode Laser 820nm Laser Class 1 FA excitation and blue reflectance Solid state Laser 488nm Laser Class 1 ...

Page 46: ... x15 Digitized Image Size Pixels 1536x1536 1024x1024 768x768 Max Image Frequency 5 Hz 7 Hz 9 Hz Scan Time Image 96ms to192 ms Digital Resolution 5µm pixel Z Scan Depth Max 8mm High Speed Mode Scan Size 30 x30 20 x20 15 x15 Digitized Image Size Pixels 768x768 512x512 384x384 Max Image Frequency single 9Hz 12 5Hz 16Hz Max Image Frequency pairs 5Hz 7Hz 9Hz Scan Time Image 48ms to 96ms Digital Resolut...

Page 47: ...00 pixels required the acquisition software will not start up with a smaller resolution 7 8 Service Maintenance and Cleaning Please be aware that authorized service personnel only can do Service and Repair opera tions of the HRA2 So do not open the device You will lose the warranty If the device fails please call your local distributor or the Heidelberg Engineering support department The Heidelber...

Page 48: ...S 000010 Manufactured March 03 Heidelberg Engineering GmbH 69221 Dossenheim Germany Serial No HRA2 SLU 000010 Manufactured March 03 Heidelberg Engineering GmbH 69221 Dossenheim Germany Model PS410 100 240 V 50 60 Hz 70 W 230 V 2x T 1 25 A 250 V 110 V 2x T 2 50 A 250 V Type Label on the Power Supply Laser unit Serial number Camera Serial number Headrest Serial number Touch panel Serial number Power...

Page 49: ...abel on the Power Supply Laser unit CFR compliance Label on the camera WARNING LASER BEAM CLASS 3B WHEN OPEN AVOID DIRECT EXPOSURE TO BEAM Heidelberg Retina Angiograph 2 HRA 2 WITH RESPECT TO ELECTRIC SHOCK FIRE AND MECHANICAL HAZARDS ONLY IN ACCORDANCE WITH UL2601 1 CAN CSA C22 2 No 601 1 and IEC 60825 XXXX Laser Class 1 label on the Camera LASER CLASS 1 ...

Page 50: ...0 Disposal Only Heidelberg Engineering shall dispose the device R A Reflexion Mode Filter on the Camera Angiography Mode Filter on the Camera Sensitivity ad justment Touch Screen Focus Function on the Camera ...

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