Del Medical EPEX Omniflex IV, Руководство по обслуживанию

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EPEX/Omniflex IV System Service Manual
4-34 Adjustments and Calibration
Checking the Size of the X-ray Field to Collimator Indicated Size Full
Field
To check the size of the X-ray field to Collimator indicated size full
field:
Checking the Size of the X-ray Field to Collimator Indicated Size
To check the size of the X-ray field to Collimator indicated size:
Step Action
1 Set the Collimator indicated size to 43 x 35 cm at 100 cm SID using
the Auto function.
2 Turn the Collimator to a 45° angle to the DirectRay Detector.
Note: This is done so that you will be able to see a field size greater
than the DirectRay Detector size.
3 Take an exposure at 70 kVp and 8 mAs.
4 Accept the image.
5 View the image in DRIVEL.
6 Using the measure function, measure the size of the X-ray field.
Note: The measurement should be set to 1% greater than indicated
±0.5%. This accuracy is to ensure full coverage of the DirectRay
Detector.
7 If this measurement is not correct, refer to the OTC or Collimator
service manuals that came with the system for the adjustments.
Step Action
1 Set the Collimator blades to 18 x 14 indicated on the Collimator at
100 cm.
Note: No 45° angle is necessary for this procedure.
2 Make an exposure at 70 kVp and 8 mAs.
3 Accept the image.
4 View the image in DRIVEL.
5 Using the measure function, measure the size of the X-ray field.
Note: The measurement should be set to ±2% of SID.
6 If this measurement is not correct, refer to the OTC or Collimator
service manuals that came with the system for the adjustments.