Del Medical EPEX Omniflex IV, Руководство по обслуживанию

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EPEX/Omniflex IV System Service Manual
Adjustments and Calibration 4-29
Verifying VSID X-ray Field Centered to the DirectRay Detector Center
To verify VSID X-ray field centered to DirectRay Detector center:
Step Action
1 Using the measure function in DRIVEL, measure from the central
beam spot on the beam alignment tool to all four edges of the black
X-ray field.
Note: The central beam should be centered so that the distances to
all four sides are equal. It is not necessary at this time to align the
X-ray field to the Bucky.
2 Initiate exposure.
3 Accept the image in DRIVEL.
4 Interactively adjust the location of the X-ray field until it is centered
in portrait and landscape.
Note: 21CFR allows a 2% error in this alignment. In order to ensure
image quality and correct alignment, it is suggested that a 1% error
or better (1 cm total at 100 cm) be achieved.