Appendix B Calibration (DiRex System)
HF Series X-ray Generators - Service Manual Revision W
Quantum Medical Imaging, LLC B-49
• Wall 40" - Used when the operator selects wall receptor at 40 inch
source-to-image distance (SID)
• Table 40" - Used when the operator selects table receptor at 40 inch
source-to-image distance (SID)
On generators equipped with "Universal" type AEC (AEC Board A11 AY40-
027S installed), two additional image receptors and their corresponding film/
screens (default names are "WALL2" and "AUX") may also be configured sim-
ilar to those listed above. It is important to note that each different type of
film/screen combination used with the receptors be calibrated in accordance
with the AEC Calibration procedures described in this chapter.
Throughout AEC calibration, the film/screen being calibrated is displayed on
every AEC calibration screen at the end of the top field. Note that the sample
AEC calibration screens show "Wall40" in the instructions that follow; this is
because the "Wall40" film screen was selected. The screens will actually
reflect whichever of the available nine film screens you choose.
When calibrating AEC using a wall stand mounted receptor, ensure that the x-
ray beam is perpendicular to image receptor and that the correct ion chamber
detector(s) is selected.
IMPORTANT! Use the same configuration of
bucky, grid, ion chamber and film cassette/screen
that will be used with the "Film/Screen" being
calibrated.
To Next Page
Loading...