Revision W HF Series X-ray Generators - Service Manual
A-8 Quantum Medical Imaging, LLC
Appendix A AEC Calibration with DR or CR Film Plate
AEC Calibration Instructions - One Ion Chamber Per Panel
The following procedure is used to perform AEC calibration of generators
used with a single or dual receptor panel, integrated or non-integrated, and
each of the receptor panels is only used with one ion chamber. Use this pro-
cedure for calibrating all CR Film Plate systems.
1. Verify system is configured correctly per "CANON DR SYSTEM CON-
FIGURATION INSTRUCTIONS" procedure provided in this appendix.
2. Place a CR film plate in the tray (if CR system) and collimate down to
film size.
3. If not already done so, access the AEC Calibration Menu (refer to
Chapter 3).
4. Press the key next to the Film/Screen Combination field (upper
left field) to select a film/screen combination to calibrate (e.g.,
"TABLE 40").
5. The FILM SPEED field shows the default film speed setting for the
selected film/screen combination (400). If not, press the up or down
keys next to the FILM SPEED field until 400 film speed setting is
displayed.
6. When film/screen combination name and film speed settings are cor-
rect, press the key next to the AEC OD Calibration field to proceed
with AEC Calibration. The AEC Optical Density Calibration Screen is
displayed:
Figure A-2. AEC Optical Density Calibration Screen
7. This screen is used to calibrate the digital receptor or CR film plate to
a user defined optical density setting (e.g., 1.3). This is accom-
plished by comparing the digital receptor or CR film plate’s specified
sensitivity values (refer to manufacturer’s installation and calibration
documentation supplied with CR film plate) with the AEC REF value
appearing on AEC Optical Density Calibration screen shown above.
BASE
OPTICAL
DENSITY
SELECT KEYS
AEC REF
ADJUSTMENT
KEYS
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