3E
ABS Calibration
CPI Canada Inc.
Page 3E-10
Rev. D Millenia / Indico 100 Series Service Manual Ch # 740904-07
3E.3.0 ABS
SETUP
Before the ABS system can be calibrated, the imaging system must be functional and properly set up.
Please verify the following:
•
Image intensifier and its power supply are functional.
•
TV camera calibrated for this application.
•
All beam attenuating devices are in place.
•
Table top is in position.
•
Fluoro grid is in path of X-ray beam.
•
Imaging system is in the operational position.
•
Imaging collimator functional.
•
Collimator opening varies as S.I.D. is changed. (S.I.D. = source-image distance)
•
Collimator opening varies as the image intensifier’s MAG mode switch is changed.
•
The ABS pickup device (as per the previous section) must be installed and functional.
•
Sufficient filters are added to the X-ray tube to provide the required HVL.
•
The fluoro imaging and receptor devices have been programmed. Reference chapter-3, section C
•
kVp and mA must be in calibration. Reference chapter-4
CAUTION:
PROCEDURES IN THE FOLLOWING SECTIONS REQUIRE THE PRODUCTION OF X-RAYS.
IT IS THE RESPONSIBILITY OF THE INSTALLER TO FOLLOW ESTABLISHED GUIDELINES
TO PROTECT ALL PERSONNEL FROM RADIATION EXPOSURE.
3E.3.1 Dose Limits
This procedure sets the maximum kV allowed for each mA step in both manual and ABS mode of
operation.
CAUTION:
MAXIMUM INPUT DOSE VALUE IS USUALLY GOVERNED BY LOCAL, STATE OR COUNTRY
REGULATIONS. THESE LIMITS MUST BE DETERMINED IN ADVANCE OF ATTEMPTING
DOSE LIMITS SETUP, AND ADHERED TO DURING GENERATOR CALIBRATION.
NOTE:
REFER TO LOCAL REGULATIONS TO DETERMINE THE REQUIRED DISTANCE BETWEEN
THE FOCAL SPOT AND RADIATION DETECTOR. THIS FOCAL SPOT TO DETECTOR
DISTANCE MUST BE USED WHEN SETTING UP THE RADIATION DETECTOR FOR DOSE
LIMITS CALIBRATION.
