Sedecal X - 4.4.3 X-Ray Field and Image Receptor Centering

Universal Radiographic System
Service Manual
SM-0524R4
32
4.4.3 CENTERING OF X-RAY FIELD AND IMAGE RECEPTOR
The error between centers of the X-ray Field and the Image Receptor should
not be greater than 2% of the SID. (for SID 1m = 2 cm tolerance).
CENTER OF THE X--RAY FILM
CENTER OF THE IMAGE
DEVIATION
If the deviation is greater than 2% of SID, perform the following procedure:
1. Check on the processed film the correction required for centering the
X-ray Field with the Image Receptor. Adjustments will be performed as
the same way described for Perpendicularity correction, so only re-adjust
it if really is necessary.
Centering adjustments may affect to perpendicularity
corrections.
2. Repeat exposure and check centering until the result is satisfactory
(centers position are within tolerance).