Calibrations; Shading Calibration - AGFA CR 30-X Service Manual

DD+DIS150.06E
3

Calibrations

3.1

Shading Calibration

Determine the sensitivity of the scanning system for each pixel of the scan line:
Purpose
A flatfield is scanned. For each pixel a sensitivity factor is stored in an EEPROM
on the PMT.
Perform a shading calibration in following cases:
Use Case

After replacement of the Photomultiplier (PMT) with light collector

After replacement of the optic module

After the laser beam position adjustment

Whenever the PMT or light collector have been removed (e.g. for replacing the
slow scan module)

Whenever stripes in slow scan position are visible, which cannot be removed by
cleaning of the scan line with the cleaning brush
REQUIRED TOOLS:
* The last digit in the spare part number indicates the spare part revision at release of
this document. When ordering, the actual revision of the spare part is delivered.
REQUIRED TIME:
60 minutes
(1) Select the largest available cassette. If the largest available cassette is only a
Full Leg / Full Spine (FLFS) Cassette, use this cassette.
In this case see the special instructions for Shading Calibration with a FLFS
cassette in section 3.1.3.
(2) Open the cassette and check the image plate (IP) for scratches. If no scratches
are visible, select this IP.
(3) Erase the IP.
(4) Mount the Cu-filter below the collimation window at the X-ray device.
The controlled version of this document resides on MedNet. Any printed copy of this document is uncontrolled.
Edition 1, Revision 3
10-2009
1,5 mm Copper Filter*
CM+9 5155 1015 2
DOCUMENT CONTROL NOTE:
CR 30-X
Type 5175 / 100/110
Repair and Service
Adjustments and Calibrations
Agfa Company Confidential
Chapter 3.6 / 29