GE Senographe DS, Руководство пользователя

Страница: 711 / 1810

GE Healthcare Senographe DS
Revision 1 Service Information and Procedures Class A 2385072-16-8EN
Job Card ELE A039 - Compliance with Germany for Detector Dose
Page no. 711 Chapter 7
JC-ELE-A-039.fm
Job Card ELE A039 - Compliance with Germany for Detector Dose Chapter 7
1 SUPPLIES
None
2 TOOLS
Set of acrylic plates (stack 4 of the 10 mm plates and the 5 mm plate to yield a thickness of 45 mm)
3 REQUIRED EFFORT
Personnel: 1 Field Engineer
Time: 10 minutes
4 SAFETY PRECAUTIONS
The procedures in this Job Card produce X-rays. Ensure that you take appropriate precautions when
operating with X-rays (for example, stay behind the radiation screen during an X-ray exposure).
5 PREREQUISITES
Activate the display of exposure parameters: select SETUP/GENE/INSTAL/GENE/CONFIG/DISP/YES
on the X-ray Console.
Deactivate the auto decompression: select
MEDICAL/DECOMP/DECOMP/NO on the X-ray Console.
6 PROCEDURE
6-1 Objective
This procedure ensures that the Senographe system complies with Detector Dose German regulations.
6-2 First Exposure
1. Make one exposure for each AOP mode, with 45 mm thickness of acrylic on the Bucky compressed
at 4 daN. To yield an acrylic thickness of 45 mm, stack 4 of the 10 mm plates and the 5 mm plate.
2. Note the displayed exposure parameters in the following table:
TABLE 1 -
• The radiological thickness must be in the range 4.40 cm to 4.60 cm. If not:
-
Repeat the AOP calibration ( Job Card CAL A051 - AOP Calibration on page 1723 ).
- Repeat steps 1 and 2.
• The composition must be in the range 45% to 55%. If not:
-
Repeat the compression thickness calibration ( Job Card CAL A050 - Compression Thickness
Calibration on page 1721 ).
- Repeat steps 1 and 2.
Increasing mechanical thickness causes a decrease of composition.
AOP mode Spectrum (Target/
Filter, kVp)
mAs Radiological thickness,
cm
Composition:
%
CNT RhRh29
STD RhRh29
Dose RhRh29