Check The H & D Dose Settings For Mo/Rh And W/Rh - Siemens MAMMOMAT Novation DR Installation Manual

Checking dose settings
Check the H & D dose settings for Mo/Rh and W/Rh.
If the Mo/Mo AEC does values for H & D are within the specification, proceed as follows:
1.
2.
3.
Tab. 2
4.
5.
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Mount the Collimator Mounted Plexi Phantom.
Select the appropriate exposure parameters according to the table and start an
exposure.
Select the anode/filter combination according to the table and set the mAs (control
console) as close as possible to the H & D mAs values (Mo/Mo) that you have
measured in step 2.
Display the image with the syngo Image Viewer. To do so click on the Viewing
tabcard, load the image with the Patient -> Browser and select Tools -> Rect-
angle. Draw an area of approximately 1 sq.cm and measure the pixel mean
value.
Add the result to the table.
Anode /
AEC
Filter
H
Mo/Rh
D
H
W/Rh
D
Checking the H & D dose settings for Mo/Rh and W/Rh
The Mo/Rh and W/Rh pixel values must be as close as possible to the Mo/Mo
pixel values (see table at step 2).
The deviation must not exceed +/- 20 %.
If the H & D dose settings have to be adjusted, proceed with Chapter 8 "Adjust the
H and D Settings" and repeat the H & D dose checks for Mo/Rh and W/Rh again.
Record the measured values in the "Startup Protocol" on Page 11 - 1 .
kV Pixel value
28 kV
28 kV
28 kV
28 kV
SPB7-250.815.02
Rev. 02 09.04
MAMMOMAT Novation
Page 7 of 10
CS SD 24
8 - 7
8
DR
System