Siemens MAMMOMAT NovationDR, Installation Instructions Manual, Page: 40 / 95

Calibrating the AEC
February 5, 2004
4-3
Note that the window image above shows the default configuration of the tool:
•
Target/filter setting is Mo/Mo
•
Units are set to Gy/mGy
•
AGD is set to 1.5 mGy
•
No procedure active
Viewing Version Information and Exiting the Tool
To view the tool’s version and build information, open the Help menu and
choose About . The About dialog box displays.
To exit the tool, open the File menu and choose Quit .
Main Window Functions and Options
The AEC Calibration Tool window’s functions and options are described in
Table 4-1.
Table 4-1. AEC Calibration Tool Functions and Options
Function/Option Description
Procedure Options You choose what procedure you want to perform from these three options. Only one can be
selected at a time. When the tool starts, no procedure is selected. You must select one of the
three procedures to continue.
•
Determine HVL.
Select this procedure to determine the Half Value Layer (HVL) of the X-ray
Generator for a given target/ fi lter combination. For the procedure for determining the HVL,
refer to “Determining the Half Value Layer (HVL)” on page 4-5.
•
Determine ESE.
Select this procedure to determine the Entrance Skin Exposure (ESE).
This step may be performed without determining the HVL of the X-ray Generator. However,
a valid HVL value must be known. For the procedure for determining the ESE, refer to
“Determining the Entrance Skin Exposure (ESE)” on page 4-8.
•
Generate Goal.
Select this procedure to generate the goal table for the selected target/ fi lter
combination. This step may be performed without determining the HVL of the X-ray
Generator or the ESE. However, a valid mAs value must be known. For the procedure for
generating the goal, refer to “Generating the Goal Image” on page 4-11.
Target/Filter The desired target/ fi lter combination. The goal table will be named to match (Mo/Mo is
goaltab1, Mo/Rh is goaltab2, W/Rh is goaltab3). Make sure that the Generator setting matches
this selection. Since this selection determines future instructions and calculations, this selection
will be disabled once the
fi rst HVL exposure is taken.