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/filter 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/filter
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/filter 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 first HVL exposure is taken.
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