COB 932 Central Axis

Calibrating the BEBIG COB Plaque

In this tutorial we will create a model of plaque COB 932 from the sample data sheets.

Bring the Plaque window to the front.
Select plaque #1.
The displayed plaque will most likely be whatever your preferred startup plaque is. Whatever plaque is displayed, ignore it! We are going to replace it in the next step.

From the Plaque menu at the top of the screen, select the BEBIG Plaques menu and then the desired model (COB in this case).

The calibration dialog will open automatically. The document window will also open in the background to display the central axis dose profile. Click the Central Axis Measurements tab.

Enter the Serial no. COB 932.
Enter the Plaque file name COB_932.iplq.
Enter the Measured activity 19.0 from the Measurements certificate sheet.
Enter the Assay date 10/31/2011 12:00 PM.
Select Radionuclide ID 106M from the popup menu (the dialog should default to 106M).
Select Central axis protocol 11 point (0.6...10.0) from the popup menu (the dialog should default to this).
Enter the central axis data from the Measurements protocol sheet.
Click the Distribute Activity Uniformly button.
The uncalibrated dose profile should appear as illustrated.

When the nearfield optimization is complete the dialog and dose profile will look like this:

Proceed to Surface Measurements section of the calibration process.

Click on this link to proceed to Surface Measurements section of the calibration process.