Collimator Inspection

1 Overview

You will run one pass of the Collimator Application Test and inspect the tube port for contamination or debris while the filters are moving.

This test positions the Cams and filter to the selected positions for the test duration.

2 Procedures

caution Lead Hazard Lead present in the collimator. Direct contact with the lead may cause injury. Wear protective gloves.

1. From the Common Service Desktop, select Diagnostics, Collimator Functional.

2. Setup (see Figure 1).

   • Acquisition Aperture: click Select All

   • Filter: click Select All

   • Test Duration: Select 120 (You can select longer, if desired)

   • Gantry Params

     • Gantry: Position

     • Speed: N/A

     • Position: 180

   The test runs in continuous modes, which helps detect intermittent operating conditions. This is a means to visually validate the aperture and filter positions, and validate the operation of the collimator.

3. Inspection

   1. Look for highlighted fields on the screen that indicate the cam or filter did not make it to position.

   2. Check the log for additional information if errors occur.

   3. While the test is running:

      1. Visually check the collimator protective window for nicks, scratches, and signs of fluid leaks (see Figure 2).

      2. Using a flashlight, look down through the collimator opening, to inspect for debris or oil (see Figure 3).

Figure 1. Collimator Application Position Test Screen

Figure 2. Collimator Filters

Figure 3. Collimator Copper Filter