Gamma Camera Uniformity Check
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Questions and Answers

What is the purpose of using a flood field or sheet phantom in a conventional gamma camera?

To check the uniformity of the detector response to a uniform field.

What type of radioactive material is commonly used to fill a flood field or sheet phantom?

Cobalt-57 (57Co)

What would be indicative of a defective photomultiplier in a flood field image?

An area of reduced counts in the image.

How are non-uniformities in photomultiplier performance typically addressed?

<p>Through automatic compensation during image data acquisition.</p> Signup and view all the answers

What is the purpose of performing background radiation checks on a gamma camera?

<p>To identify contamination of the gamma camera or its collimator.</p> Signup and view all the answers

What would be indicative of contamination on the crystal or camera head in a gamma camera?

<p>A high reading obtained whatever the camera orientation.</p> Signup and view all the answers

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