6 Questions
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?
Through automatic compensation during image data acquisition.
What is the purpose of performing background radiation checks on a gamma camera?
To identify contamination of the gamma camera or its collimator.
What would be indicative of contamination on the crystal or camera head in a gamma camera?
A high reading obtained whatever the camera orientation.
Learn about the uniformity of detector response in a gamma camera, how to check it using a flood field or sheet phantom, and how to identify defects in the image. This quiz is essential for medical imaging professionals and students. Understand the principles of gamma camera functioning and troubleshooting.
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