Podcast
Questions and Answers
What is the purpose of using a flood field or sheet phantom in a conventional gamma camera?
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?
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?
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?
How are non-uniformities in photomultiplier performance typically addressed?
What is the purpose of performing background radiation checks on a gamma camera?
What is the purpose of performing background radiation checks on a gamma camera?
What would be indicative of contamination on the crystal or camera head in a gamma camera?
What would be indicative of contamination on the crystal or camera head in a gamma camera?
Flashcards
Flood Field/Sheet Phantom use?
Flood Field/Sheet Phantom use?
To assess the uniformity of detector response to a uniform radiation field.
Common flood source?
Common flood source?
Cobalt-57 (⁵⁷Co) is used because of its long half-life and suitable gamma energy.
Defective photomultiplier sign?
Defective photomultiplier sign?
Reduced counts in a specific area of the flood field image.
Addressing PMT non-uniformities?
Addressing PMT non-uniformities?
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Background radiation checks?
Background radiation checks?
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Contamination Sign?
Contamination Sign?
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