Gamma camera is considered as one of the most important devices used in the field of nuclear medicine. It works to produce functional images of the body part which play a major role in the diagnostic process.
GAMMA CAMERA MACHIINE
RADIO PHARMACEUTICAL USED:
Patient is injected with a certain substance called "radio pharmaceutical".
COMPONENT OF GAMMA CAMERA:
This radio pharmaceutical interacts with the patient target organ resulting in gamma rays production. The emitted gamma rays are detected by the gamma camera passing through its components. These components are:
• Collimator
• NaI(Tl) crystal
• Light Guide (optical coupling)
• PM-Tube array
• Pre-amplifier
• Position logic circuits (differential&addition etc.)
• Amplifier (gain control etc)
• Pulse height analyzer
• Display (Cathode Ray Tube etc).
EXPLAINATION OF COMPONENTS:
1) COLLIMATOR:Made of a large number of small holes drilled in a plate of lead. The holes accept only the gamma rays that are traveling along their direction, while the angled ones get absorbed by the lead. It comes with different types.
STRUCTURE OF COLLIMATOR
HOW COLLIMATOR WORK
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