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Parts Of A Gamma Camera. Anger position network 5. The major components are a collimator a large-area NaI Tl scintillation crystal a light guide and an array of PM tubes. Gamma cameras can be used to plan a course of treatment to attack cancers. Photon undergoes one or more Compton interactions The spectrum has a peak photopeak that corresponds to the maximum gamma photon energy for 99m Tc this is 140 keV.
Computer to build up the image from many detection events Operation. Gamma Camera contains 37 -91 PMT. There are three major components in a gamma camera. The crystal has the ability to stop incoming gamma rays and convert part of the deposited energy into scintillations. The major components are a collimator a large-area NaI Tl scintillation crystal a light guide and an array of PM tubes. Digitizer ADCs 7.
It detects and amplifies the electrons that are produced by the photocathode.
Parts B and D can be used together for the purchase of a gamma camera with PET capability. En A unit of preliminary amplification for scintillation gamma- chamber is described. A crystal of sodium iodide fluoresces when a gamma ray interacts with one of its orbital electrons promoting it to a higher energy level. Photon undergoes one or more Compton interactions The spectrum has a peak photopeak that corresponds to the maximum gamma photon energy for 99m Tc this is 140 keV. The resulting image is a series of lines corresponding to the. Scintillation crystals in a gamma camera are typically 10 to 25 inches in diameter or rectangular and are 14 to 1 inch thick Like the screens that are used in projection radiography thicker crystals stop more photons than thinner crystals but they also have poorer resolution.