Gamma cameras: components and systems - University of Washington scintillation crystals in a gamma camera are typically 10 to 25 inches in diameter (or rectangular) and are 1 4 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
The Gamma Camera: Basic Principles - Radiology Key Most general-purpose gamma cameras have crystal thicknesses of approximately 9 5 mm For lower-energy γ emitters, such as 99m Tc and 201 Tl, however, detection efficiency is adequate even with 6-mm-thick detector crystals
Scintillation (Gamma) Camera - Oncology Medical Physics The Anger camera features a single scintillation crystal coupled to multiple photomultiplier tubes which are able to encode the location of the radiation interaction with the crystal
Gamma Camera - an overview | ScienceDirect Topics The gamma camera or SPECT camera is a camera that is able to detect scintillations (flashes of light) produced when gamma rays, resulting from radioactive decay of single photon emitting radioisotopes, interact with a sodium iodide crystal at the front of the camera
Scintillator (gamma camera) - Radiopaedia. org The scintillator is the component of a gamma camera which receives the gamma rays emitted from a radionuclide in a nuclear medicine scan and converts it to visible light photons It is located just behind the collimator device
Gamma camera - Wikipedia The system accumulates events, or counts, of gamma photons that are absorbed by the crystal in the camera Usually a large flat crystal of sodium iodide with thallium doping NaI (Tl) in a light-sealed housing is used
Cyberphysics - Technetium 99m A crystal of sodium iodide fluoresces when a gamma ray interacts with one of its orbital electrons, promoting it to a higher energy level On its return to ground state a photon is emitted
Gamma camera - Radiology Cafe The gamma photon energy absorbed by the scintillation crystal depends on its interaction with that photon which results in a spectrum of Z values All energy absorbed: gamma photon interacts with crystal via photoelectric effect
INTERACTIONS OF GAMMAS - High Energy Physics cintillation detector In a scintillation detector the gamma ray passes into an organic or inorganic crystal where it interacts with the atoms of the crystal by one of he above interactions The result of these interactions are the production of charged particles (electrons and gammas
The Secrets of Imaging: How Does a Gamma Camera Work? The core components of a gamma camera include a collimator, scintillation crystals, photomultiplier tubes, and an imaging processor The collimator filters out gamma rays that are not coming from the right angle, ensuring that only the intended signals reach the scintillation crystals