What does a sodium iodide crystal do?
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What does a sodium iodide crystal do?
Sodium Iodide (Tl) – NaI(Tl) – is a well established and the most extensively used scintillator. It is used for detecting gamma rays of low and intermediate energies. It has a high level of optical output and relatively inexpensive. It is available in both single crystal and polycrystalline formats.
What crystals are used in gamma cameras?
Sodium iodide
Sodium iodide (NaI) is the most common crystal used in gamma cameras.
What does a scintillation crystal do in a gamma camera?
Medical imaging The gamma camera is based on a large scintillation crystal that transduces the energy of a γ-ray into light.
What method of detecting radiation uses sodium iodide crystals containing small amount of thallium iodide?
Scintillation Detectors
8.2 Scintillation Detectors. A scintillation detector contains a scintillator crystal optically coupled to a photomultiplier tube (PMT). The most common type of scintillator crystal consists of sodium iodide (i.e., NaI) activated with a small amount of thallium (i.e., NaI(Tl) detector).
What type of crystal is sodium iodide?
It is available in single crystal form or the more rugged polycrystalline form (used in high vibration environments, e.g. wireline logging in the oil industry)….Parameter.
| Chemical formula | NaI |
|---|---|
| Appearance | white solid deliquescent |
| Crystal structure | Halite, cF8 |
| Space group | Fm3m, No. 225 |
| Lattice constant | a = 0.6462 nm |
What type of EM wave is gamma detector?
Gamma-ray detectors typically contain densely packed crystal blocks. As gamma rays pass through, they collide with electrons in the crystal. This process is called Compton scattering, wherein a gamma ray strikes an electron and loses energy, similar to what happens when a cue ball strikes an eight ball.
Why is a gamma camera used?
The gamma camera, also called scintillation camera, is the most commonly used imaging device in nuclear medicine. It simultaneously detects radiation from the entire FOV and enables the acquisition of dynamic as well as static images of the area of interest in the human body [67].
What is gamma ray imaging used for?
Medical uses Imaging with gamma rays is used in nuclear medicine, as well as in court medicine. This technique can be used for both diagnosis and prevention. Imaging with gamma rays has a wide range of functions, such as: Tumor imaging.
Why gamma camera is also called scintillation camera?
How does gamma ray camera work?
The Nuclear Camera (or otherwise known as a gamma camera) uses special imaging techniques called planar dynamic or single-photon emission-computed tomography (SPECT) to detect radioactive energy that is emitted from the patient’s body and convert it into an image. The gamma camera itself does not emit any radiation.
What is Nal detector?
Sodium Iodide Detectors Of all available scintillators, NaI(Tl) is the most extensively used. The material has an unequalled high light output and an excellent match of the emission spectrum to the sensitivity of photomultiplier tubes, resulting in very good energy resolution detectors.