What Are the Different Types of Nuclear Medicine Cameras?
Gamma cameras, also called scintillation cameras, are used to image radiating nuclides that release gamma radiation. Many applications in early drug development and nuclear medical imaging can be used to analyze the distribution of humans and radioactive markers.
- Chinese name
- Gamma camera
- Gamma cameras, also called scintillation cameras, are used to image radiating nuclides that release gamma radiation. Many applications in early drug development and nuclear medical imaging can be used to analyze the distribution of humans and radioactive markers.
- status quo
- In recent years, the rapid development of gamma cameras has made nuclear medicine a big step forward. It is a fixed instrument that allows imaging of static and dynamic radionuclide distributions. The basic gamma camera consists of the following components: a collimator, a position-sensitive gamma-ray detector, electronic circuits for calculating position coordinates, a pulse height analyzer, and a display system. Only two different types of gamma cameras have been successfully made into commercial products and are routinely used in clinical nuclear medicine. These are Anger scintillation cameras and polycrystalline scintillation cameras. The most successful one is the anger flash camera, which is currently produced by about a dozen companies around the world. Polycrystalline scintillation cameras are produced by only one company. A third type of flicker camera has recently appeared in Europe, which uses an image intensifier as a detector of both position and flicker intensity. At present, the most promising are inflatable multi-wire proportional counters and semiconductor gamma cameras.
- The main performance parameters of a gamma camera are: spatial resolution, sensitivity, uniformity, position linearity, energy resolution, and count rate linearity.
- Due to the large size of the current gamma camera, it is generally suitable for working in a fixed place in a hospital.The observation range of this fixed gamma camera is from 25 cm to 40 cm, which can work at 500KeV, and its weight is about About 1500 kg. Recently, a portable gamma camera has appeared, with a positive basin of about 350-750 kg, which is suitable for critical patient care and nuclear medicine clinical. The multi-line proportional chamber, which was originally used for high-energy physics experiments, has been studied for use in gamma cameras. Its sensitivity at 140KeV is about 40% of the anger camera. Space and energy resolution is better than a scintillation camera. The system may have a higher counting rate.
- Semiconductor cameras have also been successfully trial-produced, and have very high spatial and energy resolutions. However, at present, such cameras are too expensive and have not been widely adopted in clinical practice. [1]