The core tip of the electronic enthusiast network : Nuclear medicine is an emerging discipline with many advanced and superior features. Nuclear medicine imaging equipment is developing at a rapid pace with the discipline of nuclear medicine. Nuclear medicine imaging equipment is symbiotic with nuclear medicine itself. It permeates the entire process of nuclear medicine treatment, whether it is a single-function measuring instrument in the past or a comprehensive large-scale detector now, as well as various newly developed nuclear medicine imaging equipment. Promote the development of nuclear medicine. Nuclear medicine imaging equipment refers to equipment that detects and displays images of radionuclide drugs (commonly known as isotope drugs) in the body. Nuclear medicine imaging is a method of imaging organs or diseased tissues based on the difference in radioactive concentration between the internal and external organs or between normal tissues and diseased tissues. Compared with CT and MRI, nuclear medicine imaging examination ECT can detect and diagnose certain diseases earlier. Nuclear medical imaging belongs to functional imaging, namely radionuclide imaging.
Classification and characteristics of first nuclear medical imaging equipment
(1) γ camera
1 γ camera composition:
(1) Scintillation probe: including collimator, scintillation detector, photomultiplier tube, etc.
(2) Electronic circuit: including preamplifier, single pulse height analyzer, correction circuit, etc.
(3) Display device: oscilloscope, camera, etc.
(4) γ camera additional equipment.
2 Features:
(1) Through continuous imaging, tracking and recording radioactive drugs through a visceral morphology and function for dynamic research;
(2) Because the examination time is relatively short, convenient and simple, it is especially suitable for children and critically ill patients;
(3) Due to the rapid imaging, it is easy to observe in multiple positions and positions;
(4) Through corresponding processing of the image, data or parameters helpful for diagnosis can be obtained.
(2) Single-photon tomography equipment (SPECT)
1 Imaging principle:
Using a gamma camera around the area of ​​the body of interest for diagnosis, collect and count the gamma photons emitted at various angles, and then use the image reconstruction method used in X-CT to obtain the radiopharmaceutical concentration Distribution, you can get multi-level tomographic images or three-dimensional stereoscopic images.
At present, the energy measurement range of SPECT nuclear medicine imaging equipment is 50 ~ 600keV, and the spatial resolution is 6 ~ 11mm.
2 The difference with X-CT:
(1) The image is rough and the spatial resolution is low.
(2) It belongs to emission tomography;
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