The quality of gamma-camera PET imaging is lower, and the scans take longer to acquire. It is also possible to acquire PET images using a conventional dual-head gamma camera fitted with a coincidence detector. PET imaging is best performed using a dedicated PET scanner. Regional tracer uptake in various anatomic structures can be visualized and relatively quantified in terms of injected positron emitter within a PET scan. PET scanning does this by using radiolabelled molecular probes that have different rates of uptake depending on the type and function of tissue involved. Since PET is capable of detecting biochemical processes as well as expression of some proteins, PET can provide molecular-level information much before any anatomic changes are visible. ![]() ![]() Physiological processes lead to anatomical changes in the body. This approach allows research studies to reduce the sample size needed while increasing the statistical quality of its results. It allows repeated investigations into the same subjects over time, where subjects can act as their own control and substantially reduces the numbers of animals required for a given study. PET is also used in pre-clinical studies using animals. PET is a valuable research tool to learn and enhance our knowledge of the normal human brain, heart function, and support drug development. It is used heavily in the imaging of tumors and the search for metastases within the field of clinical oncology, and for the clinical diagnosis of certain diffuse brain diseases such as those causing various types of dementias. PET is both a medical and research tool used in pre-clinical and clinical settings. PET/CT-System with 16-slice CT the ceiling mounted device is an injection pump for CT contrast agent One of the disadvantages of a PET scanner is its high initial cost and ongoing operating costs. PET scan images can be reconstructed using a CT scan performed using one scanner during the same session. PET scanners can incorporate a CT scanner and are known as PET-CT scanners. These gamma rays are detected by gamma cameras to form a three-dimensional image, in a similar way that an X-ray image is captured. When the radiopharmaceutical undergoes beta plus decay, a positron is emitted, and when the positron collides with an ordinary electron, the two particles annihilate and gamma rays are emitted. A radiopharmaceutical - a radioisotope attached to a drug - is injected into the body as a tracer. PET is a common imaging technique, a medical scintillography technique used in nuclear medicine. Is widely used for detecting bone formation, and oxygen-15 is sometimes used to measure blood flow. FDG is commonly used to detect cancer, NaF 18 Different tracers are used for various imaging purposes, depending on the target process within the body. Positron emission tomography ( PET) is a functional imaging technique that uses radioactive substances known as radiotracers to visualize and measure changes in metabolic processes, and in other physiological activities including blood flow, regional chemical composition, and absorption.
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