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A gamma camera is a nuclear medicine imaging device that detects radiation from a radiotracer inside the body. The camera itself does not produce the radiation used for the scan. After the tracer is given, the camera detects gamma rays and a computer creates images of organ or tissue activity. Gamma cameras are used in tests that show function, blood flow, tracer uptake, or drainage patterns.
read more about gamma camera ...A small amount of radiotracer is injected, swallowed, or inhaled, depending on the exam. The tracer travels to the target organ or tissue and gives off gamma rays. The camera heads detect those signals and convert them into images. Some systems rotate around the body to create SPECT images, which show activity in slices or 3D views.
A gamma camera can be used for bone scans, thyroid scans, heart perfusion scans, kidney scans, gallbladder scans, lung scans, and infection or inflammation imaging. It can help show how an organ works rather than only what it looks like. The scan type depends on the tracer and clinical question. A nuclear medicine physician reviews the images with the patient's history and other test results.
You can be asked to wait after the tracer is given so it can move through the body. During imaging, you lie still while the camera takes pictures from one or more angles. The camera can come close to the body, but it should not touch or hurt you. Some exams take minutes, while others include delayed images later the same day or on another day.
The amount of radiotracer is selected for the exam and leaves the body over time. Drinking fluids after the scan can help clear some tracers if the care team says it is safe. Tell the care team about pregnancy, breastfeeding, allergies, kidney problems, or trouble lying still. Gamma camera results can be affected by motion, timing, recent tests, medicines, or tracer distribution.
No. The camera detects radiation coming from the radiotracer in your body. The tracer is the source of the signal used to make images.
No. Both are nuclear medicine imaging tools, but they use different tracers and detection methods. PET scanners detect positron-related signals, while gamma cameras detect gamma rays.
Movement can blur the images and make them harder to read. Staying still helps the camera collect a clearer signal from the tracer.
Timing depends on the exam type and tracer used. Some scans are short, while others need waiting time or delayed imaging after the tracer moves through the body.
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