A diagnostic examination wherein a radioactive contrast substance is administered intravenously and captured through photography to visualize internal blood vessels, organs, and tissues.
A diagnostic method relying on identifying radiation emanating from radioactive substances administered into the body. Various substances are absorbed at varying levels by distinct tissues, enabling the examination of specific organs. For instance, iodine is predominantly absorbed by the thyroid gland. By associating a radioactive marker (radionuclide) with a sample of iodine, the thyroid gland’s iodine uptake can be tracked to assess its performance.
The radionuclide is ingested or introduced into the bloodstream and subsequently collects within the intended organ. This organ emits gamma radiation, which is captured by a gamma camera to generate an image.
Using a computer-controlled gamma camera that revolves around the patient, it’s possible to capture cross-sectional images, often referred to as “slices.” This specialized radionuclide scanning technique is labeled SPECT (single photon emission computed tomography). Additionally, dynamic images can be obtained through computer assistance; a sequence of images is recorded right after the administration of the radionuclide.
Radionuclide scanning possesses the ability to identify certain disorders in their early phases, preceding the impact on an organ’s structure, which sets it apart from other imaging methods. Moreover, this technique is employed to pinpoint conditions that exclusively influence an organ’s function. Dynamic images can furnish insights into blood circulation, heart wall motion, urinary flow within the kidneys, and the movement of bile through the liver.
Radionuclide scanning is a secure procedure, necessitating only tiny radiation doses that are expelled from the body within hours. These radionuclides pose virtually no risk of toxicity or hypersensitivity.