SPECT

SPECT or Single Photon Emission Computed Tomography is a diagnostic tool that that uses gamma camera to collect gamma rays that are emitted from the patient. Radioactive isotope is administered to the patient either as injection or inhalation or ingested liquid. SPECT imaging helps acquire multiple images from multiple angles. The gamma camera is rotated around the patient. Dual-headed cameras can help in accelerating the test. Often triple-headed cameras are also used. SPECT is particularly useful in imaging of tumors, bones, thyroid and infections. Cardial imaging and brain imaging provide critical information about localized functions. MPI (Myocardial perfusion imaging) is an important cardiac stress test. SPECT images allow diagnosis of ischemic heart disease. This test is comparable to stress echocardiography. SPECT imaging of the brain aids in distinguishing Alzheimer's disease from other vascular dementia. Nearly 30 or more images are taken of the specific body area that is being viewed. SPECT scanning is time consuming.