myocardial perfusion imaging
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the production of diagnostic images, e.g., radiography, ultrasonography, or scintigraphy.
digital subtraction imaging a technique in radiography in which electronic subtraction allows the visualization of individual images; see also digital subtraction angiography.
electrostatic imaging a method of visualizing deep structures of the body, in which an electron beam is passed through the patient and the emerging beam strikes an electrostatically charged plate, dissipating the charge according to the strength of the beam. A film is then made from the plate.
gated cardiac blood pool imaging equilibrium radionuclide angiocardiography.
horizontal beam imaging a grid positioning technique in radiology in which the grid cassette is positioned with its lead lines perpendicular to the floor.
hot spot imaging (infarct avid imaging) infarct avid scintigraphy.
magnetic resonance imaging see magnetic resonance imaging.
myocardial perfusion imaging myocardial perfusion scintigraphy.
myocardial perfusion imagingA technique in which the regional distribution of blood throughout the myocardium, is determined by injecting a radiopharmaceutical–eg, 201Tl. or 99mTc and capturing images with a gamma–scintillation camera; by determining blood and oxygen distribution, MPI informs on the hemodynamics and functional effect of coronary arterial stenosis
myocardial perfusion imagingAbbreviation: MPI
The use of radioactive isotopes, such as 201Tl or 99mTc sestamibi, to gauge the blood supply and viability of the regions or walls of the heart. MPI is frequently used to assess patients with coronary artery disease, often in conjunction with exercise tolerance tests. A patient with a coronary artery that is almost totally blocked may take up only a small quantity of radioisotope during exercise but much more of the tracer after several hours of rest. By contrast, heart muscle that is fed by a completely blocked artery will take up no radioisotope either during or after exercise.
See also: imaging