| fMRI | functional magnetic resonance imaging |
|---|---|
| GMRI | gated magnetic resonance imaging |
| MRI | machine-readable identifier; magnetic resonance imaging; medical records information; Medical Resear... |
| MRSI | magnetic resonance spectroscopy imaging |
| NMRI | Naval Medical Research Institute; nuclear magnetic resonance imaging |
| ventilation/perfusion ratio | The ratio of alveolar ventilation to simultaneous alveolar capillary blood flow in any part of the lung; because both ventilation and perfusion are expressed per unit volume of tissue and per unit time, which cancel, the units become liters of gas per liter of blood. (05 Mar 2000) |
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| ventilation-perfusion scan | A lung function test, especially useful for pulmonary embolism, employing an inhaled radionuclide for ventilation and an intravenous radionuclide for perfusion; their respective distributions in the lung are recorded scintigraphically. (05 Mar 2000) |
| ventilation perfusion scanning | <investigation, radiology> A nuclear medicine test that involves the inhalation of a radioactive gas and the injection of a radioactive compound into the bloodstream. A special camera measures the radioactive compound and generates a image of the lungs. Comparisons are made between the images generated. Pulmonary embolism can be diagnosed using this procedure. (12 Jan 1998) |
| perfusion | 1. <physiology> The act of pouring over or through, especially the passage of a fluid through the vessels of a specific organ. 2. A liquid poured over or through an organ or tissue. (18 Nov 1997) |
| perfusion cannula | A double-barreled cannula used for irrigation of a cavity, the wash fluid passing into the cavity through one tube and out through the other. Washout cannula, a cannula that can be irrigated without removal from the artery. (05 Mar 2000) |
| perfusion, regional | Neoplasm drug therapy involving an extracorporeal circuit with temporary exclusion of the tumour-bearing area from the general circulation during which high concentrations of the drug are perfused to the isolated part. (12 Dec 1998) |
| coronary perfusion pressure | The pressure at which blood proceeds through the coronary circulation, mainly in diastole. (05 Mar 2000) |
| isolated limb perfusion | <oncology, procedure> Chemotherapy treatment in which blood is taken from a patient, pumped through a machine that adds anticancer drugs to the blood, then returned to the limb being treated. (15 Oct 1997) |
| tissue perfusion | A term that describes blood flow into the tissues. Inadequate tissue perfusion is a clinical syndrome known as shock. (27 Sep 1997) |
| lung perfusion agents | <radiology> Tc-99m MAA (macro-aggregated albumin), Tc-99m HAM (human albumin microspheres), dose 4 mCi, particles, size 10 - 90 m, number 200,000 - 400,000, effect 1 : 1000 arterioles embolised (12 Dec 1998) |
| magnetic | 1. A magnet. "As the magnetic hardest iron draws." (Milton) 2. Any metal, as iron, nickel, cobalt, etc, which may receive, by any means, the properties of the loadstone, and which then, when suspended, fixes itself in the direction of a magnetic meridian. Source: Websters Dictionary (01 Mar 1998) |
| magnetic attraction | The force that draws iron or steel toward a magnet. (05 Mar 2000) |
| magnetic axis | <physics> This typically refers to the location of the innermost flux surface in a toroidal device, the one which encloses no volume and has therefore degenerated from a flux surface into a single field line. Roughly, the circle through the middle of the dough of the donut. Additionally, in systems with magnetic islands (see entry below), each island has a local magnetic axis, distinct from the overall magnetic axis of the torus. (09 Oct 1997) |
| magnetic confinement | <physics> Use of magnetic fields to confine a plasma. (Confinement involves restricting the volume of the plasma and/or restricting particle or energy transport from the centre of the plasma to the edge.) (09 Oct 1997) |
| magnetic confinement fusion | <physics> Method of fusion which uses magnetic fields / magnetic bottles to confine a hot plasma until fusion occurs. (09 Oct 1997) |