ventilation-perfusion scanning

ventilation-perfusion scanning
a nuclear medicine technique in which two different isotopes are used, one inhaled (usually xenon-133 or krypton-81m), to examine lung ventilation, and one injected, to examine lung perfusion. In pulmonary embolism, the area of lung supplied by the blocked artery is not being perfused with blood - a perfusion defect - but has normal ventilation. This technique is highly sensitive for pulmonary embolism.

Medical dictionary. 2011.

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  • ventilation-perfusion scanning — V/Q scanning a nuclear medicine technique in which two different isotopes are used, one inhaled (usually xenon 133 or krypton 81m), to examine lung ventilation, and one injected, to examine lung perfusion. In pulmonary embolism, the area of lung… …   The new mediacal dictionary

  • Perfusion scanning — Perfusion is defined as the passage of fluid through the lymphatic system or blood vessels to an organ or a tissue. [American Psychological Association (APA):perfusion. (n.d.). Dictionary.com Unabridged (v 1.1). Retrieved March 20, 2008, from… …   Wikipedia

  • perfusion scan — a technique for demonstrating an abnormal blood supply to an organ by injecting a radioactive tracer or contrast medium. One of the most common uses, often in conjunction with ventilation scanning (see ventilation perfusion scanning), is to… …   Medical dictionary

  • perfusion scan — a technique for demonstrating an abnormal blood supply to an organ by injecting a radioactive tracer or contrast medium. One of the most common uses, often in conjunction with ventilation scanning (see ventilation perfusion scanning), is to… …   The new mediacal dictionary

  • V/Q scanning — ventilation perfusion scanning …   The new mediacal dictionary

  • V/Q scanning — see ventilation perfusion scanning …   Medical dictionary

  • Myocardial perfusion imaging — Intervention Nuclear medicine myocardial perfusion scan with Thallium 201 for the rest images (bottom rows) and Tc Sestamibi for the stress images (top rows). The nuclear medicine myocardial perfusion scan plays a pivotal role in the noninvasive… …   Wikipedia

  • CT pulmonary angiogram — (CTPA) is a medical diagnostic test that employs computed tomography to obtain an image of the pulmonary arteries. Its main use is to diagnose pulmonary embolism (PE).Diagnostic useCTPA was introduced in the 1990s as an alternative to… …   Wikipedia

  • xenon-133 — A radioisotope of xenon with a gamma emission at 81 keV and a physical half life of 5.243 days; used in the study of pulmonary function and organ blood flow. * * * n …   Medical dictionary

  • xenon-133 — n. a radioactive isotope that has a half life of about five days and is used in ventilation scanning of the lungs in nuclear medicine (see ventilation perfusion scanning). It gives off beta particles, which are responsible for the relatively high …   The new mediacal dictionary

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