Magnetic Resonance Imaging in Coronary Artery Disease

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  • 冠動脈疾患におけるMRI

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Abstract

Magnetic resonance (MR) imaging presents several approaches to the assessment of coronary artery disease. The narrowing of coronary arteries can be directly assessed with MR coronary angiography. Though its spatial resolution is inferior to conventional X-ray angiography, MR coronary angiography becomes one of the screening methods for the clinical evaluation of coronary artery stenosis. MR imaging can also estimate coronary blood supply as an essential function of coronary artery. Blood flow velocity in coronary artery is measured by breath hold velocitye ncoded cine MR imaging. Myocardial perfusion is evaluated with high-speed MR imaging after administration of contrast enhancement agent. Finally, the abnormality of wall motion resulting from ischemia is another important object for clinical management of coronary artery disease. Myocardial tagging technique demonstrates the absolute changes of myocardial location. This technique adds a unique aspect of wall motion analysis to conventional cine MR imaging. Present status of MR imaging technique in the diagnosis of coronary artery disease is reviewed and summarized.

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