Artifact reduction in magnetic resonance angiographic images
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United States of America Patent
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Dec 1, 1998
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app pub date -
Mar 21, 1996
filing date -
Mar 21, 1996
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Abstract
A magnetic resonance angiography method for acquiring angiographic images using any or all of three different types of selective presaturation pulses to the particular parts of the body for enhancing vascular imaging. The three types are: 1) an inversion pulse applied prior to the application of a burst of RF pulses used for tipping the spins designed to eliminate signals from unwanted blood entering the field of view being imaged, 2) inversion pulses applied between the first inversion pulse and the first of the Rf pulses used to suppress blood not properly suppressed by the first type of suppression pulses, such as fast flowing blood, and 3) saturation pulses applied within the burst of RF pulses to suppress signals from slow flowing blood when in the 2D acquisition mode. Special heart and breath gating methods are also described that enable good compromises between image quality and scan time.
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