FLASHとIR-Prep FLASHを用いたgadolinium急速静注法による息止め下3D coronary MR angiography

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  • Three-dimensional Coronary MR Angiography with Breath-hold Contrast Enhancement on Rapid Intravenous Gadolinium Injiction Using FLASH and IR-Prep FLASH

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The k-space segmented fat-saturation fast low angle shot (3D-FLASH) technique was used to obtain MR images of coronary arteries using navigator-echo-based respiratory gating. In recent years, it has been possible to obtain these images with a single breath-hold and contrast enhancement by rapid intravenous injection. Now IR-Prep 3D-FLASH has been developed and is available. We have obtained MR images of model arteries that had stenosis using 3D-FLASH and IR-Prep 3D-FLASH, and evaluated them physically and visually. Our research through this basic experiment has led to improvement. We have also evaluated the signal-to- noise ratio (SNR) and contrast-to-noise ratio (CNR) using the images of patients we have examined. The results have been better than those obtained by the usual sequences. Volume-rendering images of coronary arteries were very similar to CAG images. These images depicted peripheral vessels continuously and stenosis was detected clearly. In particular, images with high contrast between coronary artery and myocardium were obtained by IR-Prep 3D-FLASH.

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