高速gradient echo法を用いたGd-DTPA持続静注3D MR angiographyの撮像パラメータの検討

概要

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Gd-DTPA Continuous Intravenous Injection 3D MRA (imaging while Gd-DTPA intravenous injecting) is a method for obtaining angiograms by dint of T_1-shortening effect. For this procedure, high concentration of intravascular Gd-DTPA and alleviation of artifacts associated with the imaging effect on extra-vascular tissues are important, for which shortening of the imaging time is hoped for. The conventional gradient echo method, however, had a limit in shortening of the imaging time. Then, in this study, Fast gradient echo method, a higher-speed gradient echo method was examined for its optimal imaging parameters. Combined use of FATSAT, out of phase TE and FA at about 30-50 degrees with Fast SPGR made it possible not only to suppress fat signal, but also to shorten the imaging time, thereby to keep a high concentration of intravascular Gd-DTPA and to outline such an angiogram as is excellent in contrast.
社団法人日本放射線技術学会の論文
1996-04-20