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Abstract #4123

Characterization and suppression of stripe artifact in velocity-selective magnetization-prepared unenhanced MR angiography

Taehoon Shin1,2 and Qin Qin3

1Ewha Womans University, Seoul, Republic of Korea, 2Case Western Reserve University, Cleveland, OH, United States, 3Johns Hopkins University, Baltimore, MD, United States

While velocity-selective magnetization-prepared MR angiography (VS-MRA) has shown great promise for diverse arterial territories, artifactual stripes often occur in resultant angiograms. We investigate the formation of the stripe artifact using extended phase graph analysis and show that the stripes contain not only the fundamental frequency determined by the area of VS unipolar gradient but higher-order components with multiples of the fundamental frequency. Based on this finding, we propose and test efficient strategies for suppression of the artifact in a phantom and healthy human subjects.

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