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Abstract #3225

Improved Homogeneity of B1+ and Signal Intensity at 7T Using a Parallel Transmission on Human Volunteers

Taisuke Harada1,2, Kohsuke Kudo1, Ikuko Uwano3, Fumio Yamashita3, Hiroyuki Kameda1,3, Tsuyoshi Matuda4, Makoto Sasaki3, and Hiroki Shirato2

1Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, Sapporo, Japan, 2Department of Radiation Medicine, Hokkaido University Graduate School of Medicine, Sapporo, Japan, 3Division of Ultrahigh Field MRI, Institute for Biomedical Sciences, Iwate Medical University, Yahaba, Japan, 4MR Applications and Workflow, GE Healthcare, Tokyo, Japan

The aim of our study was to compare the homogeneity of B1+ map and clinical gradient-echo images at 7T between two-channel pTx and qTx. MRS phantom with a water pack and six volunteers were scanned by 7T MRI, and the homogeneity was evaluated by coefficient of variation of region-of-interest analysis. The signal homogeneities of B1+ map and GRASS image were better in pTx than in qTx, however the homogeneity of SPGR images had no difference between pTx and qTx, in both phantom and volunteer studies. These results might facilitate the development of pTx.

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