Non-Contrast Time-Resolved MR Angiography with Consecutive Beam Pulse with Variable Saturation Flip Angle
Hirohito Kan1,2, Kyosuke Mizuno3, Masahiro Takizawa4, Masashi Shimohira5, Tatsuya Kawai5, Tositaka Aoki6, Satoshi Tsubokura6, and Harumasa Kasai6
1Department of Integrated Health Scieneces, Nagoya University Graduate School of Medicine, Nagoya, Japan, 2Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan, 3Department of Radiology, Nagoya City University Hospital, Nagoya, Japan, 4FUJIFILM Healthcare Corp., Tokyo, Japan, 5Department of Radiology, Nagoya City University Graduate School of Medical Scieneces, Nagoya, Japan, 6Nagoya City University Hospital, Nagoya, Japan
To develop and validate the non-contrast time-resolved MR angiography (NC TR-MRA) with consecutive beam pulse with variable saturation flip angle method, we performed a phantom study using steady flow and the volunteer study targeted to the pulmonary artery. The length of visualized flow signals was exhibited proportional to the number of beam saturation pulses in the phantom study. In human study, the visualization range of the pulmonary artery was also extended with increasing the number of beam pulses. The novel consecutive beam pulse with variable saturation flip angle method can depict blood vessels in each flow phase.
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