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Abstract #1617

Title: Breath-Hold Peripheral Pulse-Gated Black-Blood T2-Weighted Lung Magnetic Resonance Imaging with the Variable Refocusing Flip Angle Technique

Ryotaro Kamei1, Yuji Watanabe2, Koji Sagiyama1, Satoshi Kawanami2, Atsushi Takemura3, Masami Yoneyama3, and Hiroshi Honda1

1Department of Clinical Radiology, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan, 2Department of Molecular Imaging and Diagnosis, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan, 3Healthcare, Philips Electronics Japan, Tokyo, Japan

Breath-hold black-blood magnetic resonance imaging of the lung provides promising results in focal lesion screening. Using peripheral pulse gating, we intended to improve the image quality obtained with previously reported methods. Black-blood fat-saturated T2-weighted images were acquired for healthy volunteers at various time points during the pulse cycle. The degree of attenuation of the intraluminal signals was quantified. The longest trigger delay, which corresponds to the systolic phase, provided superior black-blood effects and was considered optimal for signal acquisition. Thus, peripheral pulse gating enabled convenient and effective attenuation of the signals within pulmonary vessels.

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