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Abstract #2771

Effect of Injection Rates in Free-Breathing Gadoxetic Acid-Enhanced MRI with K-Space Weighted Image Contrast Reconstruction.

RYUJI SHIMADA1, Keitaro Sofue2, Yuichiro Somiya1, Tomohiro Noda1, Shintaro Horii1, Yoshiko Ueno2, Naoki Yoshida1, Wakiko Tani1, Yu Ueda3, Akiko Kusaka1, and Takamichi Murakami2
1Center of Radiology and Radiation Oncology, Kobe University Hospital, Kobe, Japan, 2Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Japan, 3MR Clinical Science, Philips Japan, Tokyo, Japan

We prospectively evaluated the effect of injection rates on TIC analysis in free-breathing gadoxetic acid-enhanced MRI using radial sampling with KWIC reconstruction with different injection rate of 1, 2, and 3 mL/s in 48 patients. Time intensity curve analysis was performed and compared among the three injection rate groups. Time to peak in abdominal aorta was significantly shorter with higher injection rates, and the other parameters regarding portal vein, inferior vena cava, and liver parenchyma were not affected by the injection rates. Higher injection rate is recommended for the better discrimination on arterial input data.

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