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Abstract #1632

Relationship between transient severe motion of the liver in gadoxetic acid-enhanced arterial phase imaging and changes of arterial oxygen saturation

Akihiko Kanki1, Tsutomu Tamada1, Ayumu Kido1, Kazuya Yasokawa1, Tomohiro Sato1, Daigo Tanimoto1, Minoru Hayashida1, Akira Yamamoto1, and Katsuyoshi Ito1

1Radiology, Kawaski Medical school, Kurashiki, Japan

The purpose of our study was to clarify the relationship between transient severe motion in arterial phase imaging (TSMA) and changes in SpO2 after contrast media administration during gadoxetic acid-enhanced MRI or CT. As the results, the decrease in SpO2 in arterial phase compared with other phases was less than 1% in both contrast media. The incidence of TSMA was 0% in iodinated contrast media and was 8.2% in gadoxetic acid, respectively. Our study suggests that the cause of TSM in dynamic gadoxetic acid-enhanced MR imaging of the liver may be the ringing artifacts rather than the respiratory-related motion artifacts.

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