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Abstract #4174

Analysis of changes in magnetic susceptibility artifacts due to static magnetic field strength, imaging sequence and chemical composition

Ryusuke Nakai1, Seiji Yamaguchi2, Mitsuaki Toda3, Takashi Azuma4, and Hiroo Iwata4
1Kokoro Research Center, Kyoto University, Kyoto, Japan, 2College of Life and Health Sciences, Chubu University, Aichi, Japan, 3Graduate School of Health Care Sciences, Jikei Institute, Osaka, Japan, 4Graduate School of Medicine, Kyoto University, Kyoto, Japan

Reducing or resolving susceptibility artifacts is important for development of materials for medical implants. In this study, we measured and evaluated magnetic susceptibility artifacts for various metals and ceramics using two MRI systems with different static magnetic field strengths and multiple imaging sequences. MR images were acquired following the criteria of the spin echo sequence and gradient echo sequence required in the US FDA standard artifact evaluation test. The results were used to clarify the relationships among artifact size in MR images, volume magnetic susceptibility of samples, and static magnetic field strength of the MRI system.

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