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Abstract #4026

Correlation between CT and QSM in the brain

Sonoko Oshima1, Yasutaka Fushimi1, Tomohisa Okada2, Akira Yamamoto3, Satoshi Nakajima1, Gosuke Okubo1, Hikaru Fukutomi1, Yusuke Yokota1, and Kaori Togashi1

1Department of Diagnostic Radiology and Nuclear Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan, 2Human Brain Research Center, Graduate School of Medicine, Kyoto University, Kyoto, Japan, 3Integrated Clinical Education Center, Kyoto University Hospital, Kyoto, Japan, Kyoto, Japan

Quantitative susceptibility mapping (QSM) is a technique which can provide quantitative values of magnetic susceptibility, and thus is a useful tool for differentiating hemorrhage from calcification. Computed tomography (CT) is also used for evaluation of hemorrhage and calcification by using CT values. However, the correlation between CT and QSM has not been much investigated. In this study, we found positive correlations between CT values and susceptibility in the globus pallidus and hemorrhagic lesions. Negative correlations were observed in the choroid plexus and calcified lesions. Our results may help radiologists revisit the CT values based on the susceptibility values calculated from QSM.

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