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Abstract #0444

Display of the Swallowtail Sign at 7T: SWI is not the wisest choice

Ruiting Chen1, Qing Li2, Dongcui Wang1, Sai Li1, Yicheng Hsu2, and Weihua Liao1
1Xiangya Hospital, Central South University, Changsha, China, 2MR Research Collaboration Team, Siemens Healthineers Ltd., Shanghai, China

Synopsis

Keywords: Parkinson's Disease, Neurodegeneration

Motivation: At 7T, due to increased sensitivity to flow and pulsation artifacts, the display of the Swallowtail Sign by SWI is not sufficiently excellent and shows significant individual variations.

Goal(s): Identify sequences that can clearly display the Swallowtail Sign in 7T MRI.

Approach: Experienced radiologists evaluate whether the Swallowtail Sign displayed by SWI, 3D T2WI SPACE, 3D fluid attenuation inversion recovery (FLAIR) SPACE, and Dual Echo Steady-State (DESS) is clear, and provide a 5-scale score.

Results: DESS (echo2) and FLAIR_SPACE provide a clearer display of the Swallowtail Sign compared to SWI.

Impact: Compared to the commonly used SWI sequence (at 1.5T and 3T) for observing the Swallowtail Sign, DESS (echo2) and FLAIR_SPACE can display the Swallowtail Sign more clearly at 7T.

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