Abstract #2681

Evaluation of Kinematics and Image Quality of Thoracic Outlet during Humeral Elevation in Normal Volunteers Using 3D-MRI with Compressed Sensing

Manabu Arai^1,2, Taiki Nozaki², Saya Horiuchi², Takahiro Sato², Miki Hirano², Shigekazu Funada², Takeshi Hara³, Atsushi Tasaki⁴, Nobuto Kitamura⁴, Masahiro Jinzaki¹, and Yasuyuki Kurihara²

¹Department of Radiology, Keio University School of Medicine, Tokyo, Japan, ²Department of Radiology, St. Luke's International Hospital, Tokyo, Japan, ³Department of Intelligent Image Information, Gifu University School of Medicine, Gifu, Japan, ⁴Department of Orthopaedic Surgery, St. Luke's International Hospital, Tokyo, Japan

We performed 3D-MR imaging with compressed sensing on the thoracic outlet of 23 normal volunteers, comparing it with conventional 2D-MR imaging. The image quality score of 3D-PDWI with compressed sensing was significantly lower than that of 2D-PDWI. However, no significant difference in the image quality score of MRA with compressed sensing due to arm position was demonstrated. Subclavian arterial stenosis during humeral elevation was shown in 30.4% of asymptomatic subjects without gender predominance. 3D-MR imaging using compressed sensing enables us to evaluate the kinematics of the thoracic outlet, and may contribute to the diagnosis of TOS in clinical settings.

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