Abstract #5418

Quantitative assessment of anterior talofibular ligament quality in chronic ankle instability using T2* relaxation time

Yoshihiro Akatsuka¹, Atsushi Teramoto², Yasutaka Murahashi², Katsunori Takahashi², Rui Imamura¹, Tomoaki Kamiya², and Kota Watanabe³

¹Division of Radiology and Nuclear Medicine, Sapporo Medical University Hospital, Sapporo, Japan, ²Department of Orthopedic Surgery, Sapporo Medical University School of Medicine, Sapporo, Japan, ³Second Division of Physical Therapy, Sapporo Medical University School of Health Sciences, Sapporo, Japan

Synopsis

This study investigated the feasibility of quantitative assessment of anterior talofibular ligament (ATFL) quality in chronic ankle instability (CAI) using T2* relaxation time. A prediction equation for the normal ATFL reference value was calculated in healthy volunteers. The ratio between the normal reference value and the patient's T2* value showed a significant positive correlation with the talar tilt angle on stress radiograph. There was also increasing trend in T2* values for poor ligament quality in the arthroscopic findings. T2* relaxation times are promising for quantitatively assessing ATFL quality preoperatively.

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