Figure 5. 18-year-old female ballet dancer. (a) Coronal spin echo T1 weighted MR image (TR/TE, 722/20) showing low signal in the medial sesamoid (arrow). (b) Coronal short tau inversion recovery MR image (TR/TE/TI, 4655/30/130) showing high signal within the medial sesamoid in keeping with sesamoiditis.