Figure 7. 18-year-old female ballet dancer. (a) Sagittal spin echo T1 weighted MR image (TR/TE, 501/20) shows a low signal line (arrow) extending from the cortex of the second metatarsal into the metaphysis characteristic of a stress fracture. (b) Sagittal short tau inversion recovery MR image (TR/TE, 5640/30/130) shows marked marrow oedema and the stress fracture.