Fig. 5
From: Preoperative MRI of perianal fistula evaluation and its impact on surgical outcome
A 38-year-old man with left inter-sphincteric fistula without abscess. a Axial T2-weighted image, the perianal fistula is not visualized. b Axial STIR-weighted image reveals high signal intensity left perianal fistula (arrow). c Axial T1 fat-saturated weighted image, the perianal fistula is not visualized. d Axial T1 fat-saturated post-contrast injection weighted image, the perianal fistula is not visualized. e Axial diffusion-weighted image reveals high signal intensity of the fistula (arrow). f Axial ADC mapping shows high signal intensity of the fistula (arrow)