Fig. 1
From: Dynamic contrast-enhanced MR imaging in identifying active anal fistula after surgery
42-year-old man presenting a simple linear intersphincteric fistula. Preoperative MRI: axial T2-weighted image (a) showing the active fistula in hyperintensity (arrow), axial DCE image (b) showing early strong enhancement of the fistula (arrow) and TIC with parameters (c); Postoperative MRI: axial T2-weighted image (d) showing the healing tissue in hypointensity (arrow) and a balloon catheter (arrowhead), axial DCE image (e) showing progressive enhancement of the lesion (arrow) and TIC with parameters (f)