Fig. 20
From: Dynamic magnetic resonance imaging of the female pelvic floor—a pictorial review
Descending perineal syndrome in a man. (a, b) Sagittal midline TrueFISP images at rest (a) and during evacuation (b) of a man with complaints of constipation and incomplete evacuation showing an increase of the H and M lines during evacuation phase (blue line, 88 mm; green line, 63 mm respectively), compatible with descending perineal syndrome with increased hiatal width and descent