Fig. 17
From: Dynamic magnetic resonance imaging of the female pelvic floor—a pictorial review
Descending perineal syndrome with tricompartimental prolapse and anterior rectocele. (a, b) Sagittal midline TrueFISP images at rest (a) and during evacuation (b). H line (blue line) measures 5.6 cm (a) and 9.5 cm (b) and the M line (green line) measures 1.3 cm (a) and 4.7 cm (b), demonstrating widening and descent of the levator hiatus. Note the vertical orientation of the levator plate (white arrow). It is also associated with a tricompartimental prolapse and an anterior rectocele (*)