Fig. 23From: Dynamic magnetic resonance imaging of the female pelvic floor—a pictorial reviewAnal incontinence. (a, b) Sagittal midline TrueFISP images at rest (a) and during Valsava maneuver (b), with loss of the ultrasound gel in the second one. Notice the opening of the anal sphincter (red arrow). (c) Axial T2-TSE image of the internal anal sphincter demonstrating atrophy with lipomatous involution of the sphincter muscles (white arrow)Back to article page