Fig. 1From: Pelvic floor status in opera singers. a pilot study using transperineal ultrasound Measurement of the levator hiatal anteroposterior diameter in the plane of minimal hiatal dimensions, from the distal echo of the symphysis pubis (SP) to the puborectalis (PR) bulk behind the rectum (horizontal line) and bladder neck vertical distance from the symphysis (vertical line). Urinary bladder (UB).a) Supine position at restb) Supine position at contractionBack to article page