Fig. 5From: Perianal ultrasound (PAUS): visualization of sphincter muscles and comparison with digital-rectal examination (DRE) in femalesMeasurements in PAUS volumes. a Presentation of the measurement positions for sphincter muscle thicknesses and diameters in coronal plane. b Definition of the plane for the measurements (red), 4 mm from the lowermost plane (left) where both sphincter muscles are seen completely the first time. c Schematic representation of measurement positions, d + e schematic representation of the defined plane for measurementsBack to article page