Figure 1.

Pelvic ultrasound done with a urine volume of 108.6 mL shows a prostate volume of 24.5 mL. The images on the left are both longitudinal whilst the images on the right are transverse. The margins of the prostate are well demonstrated in image (A) for optimum prostate volume measurement, whilst the urinary bladder is well‐centred in image (B) for optimum urine volume measurement. Three pairs of callipers 1+, 2+ are shown on the longitudinal image for the cranio‐caudal and antero‐posterior images, and 3+ for the transverse measurements.