Beacock C J, Roberts E E, Rees R W, Buck A C
Br J Urol. 1985 Aug;57(4):410-3. doi: 10.1111/j.1464-410x.1985.tb06299.x.
A method of measuring residual urine volume using ultrasound is described. The volume is computed from serial parallel sections of the bladder. This method is found to be significantly more accurate than previously reported techniques and is quick and easy to perform.