The BladderScan BVI 9400 bladder volume instrument, with NeuralHarmonics technology, is a portable 3D ultrasound device that quickly, accurately, and non-nvasively measures urinary bladder volume and post-void residual in adults and small children. With one click, it captures ultrasound images in multiple planes inside the body and produces a 3D dataset of the bladder, based on which it calculates and displays the bladder volume.