| Catheterization remains the gold standard for bladder volume assessment, but it is invasive, uncomfortable to the patient, and introduces the risk of infections and trauma. To reduce the need for a urinary catheter, a new method has recently been introduced that non-invasively and instantaneously measures the bladder volume on the basis of nonlinear wave propagation and using a single diverging acoustic beam. The performance of the original computational method to quantitatively measure volume was compared with an alternative algorithm using simulations on nonlinear wave propagation and In-Vivo measurements. Measurements were performed with an experimental setup including a custom designed multilayer transducer. |