1. A system to detect and measure an organ cavity comprising: an ultrasound transceiver positioned to deliver ultrasound energy in the form of at least one scan line of at least one of a fundamental and a harmonic frequency to the organ cavity and receive echoes associated with the delivered ultrasound energy from the organ cavity; and an algorithm including a neural network configured to: signal process the received echoes; provide, for each scan line, a binary grading output, determine that a first scan line traversed non-organ tissue if the grading output is low, determine that the first scan line traversed organ tissue if the grading output is high, if the grading output is low, determine that a second or subsequent scan line traversed organ tissue and measure the organ cavity, and if the grading output is high, measure the organ cavity.