Systems and methods are provided for selectively utilizing ultrasound data to quantify a part being scanned. One embodiment is a system that includes an ultrasonic wave generator configured to induce ultrasonic waves at locations along a part being scanned, and a controller. The controller is configured to operate the ultrasonic wave generator to collect data points that each indicate amplitude data and time-of-flight data of an ultrasonic wave at the part, to calculate a standard deviation of the time-of-flight data of the data points (σtof), to utilize the amplitude data to quantify the part if σtof is less than a threshold value, and to flag the data points in memory as including noise if σtof is greater than the threshold value.