Answer #29

The correct answer is A: It estimates how much damping is occurring. Quality factor is defined as the resonant frequency/bandwidth and is unitless. Imaging transducers typically have relatively low quality factors (compared to other types of transducers such as therapeutic transducers) with a large bandwidth. This is a result of the backing material which causes damping. Quality factor is unrelated to duty factor which is a percent of how much time the transducer is sending a pulse (transmission time/listening time)