What is the length of the transmitted ultrasound signal known as?

The length of the transmitted ultrasound signal is referred to as pulse length. This term specifically describes the physical distance that the ultrasound wave travels during the time that it is transmitted. Pulse length is determined by the duration of the pulse and the speed of sound in the medium.

Understanding pulse length is crucial for imaging because it impacts the axial resolution, which refers to the ability to distinctly identify two closely spaced structures along the axis of the ultrasound beam. The shorter the pulse, the better the axial resolution, enabling clearer images. However, this resolution is separate from the concept of pulse length itself, which simply measures the distance the pulse covers.

Other options, while related to ultrasound, describe different concepts. Pulsed wave refers to the type of ultrasound wave produced, while duty factor pertains to the ratio of the time that the ultrasound is actually being transmitted compared to the total time of the pulse cycle. These terms highlight various aspects of ultrasound technology but do not define the length of the pulse itself.