With continuous-wave ultrasound, SPTA equals which intensity?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Sharpen your skills for the Davies Publishing SPI Test with targeted flashcards and multiple-choice questions, complete with hints and clarifications. Prepare thoroughly for success!

Multiple Choice

With continuous-wave ultrasound, SPTA equals which intensity?

Explanation:
In continuous-wave ultrasound the beam is always on, so the duty factor is 1. That means there are no off-times, and pulse-average equals temporal (time) average. The intensity defined by spatial peak with time-average (SPTA) relies on that temporal average, while the intensity defined by spatial peak with pulse-average (SPPA) relies on the same time-average in CW. Since the time-average and pulse-average are identical in continuous-wave conditions, SPPA and SPTA are the same quantity. So the intensity that matches SPTA in CW is SPPA.

In continuous-wave ultrasound the beam is always on, so the duty factor is 1. That means there are no off-times, and pulse-average equals temporal (time) average. The intensity defined by spatial peak with time-average (SPTA) relies on that temporal average, while the intensity defined by spatial peak with pulse-average (SPPA) relies on the same time-average in CW. Since the time-average and pulse-average are identical in continuous-wave conditions, SPPA and SPTA are the same quantity. So the intensity that matches SPTA in CW is SPPA.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy