Which objects below are used to evaluate the operation of Doppler instruments?

What does the number 2 in the Doppler shift refer to?

Which of the following is (are) used currently to indicate output on the ultrasound machine display?

Under similar sonographic exposure conditions, the expected temperature increase in bone is ____________________ than in soft tissue.

Prudent practice of sonography involves application of the ________ principle.                

The pin targets (denoted by the blue arrow) are used when performing which of the following QA tests?

In tissues that do not contain well-defined gas bodies, no effects have been reported for mechanical index values less than approximately: (choose the best answer)

What adjustment was made to create Image B?

There is a greater likelihood of cavitation bioeffects with _________ frequency trasnducers.

When obtaining a heart rate measurement on a fetus (especially during the first trimester), the AIUM requires that which of the following modes be used?