The effects of ultrasound on soft tissue are called

Sound waves cannot travel through:

In pulsed Doppler ultrasonography, the red blood cell acts mainly as

The concentric layers of laminar blood flow are said to do which of the following?

If the frame rate increases and the lines per frame is unchanged, what else will happen?

A piezoelectric transducer serves as a detector by doing what?

Using a tissue equivalent phantom, a sonographer adjusts the gain so that reflections on the display change from fully bright to barely visible.  What is the sonographer evaluating?

Which of the following is the best description of the clinical application of the concept “dynamic range”?

Studies indicate that ultrasound exposures to small animals have resulted in no biological effects as long as the spatial peak-temporal average intensity produced by an unfocused ultrasound beam is below:

How many bits are needed to represent 128 shades of grey?