Which artifact is illustrated by this image?

In the image below, how many transmit focal zones are being used?  

Flow reversal in early diastole and lack of flow in late diastole is demonstrated with: _______

An artifact that results from refraction of the ultrasound beam at a muscle-fat interface and give rise to double images is called

If a patient has normal arterial waveforms with low velocities in the vessels, which is most likely?

How can you adjust the elevation focus to a more superficial location in a 1D array transducer?

How we can calculate the best axial resolution that can be obtained with a given transducer?

The Pulsed-Doppler system yields better depth resolution than the continuous wave (CW) system.

In this image, the Doppler spectral display exhibits _________

With oblique incidence of sound beam, if the velocity of the initial medium is greater than the velocity of the following medium, _______