Which of the following is NOT assessed with a flow phantom or test object for spectral Doppler imaging?

Name the artifact seen on the image below.

Which of the following is associated with a tissue-equivalent phantom?

What causes weak reflections due to low intensity sound beams whichDiverge from the main sound beam?

The dead zone is the region

Doppler phantoms assess all the following performance characteristics or parameters, except:

____ artifact is the interference pattern resulting from constructive and destructive interference of echoes returning simultaneously from many scatterers. This artifact makes a gray-scale image appearing grainy.

The correct number of reflectors are displayed, but they appear at incorrect depth is called :reverberation or ring down

The beam diverges , resulting in a drop in intensity from curved structures _____________________

Tissue-equivalent phantom can be used to evaluate dead zone. To eliminate visualization problem associated with dead zone during scanning of superficial structure, which of the following can be placed between the transducer and the skin?