Which of the following produces false echoes that are occasionally seen in fluid-filled masses? 

An echo that has undergone an attenuation of 3dB will have an intensity that is ______ than its initial intensity.

Axial resolution is also known as all of the following except:

Beam steering is achieved in a linear phased array by

The piezoelectric effect is the 

The type of reverberation echo that usually results from a small gas bubble and appears as a high-amplitude echo occurring at regular intervals is called a

What does the arrow in the following image point to? 

What type of resolution is degraded in the presence of grating lobes and side lobes?

When the speed of fluid is constant across a vessel, the flow is called _________ flow.

The type of artifact that produces a reduction in echoes distal to a highly reflective or highly attenuating structure is