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What type of artifact is seen with a bright tapering trail of echoes just distal to closely spaced strong reflectors? 

The most common type of artifact encountered in patients with shotgun wounds is

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

Artifacts appearing as parallel, equally spaced lines are characteristic of

What does the arrow in the following image point to? 

For an unfocused transducer, if frequency increases, the beam width will 

A transducer with a large bandwidth is likely to have

What ultrasound method requires two active elements mounted side by side? 

Huygen’s principle is used to describe

Which letter corresponds to the casing of the transducer in the following image?