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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?

The type of transducer that combines the technology of linear sequence and phased array to produce a trapezoidal shaped image is called 

An increase in reflection amplitude from reflectors that lie behind a weakly attenuating structure is called

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