What method steers the color beam with a linear array transducer?

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Multiple Choice

What method steers the color beam with a linear array transducer?

Explanation:
Steering the color beam with a linear array is accomplished by applying electronic time delays across the individual elements, a phased-array approach. By introducing progressively different delays to each element, the emitted waves interfere constructively in a chosen direction, steering the beam without moving the transducer and allowing rapid adjustment of the display sector for color Doppler. Apodization shapes the beam and reduces sidelobes but doesn’t steer the main beam; mechanical steering would require moving the probe, and varying voltages alone changes amplitude or other properties rather than the beam direction.

Steering the color beam with a linear array is accomplished by applying electronic time delays across the individual elements, a phased-array approach. By introducing progressively different delays to each element, the emitted waves interfere constructively in a chosen direction, steering the beam without moving the transducer and allowing rapid adjustment of the display sector for color Doppler. Apodization shapes the beam and reduces sidelobes but doesn’t steer the main beam; mechanical steering would require moving the probe, and varying voltages alone changes amplitude or other properties rather than the beam direction.

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