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Which transducer is arranged in the shape of a clover leaf so that it provides a large area of illumination?

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in Biomedical Instrumentation by (76.6k points)
Which transducer is arranged in the shape of a clover leaf so that it provides a large area of illumination?

(a) piezo-electric

(b) ultrasonic

(c) array

(d) pressure

This question was addressed to me during an interview.

My question is from Oximeters in chapter Oximeters of Biomedical Instrumentation

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The correct option is (b) ultrasonic

Explanation: The ultrasonic transducer is arranged in the shape of a clover-leaf so that it provides a large area of ultrasonic illumination which allows the monitoring considerable lateral and descending foetal motion before requiring repositioning. The transducer housing is flexible to permit it to follow the contour of the abdomen regardless of shape changes with contractions.

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