The image shape produced by a mechanical transducer is often described as which of the following?

The image shape produced by a mechanical transducer is often described as which of the following?

• A. Sector-Shaped
• B. Circular
• C. Fan-Shaped
• D. Rectangular

Answer: (C)

Mechanical transducers create their image by a single piezoelectric element that sweeps through angles as it is rotated or moved. This means the ultrasound beam fans out over a limited angular range, imaging a wedge-like portion of tissue. The resulting display is described as fan-shaped (a sector of a circle), because the beams radiate from the transducer like a handheld fan. This contrasts with rectangular images typical of linear array scanning, where the field is more boxy, and with circular coverage, which would imply a full circular area—neither of which describes the mechanical transducer’s scanned field.

Mechanical transducers create their image by a single piezoelectric element that sweeps through angles as it is rotated or moved. This means the ultrasound beam fans out over a limited angular range, imaging a wedge-like portion of tissue. The resulting display is described as fan-shaped (a sector of a circle), because the beams radiate from the transducer like a handheld fan.

This contrasts with rectangular images typical of linear array scanning, where the field is more boxy, and with circular coverage, which would imply a full circular area—neither of which describes the mechanical transducer’s scanned field.