Which transducer type produces a rectangular image shape?

Which transducer type produces a rectangular image shape?

• A. Phased array
• B. Annular array
• C. Linear array
• D. Curved array

Answer: (C)

The shape of the ultrasound image comes from the transducer’s geometry and how the beams are formed. A linear array places many elements in a straight line and, when beams are swept across the image, the resulting scan lines fill a rectangular field on the display. The lateral axis is defined by the width of the straight array, while the depth is along the beam direction, giving a uniform, rectangular grid of data. In contrast, annular arrays have concentric rings and produce a circular field; curved or curved-line (curvilinear) arrays produce a curved or sector-shaped field due to their curved footprint; and phased arrays use electronic steering to fan beams, typically yielding a sector or wedge-shaped image.

The shape of the ultrasound image comes from the transducer’s geometry and how the beams are formed. A linear array places many elements in a straight line and, when beams are swept across the image, the resulting scan lines fill a rectangular field on the display. The lateral axis is defined by the width of the straight array, while the depth is along the beam direction, giving a uniform, rectangular grid of data.

In contrast, annular arrays have concentric rings and produce a circular field; curved or curved-line (curvilinear) arrays produce a curved or sector-shaped field due to their curved footprint; and phased arrays use electronic steering to fan beams, typically yielding a sector or wedge-shaped image.