Which transducer array features a curved line of elements and produces a sector-shaped image with electronic focusing and electronic steering?

Which transducer array features a curved line of elements and produces a sector-shaped image with electronic focusing and electronic steering?

• A. Convex Sequential Array
• B. Linear Sequenced Array
• C. Linear Phased Array
• D. CW Transducers

Answer: (A)

A curved, convex transducer has elements arranged along a curved surface, which makes the scan field fan out into a sector shape. By applying precise time delays across the elements, the system can electronically focus the beam at depth and electronically steer it across the curved field without moving the probe. This combination—a curved line of elements with electronic focus and steering—describes a convex sequential array and explains why it produces a sector-shaped image. Straight-line linear arrays, whether sequential or phased, have a flat footprint and yield rectangular or trapezoidal fields rather than a true sector. Continuous-wave transducers aren’t used for image formation, so they don’t produce a sector-shaped image.

A curved, convex transducer has elements arranged along a curved surface, which makes the scan field fan out into a sector shape. By applying precise time delays across the elements, the system can electronically focus the beam at depth and electronically steer it across the curved field without moving the probe. This combination—a curved line of elements with electronic focus and steering—describes a convex sequential array and explains why it produces a sector-shaped image.

Straight-line linear arrays, whether sequential or phased, have a flat footprint and yield rectangular or trapezoidal fields rather than a true sector. Continuous-wave transducers aren’t used for image formation, so they don’t produce a sector-shaped image.