Transducer Characteristics and Types

These flashcards cover key concepts related to transducer types and characteristics, aiding in exam preparation.

Two Dimensional Imaging

Imaging where sound travels in a straight line, and sound beams must be narrow to optimize lateral resolution.

Mechanical Transducer

A transducer with a single, circular, disk-shaped active element that generates fan or sector shaped images.

Beam Steering

The process of directing sound beams emitted by the transducer, often achieved by rotating the crystal in mechanical transducers.

Beam Focusing

The technique of concentrating the sound beam at a specific depth, can be fixed (conventional, mechanical) or electronic.

Damaged PZT Crystal

When the PZT crystal malfunctions, the entire image is lost in mechanical transducers, while in some arrays, only a portion is affected.

Transducer Arrays

Modern arrays contain multiple active elements, arranged into collections to allow for varied transmission and acquisition.

Linear Array Transducer

Active elements arranged in a straight line, producing images with a rectangular shape.

Annular Phased Arrays

Transducers with active elements arranged as circular rings, allowing for mechanical steering and multiple focal zones.

Linear Phased Arrays

Transducers where elements are compact and arranged in a narrow rectangular shape, utilizing electronic steering for beam focus.

Vector Arrays

A combination of linear sequential and linear phased arrays that allow for trapezoidal image shapes and combined steering methods.