Used Ultrasound Probe GE 4C-SC Convex Abdominal/Imaging System

Knowledge Point

Mechanical probe

A motor drives a rotating head whose shaft is located at the focal point of the probe surface to rotate in one direction. Two focusing transducers are embedded in the rotating head. When the transducer rotates to face the reflector, it emits ultrasonic pulses. After parabolic launching, a row of parallel linear scanning beams are formed, realizing mechanical scanning. Its advantages are that the sector-shaped mechanical scanning probe has a large field of view for far-area exploration, a small contact area for acoustic coupling with the human body, and the same tangential and lateral resolution. It is suitable for ultrasound examination of heart, small organs, ophthalmology, lumen ducts and abdominal organs.

Annular probe

The principle of using the circular ring array dynamic segmented focusing method in mechanical sector-scan ultrasonic diagnostic equipment is the same as that of linear array dynamic focusing. Applying a proper delay to the electrical signal of each element can achieve focusing at any distance along the central axis, which is similar to the function of an acoustic lens, so it functions as an "electronic focusing lens".