A New, High-Performance Ultrasonic Camera
By virtue of their true-perspective presentation, focused and holographic methods of ultrasonic imaging hold great promise for soft tissue visualization. However, none of the numerous methods demonstrated to date combine the features required of a clinically useful instrument.
A new ultrasonic camera for real-time imaging of soft tissue is described. This system produces high resolution images of a 15- × 15-cm field. Its high sensitivity (10-11 W/cm2 threshold) permits penetration of a considerable depth of tissue. Both transmission and reflection imaging are provided, with pulse/range-gating operation in both modes. The image is displayed on a television monitor and may be recorded on video tape.
The ultrasonic camera incorporates a unique wavefield deflection system for scanning the image past a linear array of 192 piezoelectric detectors. Linear and logarithmic amplification is provided in each signal channel.
Ultrasonic images of test objects and of human extremities are presented.
KeywordsTransmission Image Video Tape Ultrasonic Imaging Reflection Image Television Monitor
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