Abstract
UCT images produced by methods utilized in previous clinical studies are compared with images from alternative techniques. While simple ray principles are appropriate for x-ray CT imaging, a finite width ultrasound beam is subject to irregular refractive and diffractive paths through the media. Corrections are possible with varying complexity, degree of potential improvement and probability of success. The methods discussed are of this class yet they remain within the generation of approaches based on ray principles. Methods to implement the cross correlation approach and other related rf signal processing techniques on a clinical UCT scanner are evaluated. The speed of sound images of a coronal plane through a breast illustrate subjectively the degree of image quality improvement obtainable using an rf signal processing approach over leading edge detection as an estimator of pulse transit time.
Original language | English (US) |
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Pages | 127 |
Number of pages | 1 |
State | Published - 1984 |
ASJC Scopus subject areas
- General Engineering