A new ultrasonic holographic imaging method, UHB imaging has been developed. This method is based on the combination of the holographic principle and conventional B-scan technique. This combining has been achieved using computerized numerical image reconstruction based on wavefront backward propagation. An important feature of this reconstruction process is a wavefront curvature compensation which leads to optimal lateral and longitudinal resolution. The theory of UHB imaging has been verified firstly by simulated UHB imaging in a computer and secondly by constructing an UHB apparatus and producing experimental UHB images of a resolution test object and human brain specimens.
KeywordsReconstruction Process Scanning Line Ultrasound Frequency Holographic Principle Holographic Imaging
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- 1.A L Boyer et al., Computer reconstruction of images from ultrasonic holograms. Acoustical Holography, Vol 2 Ed A F Metherell et al., Plenum Press, New York (1970).Google Scholar
- 2.J W Goodman, Introduction to Fourier optics, McGraw - Hill Book Company, San Francisco (1968).Google Scholar
- 3.J Koivukangas, Doctoral thesis (to be published in 1983)Google Scholar