22 August 1980 Pulse Echo And Doppler Reconstructive Tomography
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Proceedings Volume 0231, 1980 Intl Optical Computing Conf I; (1980); doi: 10.1117/12.958845
Event: 1980 Technical Symposium East, 1980, Washington, D.C., United States
Abstract
In tomography, a cross section of an object is imaged with as little interference as possible from structures not in the cross section. In reconstructive tomography, the image is computed from elementary measured data. Both X rays and nuclear emissions from injected radioactive isotopes are being successfully used in clinical applications at the present time. However, these modalities suffer the disadvantage of being invasive. Fortunately, other forms of energy can also be used in reconstructive tomography, including microwaves and ultrasound. As opposed to X rays, micro and acoustic waves can be reflected, and in this paper we explore methods to obtain images from such reflected waves. Our methods include pulse-echo reconstructive tomography and tomographic extensions of CW Doppler processing. The use of these forms of energy, as opposed to X rays, also permits the possibility of coherent signal generation and processing. In this paper, our emphasis is on Doppler processing. Analysis is presented as well as exprimental verification of the analysis. It is both theoretically and experimentally shown that high-quality reconstruction of object points can be obtained. Two equal points separated by a quarter wavelength may be resolved in the case of the coherent Doppler tomography.
© (1980) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Glen Wade, Dean Mensa, "Pulse Echo And Doppler Reconstructive Tomography", Proc. SPIE 0231, 1980 Intl Optical Computing Conf I, (22 August 1980); doi: 10.1117/12.958845; https://doi.org/10.1117/12.958845
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KEYWORDS
Doppler tomography

Tomography

Signal processing

Image processing

Microwave radiation

Acoustics

Doppler effect

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