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Proceedings Paper

Quantitative Characterization Of Tumors And Other Lesions In VIVO Using Ultrasonic Impediography
Author(s): Joie Pierce Jones
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Paper Abstract

Present medical ultrasound systems are based on energy detection methods and therefore only utilize echo intensity information. Phase information is recorded by the transducer, which is a pressure sensitive device, but is not utilized in present display or measurement schemes. This investigator has developed one approach for utilizing both the phase and amplitude information available in an ultrasound waveform. The approach is based on a time-domain characterization of system dynamics in terms of an impulse response function and has been termed impediography. This paper describes preliminary in vivo results obtained with an impediographic measurement system applied to the human eye. A conventional ophthalmic B-scan unit was modified so that any single A-scan line of interest could be digitized by a fast A/D converter. The resulting signals were recorded on magnetic media and subjected to impediographic processing using an off-line computer. Although the study was limited to several types of intraocular and orbital lesions, unique and distinctive ultrasonic signatures (in terms of impedograms) could be associated with each lesion type. The study suggests that impediography can be applied to other body regions and that the method can differentiate between a wide range of pathologies.

Paper Details

Date Published: 15 November 1978
PDF: 5 pages
Proc. SPIE 0152, Recent and Future Developments in Medical Imaging I, (15 November 1978); doi: 10.1117/12.938191
Show Author Affiliations
Joie Pierce Jones, University of California Irvine (United States)


Published in SPIE Proceedings Vol. 0152:
Recent and Future Developments in Medical Imaging I
Norman A. Baily, Editor(s)

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