15 November 1978 Quantitative Characterization Of Tumors And Other Lesions In VIVO Using Ultrasonic Impediography
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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.
© (1978) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Joie Pierce Jones, Joie Pierce Jones, } "Quantitative Characterization Of Tumors And Other Lesions In VIVO Using Ultrasonic Impediography", Proc. SPIE 0152, Recent and Future Developments in Medical Imaging I, (15 November 1978); doi: 10.1117/12.938191; https://doi.org/10.1117/12.938191

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