Frequency modulated pulse for ultrasonic b-scan imaging in attenuating medium

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Title: Frequency modulated pulse for ultrasonic b-scan imaging in attenuating medium
Author: Mehra, Sumat
Abstract: A rigorous study of a new technique for Ultrasonic B-Scan imaging was performed. This technique made use of a Frequency Modulated (FM) pulse as opposed to the conventional Short pulse for imaging. The simulation studies offered sufficient support for this method, which was then implemented in the laboratory. Experiments were performed on phantoms which mimicked the attenuating medium. Due to the more flexible nature of this FM pulse, changes in the point spread function were studied as a function of bandwidth and depth of the scatterer. The backscattered signal was digitized post processed, and then displayed as a gray-scale B-scan image. The beam profile and the propagation of the pulse in the attenuating medium was carefully studied. Applications for tissue characterizations were explored through simulation studies.
Record URI: http://hdl.handle.net/1850/11641
Date: 1991-05

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