Description

In medical ultrasound imaging, the axial resolution is limited by the bandwidth of the transducer. The frequency response of the transducer usually peaks at its center frequency f0 but falls off at higher and lower frequencies. In a linear frequency modulation (FM) pulse coding technique for imaging, the frequency can be swept across the entire bandwidth of the transducer. In this technique it is possible to apply at the input an amplitude boost function [1] that is the inverse of the transducer frequency response. Thus the output from the transducer is an equalized FM pulse, with a wider effective bandwidth. Subsequent auto correlation or pulse compression processing preserves this bandwidth and consequently improves the resolution. This concept has been evaluated experimentally in this paper (Refer to PDF file for exact formulas).

Date of creation, presentation, or exhibit

11-3-1994

Comments

Proceedings of the 16th Annual International Conference of IEEE Engineering in Medicine and Biology 1 (1994) 676-677 "Pre-enhancement of chirp signal for inverse filtering in medical ultrasound," Proceedings of the 16th Annual International Conference of IEEE Engineering in Medicine and Biology. Institute of Electric and Electronics Engineers. Held in Baltimore, Maryland: 3-6 November 1994. ©1994 Institute of Electrical and Electronics Engineers (IEEE). Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. This work was supported in part by a grant from the Whitaker Foundation. ISBN: 0-7803-2050-6Note: imported from RIT’s Digital Media Library running on DSpace to RIT Scholar Works in February 2014.

Document Type

Conference Proceeding

Department, Program, or Center

Chester F. Carlson Center for Imaging Science (COS)

Campus

RIT – Main Campus

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