Description

The use of FM pulse imaging scheme to obtain multispectral data from a speckle generating medium is discussed. Its potential for speckle reduction was evaluated by computing correlation coefficients. Measured coefficients were also compared with model predictions. The results are consistent with other published reports and show that significant speckle decorrelation can be achieved with this technique, if one averages frames acquired with center frequencies at the extreme ends of the transducer operating bandwidth, and a small enough Δf. At these extremes, the transducer response is low. This response limitation can, however, be overcome by increasing the linear frequency sweep time duration in the FM pulse imaging scheme. In a frequency dependent attenuating medium, proper choices of f o and Δf spanning the entire operating bandwidth of transducer may be necessary. The flexibility inherent in the FM pulse scheme can be exploited here (Refer to PDF file for exact formulas).

Date of creation, presentation, or exhibit

3-18-1993

Comments

Proceedings of the 19th Annual Northeast Bioenginnering Conference (1993) 47-49 "Multispectral ultrasound imaging and analysis of speckle generating medium," Proceedings of the 19th Annual Northeast Bioengineering Conference. Institute of Electrical and Electronics Engineers. Held in Newark, New Jersey: 18-19 March 1993. ©1993 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 Whitaker Foundation Grant. ISBN: 0-7803-0925-1Note: 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

Share

COinS