Dual-mode ultrasound phased arrays for noninvasive surgery: Post-beamforming image compounding algorithms for enhanced visualization of thermal lesions

Charles Steidl, Hui Yao, Pornchai Phukpattaranont, Emad S. Ebbini

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations

Abstract

A post-beamforming nonlinear compounding algorithm for ultrasonic imaging is presented. Fundamental and harmonic image components from beamfromed radio frequency (RF) data are extracted, envelope detected and compounded using a spatial compounding functions (SCFs) derived from the transmit/receive beamforming topology used in obtaining the RF data. This is specially useful for applications where single-transmit focus (STF) imaging is used. In this paper, we present results from STF imaging experiments using a novel dual-mode phased array system for image-guided surgery. In particular, we address the enhancement of the echogenicity of thermal lesions formed in ex vivo tissue. It is shown that new nonlinear image compounding algorithm produces 25-30 dB enhancement in lesion echogenicity without loss in spatial resolution. This is to be compared with a typical enhancement of 5 dB achieved by standard echographic imaging and 20 dB achieved by second harmonic imaging alone. In addition, images resulting from the new algorithm are virtually free of beamforming artifacts that can severely degrade the performance of 2nd harmonic imaging.

Original languageEnglish (US)
Title of host publication2002 IEEE International Symposium on Biomedical Imaging, ISBI 2002 - Proceedings
PublisherIEEE Computer Society
Pages429-432
Number of pages4
ISBN (Electronic)078037584X
DOIs
StatePublished - Jan 1 2002
EventIEEE International Symposium on Biomedical Imaging, ISBI 2002 - Washington, United States
Duration: Jul 7 2002Jul 10 2002

Publication series

NameProceedings - International Symposium on Biomedical Imaging
Volume2002-January
ISSN (Print)1945-7928
ISSN (Electronic)1945-8452

Other

OtherIEEE International Symposium on Biomedical Imaging, ISBI 2002
CountryUnited States
CityWashington
Period7/7/027/10/02

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