Coded excitation with optimized inverse filter for improving sensitivity in acoustoelectric imaging

Hsin Wu Tseng, Yexian Qin, Matthew O'Donnell, Russell S Witte

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

Abstract

Noninvasive imaging of physiologic currents in the body is limited by poor spatial resolution due to the ambiguous conductivity distribution between the current sources and recording electrodes. Acoustoelectric imaging (AEI), based on the interaction between pressure and resistivity, provides higher spatial resolution. Although we have demonstrated AEI of the cardiac activation wave in the live rabbit heart, weak physiologic currents (e.g., in the heart or brain < 1 μV) and ultrasound (US) pulses of balanced shape (zero mean) make detection especially challenging. This study investigates the use of standard US transducers with coded excitation with optimized inverse filter to produce quasi-unipolar pulses that amplify the AE signal.

Original languageEnglish (US)
Title of host publication2017 IEEE International Ultrasonics Symposium, IUS 2017
PublisherIEEE Computer Society
ISBN (Electronic)9781538633830
DOIs
StatePublished - Oct 31 2017
Event2017 IEEE International Ultrasonics Symposium, IUS 2017 - Washington, United States
Duration: Sep 6 2017Sep 9 2017

Other

Other2017 IEEE International Ultrasonics Symposium, IUS 2017
CountryUnited States
CityWashington
Period9/6/179/9/17

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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