Four-dimensional ultrasound current source density imaging of a dipole field

Z. H. Wang, R. Olafsson, P. Ingram, Q. Li, Y. Qin, R. S. Witte

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

Ultrasound current source density imaging (UCSDI) potentially transforms conventional electrical mapping of excitable organs, such as the brain and heart. For this study, we demonstrate volume imaging of a time-varying current field by scanning a focused ultrasound beam and detecting the acoustoelectric (AE) interaction signal. A pair of electrodes produced an alternating current distribution in a special imaging chamber filled with a 0.9 NaCl solution. A pulsed 1 MHz ultrasound beam was scanned near the source and sink, while the AE signal was detected on remote recording electrodes, resulting in time-lapsed volume movies of the alternating current distribution.

Original languageEnglish (US)
Article number113701
JournalApplied Physics Letters
Volume99
Issue number11
DOIs
StatePublished - Sep 12 2011

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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