MRI Guided Transcranial Acoustoelectric Imaging for Safe and Accurate Electrical Brain Mapping

Margaret Allard, Chet Preston, Teo Trujillo, Chiao Huang, Nan Kuei Chen, Russell S. Witte

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

1 Scopus citations

Abstract

Transcranial acoustoelectric brain imaging (tABI) is a new modality that combines ultrasound (US) delivery through the skull with radiofrequency sensing to produce electrical maps of the brain at high resolution. Whereas noninvasive EEG suffers from poor spatial resolution and inaccuracies for estimating current source densities, tABI takes advantage of an acoustoelectric (AE) interaction signal, which confines the current measurement to the focal region of the US beam on the millimeter scale. To safely and accurately deliver US pulses to the brain and co-register tABI maps with structure, a feedback and guidance system is required. The goal of this study is to demonstrate and determine the accuracy of neuronavigated tABI with real-time feedback for optimally placing the US array and directing the beam to the selected target location in the head. This will facilitate co-registration of the human head model, structural MRI, and tABI current density maps. The integrated system allows for a prediction of the US beam trajectory through the human skull with registration to clinical images for guidance and improving accuracy of real-time tABI. The guided system protocol adds only minutes to the process and results in easy localization of the target in the brain. The guided tABI has a resolution of 3 mm and a targetting accuracy of 5.1 mm.

Original languageEnglish (US)
Title of host publicationIUS 2022 - IEEE International Ultrasonics Symposium
PublisherIEEE Computer Society
ISBN (Electronic)9781665466578
DOIs
StatePublished - 2022
Event2022 IEEE International Ultrasonics Symposium, IUS 2022 - Venice, Italy
Duration: Oct 10 2022Oct 13 2022

Publication series

NameIEEE International Ultrasonics Symposium, IUS
Volume2022-October
ISSN (Print)1948-5719
ISSN (Electronic)1948-5727

Conference

Conference2022 IEEE International Ultrasonics Symposium, IUS 2022
Country/TerritoryItaly
CityVenice
Period10/10/2210/13/22

Keywords

  • Acoustoelectric Imaging
  • EEG
  • Focused Ultrasound
  • Neuronavigation
  • UTE MRI

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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