@inproceedings{4e1456dff08942bab8a346069398abed,
title = "Ultrasound current source density imaging of a time-varying current field in a multielectrode nerve chamber",
abstract = "Drug resistant epilepsy can in some cases be treated with surgery. To minimize potentially crippling side effects of surgery, a detailed functional map of the brain is usually required prior to resection. Conventional mapping techniques rely on a coarse grid of electrodes with limited spatial resolution. Ultrasound Current Source Density Imaging (UCSDI) is new high resolution method to image electric current based on ultrasound. UCSDI potentially enhances conventional mapping procedures as it produces 4D (space and time) maps of current flow co-registered to ultrasound. In this paper, we describe a new system for studying UCSDI in peripheral nerves and neural tissue. This system allows multi-electrode detection of conventional electrophysiological signals simultaneous with UCSDI. UCSDI was used to map short bursts of current injected through the rat sciatic nerve. The amplitude of the current was varied to test the sensitivity of the system. The detection threshold was 0.1 mA/cm2 at ∼250 kPa, well within range for detecting bioelectric signals in neural tissue.",
keywords = "Acoustoelectric, Bioelectromagnetism, Electrical brain mapping, Epilepsy, Neuroelectrophysiology, UCSDI",
author = "Ragnar Olafsson and Qian Li and Zhaohui Wang and Pier Ingram and Witte, {Russell S.}",
year = "2009",
doi = "10.1109/ULTSYM.2009.5441400",
language = "English (US)",
isbn = "9781424443895",
series = "Proceedings - IEEE Ultrasonics Symposium",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "333--336",
booktitle = "2009 IEEE International Ultrasonics Symposium and Short Courses, IUS 2009",
note = "2009 IEEE International Ultrasonics Symposium, IUS 2009 ; Conference date: 20-09-2009 Through 23-09-2009",
}