Ultrasound Current Source Density Imaging
نویسندگان
چکیده
منابع مشابه
Four-dimensional ultrasound current source density imaging of a dipole field.
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 i...
متن کاملMeasuring the acoustoelectric interaction constant using ultrasound current source density imaging.
Ultrasound current source density imaging (UCSDI) exploits the acoustoelectric (AE) effect, an interaction between ultrasound pressure and electrical resistivity, to map electrical conduction in the heart. The conversion efficiency for UCSDI is determined by the AE interaction constant K, a fundamental property of all materials; K directly affects the magnitude of the detected voltage signal in...
متن کاملDetection of Multiple Electrical Sources in Tissue Using Ultrasound Current Source Density Imaging
Accurate three dimensional (3D) mapping of bioelectric sources in the body with high spatial resolution is important for the diagnosis and treatment of a variety of cardiac and neurological disorders. Ultrasound current source density imaging (UCSDI) is a new technique that maps electrical current flow in tissue. UCSDI is based on the acousto-electric (AE) effect, an interaction between electri...
متن کاملCurrent Source Density (CSD) Analysis
Current Source Density analysis (CSD) is a class of methods of analysis of extracellular electric potentials recorded at multiple sites leading to estimates of current sources generating the measured potentials. It is usually applied to low-frequency part of the potential (called the Local Field Potential, LFP) and to simultaneous recordings or to recordings taken with fixed time reference to t...
متن کاملTwo-Dimensional Current Density Imaging
Imaging of electrical current by measuring the magnetic field which it produces requires the solution of the magnetic inverse problem. For a current restricted to a plane, the inverse problem can theoretically be solved by a linear spatial filtering method. We have demonstrated experimentally that currents restricted to the surface of a printed circuit board can be imaged using this method. To ...
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ژورنال
عنوان ژورنال: IEEE Transactions on Biomedical Engineering
سال: 2008
ISSN: 0018-9294,1558-2531
DOI: 10.1109/tbme.2008.919115