Title :
Acousto-electrical speckle pattern in Electrical Impedance Tomography
Author :
Grasland-Mongrain, Pol ; Destrempes, Francois ; Mari, Jean-Martial ; Souchon, Remi ; Catheline, Stefan ; Chapelon, Jean-Yves ; Lafon, Cyril ; Cloutier, Guy
Author_Institution :
Lab. de Biorheologie et d´Ultrasonographie Medicale, Univ. de Montreal, Montréal, QC, Canada
Abstract :
Lorentz Force Electrical Impedance Tomography (LFEIT) is a medical imaging technique of the tissue electrical impedance. It is based on the transmission of an ultrasound beam in a medium placed in a magnetic field, which induces an electrical current due to Lorentz force. The measurement of this current with electrodes allows to produce electrical impedance images with a spatial resolution close to ultrasound (US) imaging. The goal of this study is to assess the existence of an “acousto-electric speckle” in the LFEIT technique, by similarity to the US speckle.
Keywords :
bioelectric phenomena; biological tissues; biomedical electrodes; biomedical transducers; biomedical ultrasonics; electric impedance imaging; phantoms; LFEIT; Lorentz force electrical impedance tomography; acousto-electrical speckle pattern; electrical impedance images; electrodes; frequency 500 kHz; gelatin phantom; medical imaging technique; spatial resolution; tissue electrical impedance; transducer; ultrasound beam transmission; ultrasound imaging; ultrasound wave; Acoustics; Imaging; Impedance; Lorentz covariance; Magnetoacoustic effects; Speckle; Ultrasonic imaging;
Conference_Titel :
Ultrasonics Symposium (IUS), 2014 IEEE International
Conference_Location :
Chicago, IL
DOI :
10.1109/ULTSYM.2014.0056
