Title :
Magnetically induced magnetoacoustic generation and conductivity reconstruction for a multi-layer cylindrical model
Author :
Ma, Qingyu ; He, Bin
Author_Institution :
Univ. of Minnesota, Minneapolis
Abstract :
When a conductive object is excited by a pulsed magnetic field, the eddy current is induced and the magnetoacoustic signal can be generated because of the vibration of the induced Lorentz force. A theoretical study on magnetically induced magnetoacoustic generation and conductivity-reconstruction for a multi-layer cylindrical model was conducted. In the forward problem, the principle and the formulae as well as the characteristics of the acoustic generation are obtained; meanwhile, the explicit formulae of conductivity reconstruction algorithm are derived as the inverse problem solution. Computer simulations were conducted and the promising results suggest the feasibility of the proposed theory.
Keywords :
biomagnetism; biomedical ultrasonics; eddy currents; inverse problems; magnetoacoustic effects; conductivity reconstruction; conductivity reconstruction algorithm; eddy current; induced Lorentz force; inverse problem solution; magnetoacoustic generation; multilayer cylindrical model; pulsed magnetic field; Character generation; Computer simulation; Conductivity; Eddy currents; Inverse problems; Lorentz covariance; Magnetic fields; Pulse generation; Reconstruction algorithms; Signal generators;
Conference_Titel :
Noninvasive Functional Source Imaging of the Brain and Heart and the International Conference on Functional Biomedical Imaging, 2007. NFSI-ICFBI 2007. Joint Meeting of the 6th International Symposium on
Conference_Location :
Hangzhou
Print_ISBN :
978-1-4244-0949-5
Electronic_ISBN :
978-1-4244-0949-5
DOI :
10.1109/NFSI-ICFBI.2007.4387755
