Generally all Magnetic Resonance Imaging (MRI) techniques are affected by magnetic and electric properties of measured materials, resulting in errors in MR image. Using numerical simulation we can solve the effect of changes in homogeneity of static and RF magnetic fields caused by specimen made from conductive and/or magnetic material in MR tomograph. This paper deals with numerical simulation of material susceptibility influence to magnetic field.
2. Sepulveda, N. G., I. M. Thomas, J. P. Wikswo, and Jr., "Magnetic susceptibility tomography for three-dimensional imaging of diamagnetic and paramagnetic objects," IEEE Transaction on Magnetics, Vol. 30, No. 6, 5062-5069, 1994.
doi:10.1109/20.334296
3. Kubasek, R., M. Steinbauer, and K. Bartusek, "Material influences in MR tomography, measurement and simulation," Journal of Electrical Engineering, Vol. 8, 58-61, Zilina, 2006.
4. Wang, Z. J., S. Li, and J. C. Hasselgrove, "Magnetic resonance imaging measurement of volume magnetic susceptibility using a boundary condition," Journal of Magnetic Resonance, Vol. 142, 477-481, 1999.
doi:10.1006/jmre.1999.1873
5. Hwang, S. N. and F. W. Wehrli, "Experimental evaluation of surface charge method for computing the induced magnetic field in trabecular bone," Journal of Magnetic Resonance, Vol. 139, 35-45, 1999.
doi:10.1006/jmre.1999.1744
6. Eastham, J. F., R. J. Hill-Cottingham, I. R. Young, and J. V. Hajnal, "A method of inverse calculation for regions of small susceptibility variations," IEEE Transaction on Magnetics, Vol. 33, No. 2, 1212-1215, 1997.
doi:10.1109/20.582471
7. Eastham, J. F., R. J. Hill-Cottingham, I. R. Young, J. V. Hajnal, P. J. Leonard, and W. Lin, "Use of finite element analysis to calculate field changes in low susceptibility materials," Proceedings of Compumag 95 International Conference, 546-547, Berlin, Germany, 1995.
8. Steinbauer, M., "Magnetic susceptibility measurement using MRI methods,", Ph.D. thesis, Brno University of Technology, 2005.
Submit
