Title :
Noise Analysis of MREIT at 3T and 11T Field Strength
Author :
Sadleir, R.J. ; Grant, S.C. ; Zhang, S.U. ; Oh, S.H. ; Lee, B.I. ; Pyo, H.C. ; Park, C.J. ; Woo, E.J. ; Lee, S.Y. ; Seo, J.K. ; Kwon, O.
Author_Institution :
Dept. of Biomed. Eng., Florida Univ., Gainesville, FL
Abstract :
In magnetic resonance electrical impedance tomography (MREIT), we measure the induced magnetic flux density inside an imaging object subject to an external injection current. The magnetic flux density is contaminated with noise and this ultimately limits the quality of reconstructed conductivity and current density images. By using two methods to analyze amounts of noise in 3T and 11T MREIT systems, we found that a carefully designed MREIT study will be able to reduce the noise level below 0.1 nT
Keywords :
Gaussian noise; biomagnetism; biomedical MRI; electric impedance imaging; image reconstruction; medical image processing; 11 T; 3 T; MREIT; current density images; external injection current; induced magnetic flux density; magnetic resonance electrical impedance tomography; noise analysis; reconstructed conductivity; Current measurement; Density measurement; Impedance measurement; Magnetic analysis; Magnetic field measurement; Magnetic flux density; Magnetic noise; Magnetic resonance; Noise level; Tomography; MREIT; magnetic flux density; noise analysis;
Conference_Titel :
Engineering in Medicine and Biology Society, 2005. IEEE-EMBS 2005. 27th Annual International Conference of the
Conference_Location :
Shanghai
Print_ISBN :
0-7803-8741-4
DOI :
10.1109/IEMBS.2005.1617011
