Rosalind Sadleir et al 2005 Physiol. Meas. 26 875 doi:10.1088/0967-3334/26/5/023
Rosalind Sadleir1, Samuel Grant2, Sung Uk Zhang1, Byung Il Lee3, Hyun Chan Pyo3, Suk Hoon Oh3, Chunjae Park3, Eung Je Woo3,4, Soo Yeol Lee3, Ohin Kwon4 and Jin Keun Seo5
Show affiliationsIn magnetic resonance electrical impedance tomography (MREIT), we measure the induced magnetic flux density inside an object subject to an externally injected current. This magnetic flux density is contaminated with noise, which ultimately limits the quality of reconstructed conductivity and current density images. By analysing and experimentally verifying the amount of noise in images gathered from two MREIT systems, we found that a carefully designed MREIT study will be able to reduce noise levels below 0.25 and 0.05 nT at main magnetic field strengths of 3 and 11 T, respectively, at a voxel size of 3 × 3 × 3 mm3. Further noise level reductions can be achieved by optimizing MREIT pulse sequences and using signal averaging. We suggest two different methods to estimate magnetic flux noise levels, and the results are compared to validate the experimental setup of an MREIT system.
Issue 5 (October 2005)
Received 7 May 2005, accepted for publication 19 July 2005
Published 8 August 2005
Rosalind Sadleir et al 2005 Physiol. Meas. 26 875
Luigi Cantini and Pietro Menotti 2003 Class. Quantum Grav. 20 845
Anne Fournier-Desseux and Jacques Jossinet 2005 Physiol. Meas. 26 337
Nicolas Coulombe et al 2005 Physiol. Meas. 26 401
Atul S Minhas and M Ramasubba Reddy 2005 Physiol. Meas. 26 489
Fernando Seoane et al 2005 Physiol. Meas. 26 849
Kevin C Krogman et al 2005 Nanotechnology 16 S338
David M Otten and Boris Rubinsky 2005 Physiol. Meas. 26 503
J Voit 1995 Rep. Prog. Phys. 58 977
Ming-Che Chang and Qian Niu 2008 J. Phys.: Condens. Matter 20 193202