Technical Program

Paper Detail

Paper:	FR-PM-SS1.5
Session:	Multimodality Imaging
Time:	Friday, April 7, 15:54 - 16:10
Presentation:	Special Session Oral
Title:	Magnetic Resonance-Electrical Impedance Tomography in Breast Cancer Imaging
Authors:	Ozlem Birgul; University of California, Irvine
	Mark J. Hamamura; University of California, Irvine
	L. Tugan Muftuler; University of California, Irvine
	Orhan Nalcioglu; University of California, Irvine
Abstract:	Magnetic resonance - electrical impedance tomography employs low amplitude currents injected or induced inside an object. The additional magnetic field due to these currents results in a phase in the MR images. A modified fast spin-echo sequence is used to measure this magnetic field, which is simply the scaled phase MR image. Finite element method is used for the solution of the forward problem. An iterated sensitivity matrix based algorithm was developed for the inverse problem. Resulting ill-conditioned matrix equation was regularized using Tikhonov method and solved using a conjugate gradient solver. After assessing the performance of the technique with agarose gel phantoms, we carried out experiments on rats with induced tumor to understand the in-vivo performance of this system.

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