Abstract #3297
Local Electrical Properties Tomography With Global Regularization By Gradient
Jiaen Liu 1 , Xiaotong Zhang 1 , Yicun Wang 1 , Pierre-Francois Van de Moortele 2 , and Bin He 1,3
1
Biomedical Engineering, University of
Minnesota, Minneapolis, Minnesota, United States,
2
Center
for Magnetic Resonance Research, University of
Minnesota, Minneapolis, Minnesota, United States,
3
Institute
for Engineering in Medicine, University of Minnesota,
Minneapolis, Minnesota, United States
The in vivo electrical conductivity and permittivity of
tissues at Larmor frequency carries important
information for both diagnostic purpose and real-time
subject-specific local SAR quantification. Traditional
electrical properties tomography (EPT) derives a local
solution and can be severely deteriorated due to noise
contamination. In the present study, a new approach was
proposed to improve the local EPT solution with global
regularization by the spatial gradient information of
electrical properties, which is deducted from measured
transmit B1 field induced in a multi-channel
radiofrequency coil. Experiments involving a controlled
physical phantom and healthy human subject were
conducted to evaluate the proposed algorithm.
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