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Abstract #3780

Fast 3D Undersampled Bloch-Siegert based B1+ Mapping for use in MREPT

Safa Ozdemir1, Efe Ilicak1, Carmen Stutz1, Mara Berger1, Jascha Zapp1, Lothar R. Schad1, Yusuf Z. Ider2, and Frank G. Zöllner1,3
1Computer Assisted Clinical Medicine, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany, 2Electrical and Electronics Engineering, Bilkent University, Ankara, Turkey, 3Mannheim Institute for Intelligent Systems in Medicine, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany

Magnetic Resonance Electrical Properties Tomography (MREPT) technique utilizes complex B1+ information to obtain conductivity (σ) and permittivity (ϵ). Since obtaining B1+ magnitude is rather time consuming, several phase-based MREPT methods were previously suggested. However, these methods contain inaccuracies especially towards the periphery of the imaged object. In this paper, we utilize one of the fastest B1+ magnitude mapping techniques in order to obtain fast and accurate B1+ magnitude maps to be used in conductivity imaging. Phantom measurements show that accurate 3D B1+ magnitude maps can be acquired in less than 30 seconds, therefore improving the practicality of conductivity imaging.

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