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. Zöllner^1,3

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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