Abstract #0648

Ultimate intrinsic SNR in the torso of a realistic body model

Yuting Wang^1,2, Markus W. May^3,4, Mark E. Ladd^1,2,4,5, and Stephan Orzada¹

¹Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany, ²Faculty of Physics and Astronomy, Heidelberg University, Heidelberg, Germany, ³High-Field and Hybrid MR Imaging, University Hospital Essen, Essen, Germany, ⁴Erwin L. Hahn Institute for MRI, University Duisburg-Essen, Essen, Germany, ⁵Faculty of Medicine, Heidelberg University, Heidelberg, Germany

Synopsis

Keywords: In Silico, Simulations, uiSNR, body, torso

Motivation: Ultra-high field body imaging may offer opportunities for oncology thanks to potential SNR gain at high B_0.

Goal(s): To investigate how the ultimate intrinsic SNR (uiSNR) varies with increasing static magnetic field B₀ in the torso of a realistic body model.

Approach: The uiSNR in the torso was investigated by performing electromagnetic simulations with a randomly excited dipole cloud surrounding a realistic body model.

Results: From 0.55 T to 3 T, the uiSNR increases approximately linearly with B₀ (uiSNR∝B₀^0.98±0.10). From 5 T to 14 T, the uiSNR increases superlinearly with an increase exponent around 2 (uiSNR∝B₀^1.99±0.28).

Impact: The superlinear increase exponent of uiSNR in the torso from 5 T to 14 T indicates promising potential for ultra-high field MRI in the body.

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