Feasibility of human in vivo skeletal muscle and cardiac proton spectroscopy at 0.75T

Proton MR spectroscopy can assess cardiac triglyceride levels. Although spectral separation and thermal polarization decrease at lower field strength, increased T₂^* and T₂ values, decreased T₁ values, decreased echo times and the possibility to decrease receiver bandwidth are clear advantages compared to higher fields. In this work the feasibility of in vivo skeletal muscle and cardiac proton spectroscopy at 0.75T is demonstrated. For this purpose, a clinical 3T Philips Achieva scanner was ramped down to a field strength of 0.75T. Results are compared to spectra acquired at 1.5T and 3T and simulations confirm experimental findings.