Influence of Foot Orientation on the Appearance of 1H Muscle Spectra Obtained from Soleus and Vastus Lateralis

¹Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota, Minneapolis, MN, USA; ²Division of Endocrinology, Diabetes, and Metabolism, University of Minnesota, Minneapolis, MN, USA

In vivo ¹H spectroscopy in skeletal muscle has been more frequently performed in the lower leg than the thigh. It has been shown at 3 T that ankle orientation alters bulk susceptibility and residual dipolar couplings of protons in the calf skeletal muscle. With in vivo ¹H MRS, changes in the residual dipolar couplings have been observed on creatine and TMA with ankle orientation. Additionally, changes in ankle orientation also affected the separation of intramyocellular and extramyocellular lipids. In this project, we investigate the influence of ankle orientation on ¹H spectra from the thigh, specifically the vastus lateralis muscle.