Published online Jan 28, 2019. doi: 10.4329/wjr.v11.i1.1
Peer-review started: August 7, 2018
First decision: October 16, 2018
Revised: November 14, 2018
Accepted: January 9, 2019
Article in press: January 10, 2019
Published online: January 28, 2019
Core tip: Proton magnetic resonance spectroscopy (1H MRS) is a technique that is widely used for intramyocellular lipids and extramyocellular lipids quantification in muscles, as evidenced in various studies. However, different muscle positions can potentially lead to inconsistency in metabolite quantification and can also impede interpretation of data, which can lead to misinformation. This study reveals that the muscle orientation at 0°, 30°, 60°, and 90° to the main magnetic field significantly affects the metabolite profile and quantification. The metabolite profile changes due to the muscle fiber orientation demonstrate that the positioning potentially causes inaccuracy in 1H-MRS spectrum analysis.