scholarly journals Evaluation of energy metabolism in masseter muscles of TMD patients using 31P-MRS(magnetic resonance spectroscopy).

1997 ◽  
Vol 4 (1) ◽  
pp. 9-15 ◽  
Author(s):  
Taihiko Yamaguchi ◽  
Kaori Satoh ◽  
Kosetsu Komatsu ◽  
Tomoyoshi Kimura ◽  
Yoichi Uchiyama ◽  
...  
Keyword(s):  
Energy Metabolism ◽  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Resonance Spectroscopy ◽  
31P Mrs ◽  
Masseter Muscles

scholarly journals Phosphorous Magnetic Resonance Spectroscopy to Detect Regional Differences of Energy and Membrane Metabolism in Naïve Glioblastoma Multiforme

Cancers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 2598
Author(s):  
Lisa Maria Walchhofer ◽  
Ruth Steiger ◽  
Andreas Rietzler ◽  
Johannes Kerschbaumer ◽  
Christian Franz Freyschlag ◽  
...  
Keyword(s):  
Glioblastoma Multiforme ◽  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Healthy Volunteers ◽  
Regional Differences ◽  
Primary Brain Tumor ◽  
Brain Parenchyma ◽  
Resonance Spectroscopy ◽  
31P Mrs ◽  
Diffusion Parameters

Background: Glioblastoma multiforme (GBM) is a highly malignant primary brain tumor with infiltration of, on conventional imaging, normal-appearing brain parenchyma. Phosphorus magnetic resonance spectroscopy (31P-MRS) enables the investigation of different energy and membrane metabolites. The aim of this study is to investigate regional differences of 31P-metabolites in GBM brains. Methods: In this study, we investigated 32 patients (13 female and 19 male; mean age 63 years) with naïve GBM using 31P-MRS and conventional MRI. Contrast-enhancing (CE), T2-hyperintense, adjacent and distant ipsilateral areas of the contralateral brain and the brains of age- and gender-matched healthy volunteers were assessed. Moreover, the 31P-MRS results were correlated with quantitative diffusion parameters. Results: Several metabolite ratios between the energy-dependent metabolites and/or the membrane metabolites differed significantly between the CE areas, the T2-hyperintense areas, the more distant areas, and even the brains of healthy volunteers. pH values and Mg2+ concentrations were highest in visible tumor areas and decreased with distance from them. These results are in accordance with the literature and correlated with quantitative diffusion parameters. Conclusions: This pilot study shows that 31P-MRS is feasible to show regional differences of energy and membrane metabolism in brains with naïve GBM, particularly between the different “normal-appearing” regions and between the contralateral hemisphere and healthy controls. Differences between various genetic mutations or clinical applicability for follow-up monitoring have to be assessed in a larger cohort.

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