Regional metabolite concentrations in the brain of healthy dogs measured by use of short echo time, single voxel proton magnetic resonance spectroscopy at 3.0 Tesla

2015 ◽  
Vol 76 (2) ◽  
pp. 129-141 ◽  
Author(s):  
Inés Carrera ◽  
Henning Richter ◽  
Dieter Meier ◽  
Patrick R. Kircher ◽  
Matthias Dennler
Keyword(s):  
Proton Magnetic Resonance ◽  
Proton Magnetic Resonance Spectroscopy ◽  
Resonance Spectroscopy ◽  
3.0 Tesla ◽  
Single Voxel ◽  
Metabolite Concentrations ◽  
Healthy Dogs ◽  
Echo Time ◽  
Short Echo Time ◽  
The Brain

Taurine Detection by Proton Magnetic Resonance Spectroscopy in Medulloblastoma: Contribution to Noninvasive Differential Diagnosis with Cerebellar Astrocytoma

Neurosurgery ◽  
2004 ◽  
Vol 55 (4) ◽  
pp. 824-829 ◽  
Author(s):  
Ángel Moreno-Torres ◽  
Irene Martínez-Pérez ◽  
Miguel Baquero ◽  
Jaume Campistol ◽  
Antoni Capdevila ◽  
...  
Keyword(s):  
Differential Diagnosis ◽  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Proton Magnetic Resonance ◽  
Proton Magnetic Resonance Spectroscopy ◽  
Resonance Spectroscopy ◽  
Cerebellar Astrocytoma ◽  
Echo Time ◽  
Short Echo Time

Abstract OBJECTIVE: We sought to evaluate whether taurine detection in short-echo (20 ms) proton magnetic resonance spectroscopy contributes to the noninvasive differential diagnosis between medulloblastoma and cerebellar astrocytoma in children and young adults. These two types of tumor have very different prognoses and may be difficult to differentiate by neuroradiological or clinical means. METHODS: Single-voxel proton magnetic resonance spectra of tumors were acquired at 1.5 T in 14 patients with biopsy-proven primary cerebellar tumors (six medulloblastomas, seven astrocytomas, and one mixed astroependymoma) using short-echo time (20 ms) and long-echo time (135 ms). For taurine assignment, qualitative analysis was performed on short-echo time spectra and results were compared in vitro with spectra of model solutions. Perchloric acid extracts of postsurgical tumor biopsies were performed in two medulloblastoma cases. RESULTS: Taurine detection was demonstrated in all patients with medulloblastoma and in none of those with astrocytoma. We were unable to ascertain any relationship between taurine and metastatic spread within the medulloblastoma group. CONCLUSION: Medulloblastomas characteristically seem to show taurine detectable in vivo by short-echo proton magnetic resonance spectroscopy, which may help to discriminate medulloblastoma from cerebellar astrocytoma.

Neurometabolic alterations in a depression-like rat model of chronic forced swimming stress using in vivo proton magnetic resonance spectroscopy at 7 T

2017 ◽  
Vol 41 (S1) ◽  
pp. S544-S545
Author(s):  
C.H. Yoo ◽  
K.H. Song ◽  
S.I. Lim ◽  
D.C. Woo ◽  
B.Y. Choe
Keyword(s):  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Proton Magnetic Resonance ◽  
Proton Magnetic Resonance Spectroscopy ◽  
Resonance Spectroscopy ◽  
Metabolic Alterations ◽  
Behavioral Despair ◽  
Echo Time ◽  
Short Echo Time

Although recent investigations of major depressive disorder (MDD) have focused on the monoaminergic system, accumulating evidence suggests that alternative pathophysiological models of MDD and treatment options for patients with MDD are needed. Animals subjected to chronic forced swim stress (CFSS) develop behavioral despair. The purpose of this study was to investigate the in vivo effects of CFSS in the rat prefrontal cortex (PFC) with 7 T and short-echo-time proton magnetic resonance spectroscopy (1H MRS). Ten male Wistar rats underwent 14 days of CFSS, and in vivo1H MRS and forced swim tests were performed before and after CFSS. Point-resolved spectroscopy was used to quantify metabolite levels in the rat PFC. The spectral analyses showed that in vivo1H MRS can be used to reliably assess the Glu system. The rats showed significantly increased immobility times and decreased climbing times in the FST after CFSS, which suggested that the rats developed behavioral despair. The pre-CFSS and post-CFSS Glu and Gln levels did not significantly differ (P > 0.050). The levels of myo-inositol, total choline, and N-acetylaspartate, myo-inositol/creatine, and total choline/creatine increased significantly (P < 0.050). Similar findings have been reported in patients with MDD. Taken together, these results suggested that the CFSS-induced metabolic alterations were similar to those found in patients and that high-field and short-echo-time in vivo1H MRS can be used to investigate depression-induced metabolic alterations. Such investigations might provide alternative insights into the nonmonoaminergic pathophysiology and treatment of depression.Disclosure of interestThe authors have not supplied their declaration of competing interest.

scholarly journals Proton Magnetic Resonance Spectroscopy of the Hippocampus and Occipital White Matter in PTSD: Preliminary Results

2002 ◽  
Vol 47 (7) ◽  
pp. 666-670 ◽  
Author(s):  
Gerardo Villarreal ◽  
Helen Petropoulos ◽  
Derek A Hamilton ◽  
Laura M Rowland ◽  
William P Horan ◽  
...  
Keyword(s):  
White Matter ◽  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Proton Magnetic Resonance ◽  
Proton Magnetic Resonance Spectroscopy ◽  
Resonance Spectroscopy ◽  
Preliminary Results ◽  
Single Voxel ◽  
Concentration Changes ◽  
The Brain

Objective: Previous proton magnetic resonance spectroscopy (1H-MRS) studies in posttraumatic stress disorder (PTSD) report decreased hippocampal N-acetylaspartate (NAA), an indicator of neuronal integrity. However, other areas of the brain need to be explored. The objective of this study was to investigate the specificity of hippocampal NAA concentration changes in PTSD by also examining a control region, the occipital white matter (OWM). Methods: Eight patients with PTSD and 5 control subjects underwent single-voxel 1H-MRS of the hippocampi and bilateral OWM. Absolute neurometabolite concentrations were determined. Preliminary Results: Trends toward reduced left hippocampal NAA and creatine (Cre) were found in the PTSD group. PTSD subjects also had reduced bilateral OWM Cre. Conclusions: The preliminary results of our study in civilians with PTSD replicate previous MRS studies and are consistent with decreased hippocampal neuronal integrity without effects in the OWM. Replication of our findings is needed.

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