Metabolic Alterations in Parkinson's Disease after Thalamotomy, as Revealed by 1H MR Spectroscopy
Korean Journal of Radiology
;
: 180-188, 2002.
Article
in English
| WPRIM
| ID: wpr-207030
ABSTRACT
OBJECTIVE:
To determine, using proton magnetic resonance spectroscopy (1H MRS) whether thalamotomy in patients with Parkinson's disease gives rise to significant changes in regional brain metabolism. MATERIALS ANDMETHODS:
Fifteen patients each underwent stereotactic thalamotomy for the control of medically refractory parkinsonian tremor. Single-voxel 1H MRS was performed on a 1.5T unit using a STEAM sequence (TR/TM/TE, 2000/14/20 msec), and spectra were obtained from substantia nigra, thalamus and putamen areas, with volumes of interest of 7-8ml, before and after thalamotomy. NAA/Cho, NAA/Cr and Cho/Cr metabolite ratios were calculated from relative peak area measurements, and any changes were recorded and assessed.RESULTS:
In the substantia nigra and thalamus, NAA/Cho ratios were generally low. In the substantia nigra of 80% of patients (12/15) who showed clinical improvement, decreased NAA/Cho ratios were observed in selected voxels after thalamic surgery (p < 0.05). In the thalamus of 67% of such patients (10/15), significant decreases were also noted (p < 0.05).CONCLUSION:
Our results suggest that the NAA/Cho ratio may be a valuable criterion for the evaluation of Parkinson's disease patients who show clinical improvement following surgery. By highlighting variations in this ratio, 1H MRS may help lead to a better understanding of the pathophysiologic processes occurring in those with Parkinson's disease.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Parkinson Disease
/
Protons
/
Putamen
/
Thalamus
/
Brain
/
Substantia Nigra
/
Magnetic Resonance Imaging
/
Magnetic Resonance Spectroscopy
/
Choline
/
Aspartic Acid
Limits:
Adult
/
Aged
/
Female
/
Humans
/
Male
Language:
English
Journal:
Korean Journal of Radiology
Year:
2002
Type:
Article
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