Proton magnetic resonance spectroscopy and apparent diffusion coefficient in evaluation of solid brain lesions
2013
Background/Aim. Advanced magnetic resonance techniques can provide insight in
physiological changes within pathological canges and contribute to better
distinquishing between different tumor types and their discrimination from
non-neoplastic lesions. The aim of this study was to evaluate the role of
proton magnetic resonance spectroscopy (1H-MRS) and apparent diffusion
coefficients (ADC) in distinguishing intracranial glial tumors from tumor
like nonneoplastic lesions, as well as for differentiating high- from
low-grade gliomas. Methods. This retrospective study included 47 patients
with solid brain lesions (25 nonneoplastic, 14 low-grade and 8 anaplastic
glial tumors). In all patients 1H-MRS (at a TE of 135 ms and 30 ms) and
diffusion- weighted imaging (DWI) were performed. The choline to creatine
(Cho/Cr), choline to N-acetyl aspartate (Cho/NAA), N-acetyl aspartate to
creatine (NAA/Cr) and myoinositol to creatine (mIn/Cr) ratios and the
apparent diffusion coefficient (ADC) were determined. Results. The Cho/Cr
ratio was significantly higher in glial tumors grade II than in
non-neoplastic lesions (p = 0.008) and in glial tumors grade III than in
non-neoplastic lesions (p = 0.001). The Cho/NAA ratio was significantly
higher in glial tumors grade II than in non-neoplastic lesions (p = 0.037).
ΔADC/ADC between glial tumors grade II and glial tumors grade III showed a
statistical significance (p = 0.023). Conclusion. Our study showed that
1H-MRS and apparent diffusion coefficients can help in evaluation and
differentiation of solid brain lesions.
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