QUANTITATIVE METABOLITE PATTERNS OF HUMAN BRAIN-TUMORS - DETECTION BY H-1-NMR SPECTROSCOPY IN-VIVO AND IN-VITRO

被引:113
作者
USENIUS, JPR
KAUPPINEN, RA
VAINIO, PA
HERNESNIEMI, JA
VAPALAHTI, MP
PALJARVI, LA
SOIMAKALLIO, S
机构
[1] KUOPIO UNIV HOSP, DEPT NEUROSURG, SF-70210 KUOPIO, FINLAND
[2] KUOPIO UNIV HOSP, DEPT CLIN PATHOL, SF-70210 KUOPIO, FINLAND
[3] UNIV KUOPIO, AI VIRTANEN INST, DEPT BIOCHEM & BIOTECHNOL, SF-70211 KUOPIO, FINLAND
关键词
MAGNETIC RESONANCE IMAGING; PROTON SPECTROSCOPY; BRAIN; NEOPLASMS; QUANTIFICATION;
D O I
10.1097/00004728-199409000-00005
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
Objective: The aim of the present study was to investigate quantitative metabolite patterns in human brain tumors by H-1 nuclear MR spectroscopy (H-1 MRS). Materials and Methods: Single voxel H-1 MRS was used in studying metabolites in 23 primary brain tumors in vivo. The T2 relaxation times and saturation factors were determined for N-acetylaspartate (NAA), total creatine (Cr), choline-containing compounds (Cho), and water, which was used as an internal standard in computations of metabolite concentrations in vivo. Metabolites in biopsy specimens from 75 tumors were quantified by means of H-1 MRS in vitro. Results: The NAA concentrations were lower in brain tumors than in normal tissue in vitro and in vivo, irrespective of the histological type. The NAA was some threefold higher in vivo than in vitro, which could be due to partial volume effect and/or contributions from other metabolites to the peak at 2.02 ppm in vivo. Ratios of Cho to Cr concentrations were elevated in tumors relative to normal brain in vivo. Absolute Cho was some 50% higher in both benign astrocytomas and oligodendrogliomas in vivo than in normal brain. However, Cho concentration in vitro was significantly higher only in pituitary adenomas than in healthy white matter. Total creatine was similar to 50% lower in malignant astrocytomas and meningiomas than in normal brain. Conclusion: It is concluded that absolute concentrations of metabolites in vivo yield a different picture of tumor metabolites than that derived from uncorrected metabolite ratios.
引用
收藏
页码:705 / 713
页数:9
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