EVALUATION OF CEREBRAL GRAY AND WHITE-MATTER METABOLITE DIFFERENCES BY SPECTROSCOPIC IMAGING AT 4.1T

EVALUATION OF CEREBRAL GRAY AND WHITE-MATTER METABOLITE DIFFERENCES BY SPECTROSCOPIC IMAGING AT 4.1T
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DOI:
10.1002/mrm.1910320504
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发表时间:
1994-11-01
影响因子:
3.3
通讯作者:
POHOST, GM
POHOST, GM
中科院分区:
医学3区
文献类型:
--
作者:
HETHERINGTON, HP;MASON, GF;POHOST, GM

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使用 4.1T 全身系统,我们获得了 N-乙酰 (NA) 化合物、肌酸 (CR) 和胆碱 (CH) 的 H-1 光谱成像 (SI) 数据,标称体素大小为 0.5 cc(过滤后为 1.15 cc)。我们使用 SI 数据来估计人类灰质和白质脑代谢物的差异。为了评估灰质相对于白质 CR/NA 和 CH/NA 比率增加的起源,我们使用中等分辨率 SI 成像测量了灰质和白质中 CR、NA 和 CH 的 T-1 和 T-2。在白质中,NA、CR 和 CH 的 T(2) 分别为 233 +/- 27、141 +/- 18 和 167 +/- 20 ms,在灰质中为 227 +/- 27、140 +/- 16 和 189 +/- 25 ms。灰质中 NA、CR 和 CH 的 T-1 值为 1267 +/- 141、1487 +/- 146 和 1111 +/- 136 ms,白质中为 1260 +/- 154、1429 +/- 233 和 1074 +/- 146 ms。校正 T-1 和 T-2 损失后,白质中的肌酸含量显着低于灰质(P < 0.01,t 检验),白质/灰质含量比为 0.8,与 1.5 和 2.0T 下的活检和体内测量结果一致。
Using a 4.1T whole body system, we have acquired H-1 spectroscopic imaging (SI) data of N-acetyl (NA) compounds, creatine (CR), and choline (CH) with nominal voxel sizes of 0.5 cc (1.15 cc after filtering). We have used the SI data to estimate differences in cerebral metabolites of human gray and white matter. To evaluate the origin of an increased CR/NA and CH/NA ratios in gray matter relative to white matter, we measured the T-1 and T-2 of CR, NA, and CH in gray and white matter using moderate resolution SI imaging. In white matter the T(2)s of NA, CR, and CH were 233 +/- 27, 141 +/- 18, and 167 +/- 20 ms, respectively, and 227 +/- 27, 140 +/- 16, and 189 +/- 25 ms in gray matter. The T-1 values for NA, CR, and CH were 1267 +/- 141, 1487 +/- 146, and 1111 +/- 136 ms in gray matter and 1260 +/- 154, 1429 +/- 233, and 1074 +/- 146 ms in white matter. After correcting for T-1 and T-2 losses, creatine content was significantly lower in white matter than gray (P < 0.01, t-test), with a white/ gray content ratio of 0.8, in agreement with biopsy and in vivo measurements at 1.5 and 2.0T.