机构地区:[1]上海交通大学医学院附属第三人民医院放射科,201900 [2]上海交通大学医学院附属第三人民医院感染科,201900 [3]上海交通大学医学院附属第三人民医院消化内科,201900 [4]复旦大学附属华东医院消化内科
出 处:《中华放射学杂志》2009年第11期1125-1130,共6页Chinese Journal of Radiology
基 金:上海市教育委员会科研项目(05BZ05)
摘 要:目的应用氢质子MR波谱(^1H-MRS)检测肝硬化患者脑内代谢物改变,评价其异常变化是否能鉴别轻微肝性脑病(MHE),并与临床神经心理测试进行相关性分析。方法选取54例肝硬化患者(肝硬化组)和13名健康志愿者(正常对照组)完成神经心理测试,包括数字连接试验A(NCT—A)和数码-符号试验(DST),54例肝硬化患者中包括肝性脑病(HE)9例(HE组)、MHE23例(MHE组)、无HE和MHE者22例(无HE组)。所有患者和志愿者均进行常规头颅MR扫描以及枕叶皮质、左侧顶叶白质的^1H—MRS扫描,分别计算各代谢物包括N-乙酰天冬氨酸(NAA)、胆碱化合物(Cbo)、肌醇(ml)和谷氨酰胺复合物(Glx)与肌酸(Cr)的比值。正常对照组与肝硬化组的代谢物比值比较采用独立样本t检验,正常对照组和肝硬化各分组间代谢物比值的比较采用单因素方差分析,组间两两比较采用非参数Mann—WhitneyU检验,并用Bonferroni法进行校正。^1H-MRS代谢物比值与HE分级、神经心理测试结果、静脉血氨的相关性分析采用Spearman等级相关分析。结果肝硬化组枕叶皮质和左顶叶白质的代谢物比值NAA/Cr、Cho/Cr/、ml/Cr、Glx/Cr值分别为1.55±0.12、0.48±0.10、0.42±0.14、2.52±0.48和1.73±0.17、0.75±0.16、0.42±0.16、2.75±0.59,其中无HE组为1.53±0.10、0.48±0.09、0.51±0.11、2.20±0.39和1.69±0.15、0.82±0.14、0.53±0.12、2.40±0.40,MHE组为1.58±0.13、0.48±0.08、0.38±0.13、2.62±0.39和1.78±0.18、0.74±0.14、0.38±0.15、2.84±0.58,HE组分别为1.54±0.12、0.50±0.13、0.29±0.07、3.04±0.31和1.70±0.19、0.62±0.16、0.29±0.07、3.37±0.38。正常对照组相应部位代谢物比值分别为1.61±0.06、0.60±0.10、0.63±0.04、2.05±0.11和1.78±0.07、1.01±0Objective To evaluate changes of regional cerebral metabolism by proton MR spectroscopy (^1H-MRS) in patients with minimal hepatic encephalopatby (MHE) and to correlate these changes with the neuropsychological test. Methods Fifty-four patients with cirrhosis including nine patients with hepatic encephalopathy (HE), 23 patients with MHE, 22 patients without HE and 13 controls underwent neuropsychological tests and ^1H-MRS scanning. The volumes of interest included occipital gray matter and left parietal white matter regions. Ratio of spectral peak areas of N-acetylaspartate ( NAA ), choline (Cho), myo-inositol (mI), and glutamine/glutamate (Glx) relative to creatine (Cr) were acquired. Statistical analysis was conducted using independent t test and one-way analysis of variance. The results of different groups were compared by using the nonparametric Mann-Whitney U test with Bonferroni correction. Correlations among the 1H-MRS ratios, the grade of HE, neuropsychological test and ammonia data were calculated with Spearman correlation test. Results The ratios of NAA/Cr, Cho/Cr, mI/Cr, Glx/Cr of the occipital gray matter and left parietal white matter regions in patients with cirrhosis are 1.55 ± 0. 12, 0. 48 ±0. 10, 0.42 ±0. 14, 2. 52 ±0. 48 and 1.73 ±0. 17, 0. 75 ±0. 16, 0. 42 ±0. 16, 2. 75 ±0. 59 respectively, and they are 1.53 ±0. 10, 0. 48 ±0. 09, 0. 51 ±0. 11, 2. 20 ±0. 39 and 1.69 ±0. 15, 0. 82 ± 0. 14, 0. 53 ±0. 12, 2.40±0. 40 in patients without HE, 1.58 ±0. 13, 0. 48 ±0. 08, 0. 38 ±0. 13, 2. 62 -± 0.39 and 1.78 ±0. 18, 0.74 ±0. 14, 0.38 ±0. 15, 2.84 ±0.58 in patients with MHE, 1.54±0. 12, 0.50±0. 13, 0.29±0.07, 3.04 ±0.31 and 1.70 ±0. 19, 0.62 ±0. 16, 0.29 ±0.07, 3.37 ±0.38 in patients with HE. Compared with controls, decreased mI/Cr and Cho/Cr ratios and elevated Glx/Cr ratios were found in patients with cirrhosis ( t = 3. 196, 9. 394, - 6. 527, P 〈 0. 01, occipital gray matter, t = 5. 592, 9.717, -6. 681, P 〈 0.01, left parietal white m
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