急性一氧化碳中毒迟发脑病的磁共振波谱特征及其临床意义

目的 研究急性一氧化碳中毒迟发脑病(delayed encephalopathy following acute carbon monoxide poisoning,DEACOP)患者的质子磁共振波谱(1H magnetic resonance spectroscopy,1H MRS)特征及临床意义.方法 对38例DEACOP患者和30例正常志愿者分别进行常规核磁及质子磁共振波谱检查,对比分析DEACOP患者与正常志愿者的额叶、脑室旁、枕叶的N-乙酰天门冬氨酸(NAA)、肌酸/磷酸肌酸(Cr)、含胆碱代谢物(Cho)含量的变化,对以Cr为参照的代谢产物比值(Cho/Cr,Cho/NAA,NAA/Cr)进行比较,并分析NAA/Cr、Cho/Cr、Cho/NAA与患者简易智能状态检查量表(MMSE)和患者日常生活能力量表(ADL)的相关性.结果 获取的DEACOP组患者波谱数据显示不同部位的NAA/Cr同对照组比较降低,差异有统计学意义(P＜0.01),Cho/Cr、Cho/NAA同对照组比较增高,差异有统计学意义(P＜0.01);Cho/Cr与MMSE、ADL评分呈明显负相关,Cho/NAA与MMSE、ADL评分呈明显负相关,NAA/Cr与MMSE、ADL评分呈明显正相关.中、重度DEACOP患者NAA/Cr同轻度患者比较降低,差异有统计学意义(P＜0.05),Cho/Cr、Cho/NAA同对照组比较增高,差异有统计学意义(P＜0.05).结论 通过1H MRS检测DEACOP患者脑部病灶的代谢异常可显示神经元损伤程度,代谢物比值异常变化提示预后不佳.

Abstract：

Objective To study the characteristics of proton magnetic resonance spectroscopy (1H magnetic resonance spectroscopy, 1H MRS) in patients with delayed encephalopathy following acute carbon monoxide poisoning (DEACOP) and its significance in the early diagnosis of the disease. Methods MRI and 1H MRS were performed in 38 DEACOP patients and 30 healthy volunteers. The ratios of N-acetylaspartate ( NAA), Creatine ( Cr), Choline (Cho) peaks were measured in each volume of interest, and the correlation of Activity of Daily Living Scale (ADL) and Mini-Mental State Examination (MMSE) with NAA/Cr, Cho/Cr,Cho/NAA were analyzed. Results Compared with those of the control group, the NAA/Cr ratio in different parts decreased with very significant statistical differences ( P ＜ 0. 01 ), while Cho/Cr and Cho/NAA ratio increased also with very significant statistical difference ( P ＜ 0. 01 ). Negative correlation was found in the assessment scores between Cho/Cr and MMSE, ADL. Cho/NAA was also negatively correlated in the assessment scores with MMSE and ADL, and NAA/Cr was positively correlated in the assessment scores with MMSE and ADL. The NAA/Cr ratio in moderate and serious DEACOP patients decreased, when it was compared with that of the mild DEACOP patients, with statistical differences (P ＜ 0. 05 ). Cho/Cr and Cho/NAA ratio increased, when it was compared with that of the control group, with statistical differences ( P ＜0. 05). Conclusions 11 MRS could detect metabolic abnormalities in DEACOP patients with brain lesion.Abnormal changes in the ratio of metabolites might indicate poor prognosis.     

急性CO中毒迟发性脑病的MRI表现

目的：探讨急性CO中毒迟发性脑病（DEACMP）的MRI特征。方法：回顾性分析21例急性CO中毒迟发性脑病患者的MRI和临床资料。结果：急性CO中毒迟发性脑病MRI表现可分为3种：①神经核团受累：21例,典型表现为双侧苍白球对称性的长T1、长T2信号;②脑白质受累：11例,表现为双侧大脑半球白质对称云絮状长T1、长T2信号,胼胝体常受累;③皮层受累：6例,表现为双侧大脑半球皮层对称性弥漫长T1、长T2信号。结论：急性CO中毒迟发性脑病MRI表现有一定特征性,MRI对急性CO中毒迟发性脑病的诊断、鉴别诊断、判断预后具有重要价值。     

磁共振弥散加权成像对急性一氧化碳中毒的诊断价值

目的 :评价磁共振弥散加权成像对急性一氧化碳中毒的诊断价值。方法 :回顾性分析 6例急性一氧化碳中毒的MRI表现 ,分别采用SE序列T1WI、T2 WI、FLAIR和DWI。结果 :急性一氧化碳中毒MRI表现为两侧大脑皮层、皮层下区及苍白球T1WI等信号、T2 WI高信号 ,所有异常信号均呈两侧对称性改变。结论 :磁共振弥散加权成像对急性一氧化碳中毒具有重要诊断价值。     

急性一氧化碳中毒后迟发性脑病的MRI研究进展

急性CO中毒后迟发性脑病（DEACMP）是急性CO中毒后最严重的并发症之一,其发病机制迄今不明。MRI能较好的显示DEACMP的脑组织的病理改变有重要的临床应用价值,而功能MR成像技术为该疾病开辟了新的研究方向。本文主要对MRI及功能MR技术在DECAMP中的研究近况予以综述。     

MR扩散加权成像对兔急性一氧化碳中毒后迟发性中毒脑病的预测价值

目的探讨MR扩散加权成像（DWI）对兔一氧化碳（CO）中毒迟发性中毒脑病的预测价值。方法健康大耳白兔60只，用自制CO染毒柜吸入染毒，兔昏迷后停止CO气体通入，保持染毒柜处于密闭状态6h。于染毒前及染毒后1h，3、5、7、15、30、45和60d分别行轴面及矢状面T2WI、轴面T1WI和DWI检查。未出现迟发性中毒脑病症状组（未出现组）的实验兔观察至60d为实验终点；出现了迟发性中毒脑病症状组（出现组）的实验兔观察至30～45d为实验终点。观察兔脑中毒前后大脑皮层ADC值变化规律，探讨ADC值变化与迟发性中毒脑病的关系。结果未出现组15只兔于染毒后1hADC值[（7．58±0．36）×10^4mm^2／s]较染毒前[（8．02±0．35）×10^4mm^2／s]降低（q=0．4441，P〈0．01）；染毒后5d[（7．84±0．39）×10^-4mm^2／s]开始逐渐恢复，染毒后60d恢复至染毒前的水平（P〉0．05）。出现组15只兔在染毒后1hADC值[（7．40±0．32）×10^-4mm^2／s]较染毒前[（8．08±0．32）×10^-4mm^2／s]明显降低（q=0．6728，P〈0．01）。染毒后5d[（7．88±0．44）×10^-4mm^2／s]恢复接近染毒前水平，7d又开始下降，15d下降最明显[（7．29±0．93）×10^-4mm^2／s]，至实验终点未能恢复，染毒后15d较染毒前相比差异有统计学意义（q=0．7850，P〈0．01）。结论ADC值下降程度与脑组织损害程度存在着相关性；急性期ADC值下降程度能预测迟发性中毒脑病的出现可能性，15dADC值再次明显下降提示出现了迟发性中毒脑病。     

表观扩散系数值对急性一氧化碳中毒后迟发性脑病的诊断价值

目的 探讨ADC值对急性CO中毒后迟发性脑病(DEACMP)的诊断价值.方法 回顾件分析经临床确诊的32例DEACMP患者的临床和MR资料,同时选取头颅MRI表现正常的健康志愿者40名作为正常对照组.所有受试者均进行常规MR扫描及DWI,分别对称性测量苍白球、白质(侧脑室周围白质、半卵圆中心)、皮层(额叶、顶叶)的平均ADC值(ADCav).32例DEACMP患者根据常规MRI上有无异常信号分为有异常信号DEACMP组(20例)、无异常信号DEACMP组(12例),所有患者跟踪随访1年以上,13例患者无明显症状,3例偶有轻微头痛、头晕(预后较好组);15例有智能障碍、精神异常,1例反应迟钝、生活不能自理、大小便失禁(预后不良组).DEACMP组与正常对照组、异常信号与无异常信号DEACMP组、无异常信号DEACMP组与正常对照组、预后较好组与预后不良组间各个部位ADC值的比较采用独立样本t检验.结果 32例DEACMP患者20例有异常影像表现.MRI表现可分为3个类型:(1)脑白质受累型;(2)神经核团受累型;(3)皮层受累型.12例常规MRI上无肉眼所见异常信号.32例DEACMP患者ADCav值均下降,ADCav值[侧脑室周围白质(0.62±0.06)×10~(-3) mm~2/s、苍白球(0.67±0.05)×10~(-3)mm~2/s、半卵圆中心(0.57±0.07)×10~(-3)mm~2/s]较正常对照组[(0.74±0.03)×10~(-3)、(0.74±0.04)×10~(-3)、(0.73±0.05)×10~(-3)mm~2/s]降低(t值分别为2.82、2.89、2.98,P值均＜0.01);有异常信号DEACMP组的ADCav值[侧脑室周围白质(0.58±0.08)×10~(-3)mm~2/s、半卵圆中心(0.52±0.09)×10~(-3)mm~2/s]与无异常信号DEACMP组[(0.66±0.05)×10(-3)、(0.62±0.06)×10(-3)mm~2/s]比较,差异有统计学意义(t值分别为4.45、3.98,P值均＜0.01);无异常信号DEACMP组ADCav值[侧脑室周围白质(0.66±0.05)×10~(-3) mm~2/s,半卵圆中心(0.62±0.06)×10(-3) mm~2/s]与正常对照组[(0.74±0.03)×10(-3)、(0.73±0.05)×10~(-3)mm~2/s]比较,差异有统计学意义(t值分别为2.45、3.72,P值均＜0.05).预后不良组ADCav值[侧脑室周围白质(0.56±0.02)×10~(-3)mm~2/s、半卵圆中心(0.50±0.06)×10~(-3)mm~2/s]与预后较好组[(0.63±0.04)×10~(-3)、(0.58±0.05)×10~(-3) mm~2/s]比较,差异有统计学意义(t值分别为6.19、4.12,P值均＜0.01).结论 白质区(尤其是半卵圆中心)ADC值降低对DEACMP诊断具有重要价值,对常规MRI有异常信号的DEACMP患者,定量ADCav值可以量化中毒程度,作为DEACMP的发生、发展及预后评估的参考;对有临床症状而常规MRI上无异常信号患者,ADC值是诊断DEACMP较敏感指标.     

血CK-BB动态变化与一氧化碳中毒迟发性脑病早期诊断的研究

目的 观察重度急性一氧化碳中毒(ACOP)患者血清肌酸激酶脑型同功酶(CK-BB)动态变化及意义。方法 20例重度ACOP患者当天及中毒后3，5，7，10，14，21，30d分别取静脉血检测CK—BB，并与正常对照组进行对照。结果 20例患者血CK—BB在急性期逐渐升高，2～3周时达到高峰，后逐渐下降，1个月时降至正常。本组有2例中毒后第28天和第29天发生ACOP迟发性脑病(DEACMP)，其CK—BB不但不降，反而继续升高，发生迟发脑病后仍高于正常值7—8倍。结论 动态观察ACOP患者血CK—BB的变化有助于DEACMP的早期诊断。     

急性一氧化碳中毒迟发性脑病预后影响因素分析

目的 通过收集急性一氧化碳中毒迟发性脑病(DEACMP)患者的临床资料,分析影响其预后的因素.方法 回顾性分析2003年2月至2007年5月在我科住院的35例DEACMP患者临床资料,6个月～3年后随访其恢复情况,总结出性别、年龄、基础疾病、吸烟、急性期是否高压氧(HBO)治疗、昏迷时间、中毒时间、假愈期、最重时日常生活能力量表(ADL)评分、并发症、HBO治疗次数及神经节苷脂(GM-1)的应用等12个可能影响此病预后的因素.用SPSS10.0软件对数据作X2检验.结果 中毒时间、最重时ADL评分、并发症、HBO治疗次数对预后有一定影响,其中最重时ADL评分及并发症对预后有较大影响;而其余因素对预后影响不大.结论 中毒时间越长、最重时ADL评分越低及病程中出现并发症的患者预后较差,疾病治疗过程中应注意加强患者的护理,减少并发症的发生,并积极进行HBO治疗.     

急性CO中毒与正常人海马体1HMRS对照研究

目的:采用氢质子磁共振波谱成像(1 H-MRS)测量急性一氧化碳中毒(ACOP)患者与正常人海马区代谢物浓度(氮-乙酰天门冬氨酸NAA、胆碱Cho和肌酸Cr)并比较两组的差异.方法:所有受试者分为两组,ACOP组56例,平均年龄(48.9±10.9)岁;对照组27例,平均年龄(49.2±12.5)岁.所有病例均行两侧海马区MRS检查,记录两侧海马区NAA/Cr、Cho/Cr值,采用两个独立样本t检验比较对照组及ACOP组海马体部代谢物比值的差异.结果:ACOP组NAA/Cr值为1.014±0.683,对照组NAA/Cr值为1.697±0.711,差异有统计学意义(P=0.000).ACOP组Cho/Cr值为1.181±0.389,对照组Cho/Cr值为1.148±0.367,差异无统计学意义(P=0.602).结论:采用1 H-MRS可以准确反映ACOP患者海马区代谢物差异,为评估病情的严重性与早期诊断提供影像学支持.     

Non-intentional motor vehicle-related carbon monoxide deaths-revisited

Summary A study of non-intentional, motor vehicle-related, carbon monoxide-related deaths was performed on the case files of the Office of the Medical Examiner of Metropolitan Dade Country in Miami, FL (USA) during the years 1980–1984. A total of 15 cases were collected during that time period. These are presented in some detail. A discussion ensues that compares the similar circumstances of these cases, notably running the engine of an automobile in an enclosed space, with older reports in the literature which emphasized defective vehicle exhaust systems as the leading etiology for these deaths.     

早期高压氧联合激素干预预防一氧化碳中毒大鼠迟发性脑病的实验研究

目的 观察早期高压氧联合激素干预对预防一氧化碳中毒大鼠迟发性脑病(DEACMP)发生的影响,探讨DEACMP的发病机制.方法 46只雄性Wistar大鼠按数字表法随机分成4组:健康对照组(NC组)10只,一氧化碳中毒组(COP组)12只,一氧化碳中毒+高压氧组(HBO组)12只,一氧化碳中毒+ HBO+激素组(DEX组)12只.制备急性一氧化碳中毒动物模型,采用Morris水迷宫评估比较大鼠智力状态,以连续2次逃逸潜伏期延长认定为发生DEACMP,以逃逸潜伏期延长后的平均时间与该大鼠治疗期间共19 d的平均逃逸潜伏时间之差(△逃逸潜伏期)判定DEACMP的严重程度.结果 染毒后各组均出现不同程度逃逸潜伏期延长,总体趋势为染毒后第3天出现延长,第11天达高峰,随后逐渐下降;△逃逸潜伏期:DEX组为(1.24±1.54)s,HBO组为(2.26±1.16)s,COP组为(6.93 ±2.86)s,3组比较差异均有统计学意义(P＜0.05);结论 早期HBO联合激素治疗较单纯HBO治疗能更明显地减轻DEACMP病变的严重程度,支持DEACMP发病的自身免疫学说.     

Homicidal and camouflaged carbon monoxide poisoning in Japan

Summary There were 1,985 fatal cases of CO poisoning in the Thoku district of Japan in the period from 1969 to 1980. Among them, 1,322 cases were suicidal, 662 accidental, and one homicidal, in which a man killed his wife with the self-made CO gas to obtain by fraud a large amount of life insurance. Our nationwide survey revealed four other cases of homicidal CO poisoning and two cases of camouflaged CO poisoning. The police and police surgeons should be cautious enough in cases of CO poisoning.     

高压氧和抗血小板聚集剂预防一氧化碳中毒迟发脑病

目的 观察高压氧（HBO）和抗血小板聚集剂综合疗法对一氧化碳中毒（COP）迟发脑病的预防效应。方法 中，重度急性一氧化碳中毒患者共401例，随机分成HBO治疗组（HBO）组204例和HBO＋抗血小板聚集剂治疗组（HBO＋抗Pla组）197例。HBO治疗压力0.2MPa，每日1次，共20次，在患者COP后第15，20，25，30，45，60天判定是否出现迟发脑病。结果 COP患者401例中，HBO组204例，出现迟发脑病23例，占11．27％。HB＋抗Pla组197例，出现迟发脑病7例，占3．55％。两组比较差异有非常显著性（P＜0．01）。结论 HBO和抗血小板聚集剂综合治疗急性COP，使其迟发脑病的发生率较单纯HBO治疗明显降低，取得显著的预防效应。     

Prognostic value of proton MR spectroscopy of cerebral hemisphere tumors in children

We studied 14 young people with newly diagnosed hemisphere tumors, aged from 3 to 20 years (average 10 years). All underwent surgery following MR imaging (MRI) and spectroscopy (MRS). The tumors studied were three glioblastomas, one each of ganglio-glioblastoma, primitive neuroectodermal tumor (PNET), rhabdoid teratoid tumor, pilocytic astrocytoma, ependymoma, anaplastic ependymoma, and gliomatosis cerebri, and four gangliogliomas. Four patients died; ten patients are alive (five with stable residual tumor, five with no evident tumor). Images and spectra were acquired on a 1.5-T imager. Proton MRS was performed before gadolinium injection in all but one case. Single-voxel techniques were utilized in all cases, using a spin-echo or STEAM sequence with a long echo time (135 or 270 ms). Peak areas of N -acetyl aspartate (NAA), choline (Cho), and creatine and phosphocreatine (Cr) were assessed. The NAA/Cho peak-area ratio was very low in the patients who died (mean ± s. d. 0.20 ± 0.14), and higher in the patients who are alive (0.74 ± 0.47; P = 0.007 by two-tailed t -test). The Cr/Cho peak-area ratio also followed a similar trend for the two groups (mean ± s. d. 0.17 ± 0.07 and 0.49 ± 0.30, respectively; P = 0.01 by two-tailed t -test). Received: 3 February 1997 Accepted: 3 February 1997     

Proton MR spectroscopy in idiopathic spasmodic torticollis

Single-voxel proton magnetic resonance spectroscopy (¹H-MRS), localised to the basal ganglia, was used to determine changes in metabolite levels in idiopathic spasmodic torticollis (IST). We examined nine patients and 13 healthy subjects. The mean values ( ± SD) of peak area ratios were: IST: N-acetyl-aspartate (NAA)/choline-containing compounds (Cho) 1.79 ± 0.39, NAA/creatine and phosphocreatine compounds (Cr) 1.61 ± 0.38, Cho/Cr 0.91 ± 0.19; controls: NAA/Cho 2.07 ± 0.35, NAA/Cr 1.82 ± 0.31, Cho/Cr 0.89 ± 0.12. Statistical analysis showed that NAA/Cho and NAA/Cr were significantly lower in patients than in controls (P = 0.0304 and 0.0431, respectively). These results indicate a reduction in NAA, and suggest striatal involvement in the pathogenesis IST. Received: 8 October 2000 Accepted: 4 December 2000     

Metabolic changes in the thalamus after spinal cord injury followed by proton MR spectroscopy.

Our study followed the changes in thalamic nuclei metabolism, hindlimb sensitivity to thermal stimulation, and locomotor function after spinal cord injury (SCI). MR spectroscopy (MRS) was used to examine the thalamic nuclei of rats 1 day before and 1, 3, 6, and 15 days after SCI or sham surgery. All animals were tested before MRS measurements for motor performance and thermal sensitivity. SCI induced by balloon compression caused complete paraplegia from the first to third day, followed by partial functional recovery during the second week. MRS revealed an increase in N-acetylaspartate (NAA) concentration in the thalamic nuclei on the first day after SCI, which decreased by the third day. The data also showed an increase in inositol (Ins), glutamate, and creatine (Cr) concentrations on the third day postinjury; the Ins concentration remained elevated on the sixth day. In sham-operated animals an increase in NAA concentration was observed on the sixth and fifteenth days after surgery and an increase in Cr concentration on the third day. A positive correlation between Ins concentration and hindlimb sensitivity in both SCI and sham-operated animals suggests changes in glial activity, while changes in NAA levels may indicate the response of thalamic neuronal cells to injury.     

脑梗死~1H-MRS不同序列的对比研究

目的：探讨^1H-MRS在脑梗死患者脑内代谢物浓度差别及应用于脑梗死患者的优化序列参数。方法：对24例脑梗死患者脑内代谢物不同^1H-MRS序列进行对比研究，采用SPSS10．0统计分析软件，分组研究各主要代谢物的信噪比，半高度，相对浓度的差别，结果：脑梗死病灶与健侧之间NAA／Cho,Cho/Cr,Glx/Cr,Lac/Cr差异均有显著性意义（P＜0．05）；其中NAA／Cho,Lac/Cr差异有极显著意义（P＜0．01）。LacSNR25与136、25与272之间差异有显著性意义（P＜0．05）。结论：^1H-MRS可以较好地显示脑梗死病灶病理生理变化，短回波显示乳酸率高，但准确性低，长回波可将Lac与脂质分开。TE＝136、272ms为较佳参数条件。     

高压氧对急性CO中毒大鼠迟发型脑损伤的影响

目的探讨一氧化碳（CO）中毒迟发性脑损伤的病理机制，及高压氧治疗对迟发性脑损伤的作用，为临床治疗提供实验依据。方法参照Ischiropoulos的方法制备急性CO中毒动物模型。采用组织病理学、免疫组织化学等方法检测大鼠染毒后1、3、5、7、14、21d等各时间点脑组织病理改变的特点并与高压氧治疗组比较，以此评价高压氧的治疗作用。通过原位末端转移酶标记（TUNEL）技术方法进行细胞凋亡的检测，观察急性CO中毒及高压氧治疗后神经元凋亡的发生情况。结果急性CO中毒大鼠脑内发生广泛的病理损伤，中毒组大鼠脑皮质、海马和纹状体等部位神经元出现变性坏死，其中大脑皮质、海马等部位损伤较重。TUNEL染色表明，CO中毒大鼠海马神经元发生凋亡，凋亡神经元从染毒后第3天开始显著增加，第7天达到高峰（P〈0．01），以后逐渐减少。CO中毒动物，高压氧治疗组与非治疗组比，脑内神经元变性坏死明显较轻，各时间点海马区损伤均较轻；凋亡神经元数目较少，尤以CO中毒后第5天和第7天明显（P〈0．01）。高压氧促进CO中毒大鼠海马区Bcl-2蛋白表达，尤以CO暴露后第3、5天明显（P〈0．01）。结论急性CO中毒大鼠出现广泛的迟发性神经元损伤，表现为迟发的神经元坏死和凋亡。高压氧治疗可以有效减少神经元变性坏死，促进凋亡抑制基因Bcl-2表达，从而抑制神经元坏死和凋亡。     

火药燃烧致群体一氧化碳中毒的影像学表现及分析

目的：探讨火药燃烧致急性一氧化碳中毒肺、脑损伤的影像学表现．以提高诊断水平。方法：对37例一氧化碳中毒患者行胸部X线、头颅MRI检杏，并分析其影像学表现特点。结果：①急性肺损伤8例，表现为肺纹理增强、肺门浓密和肺部大片状阴影；②脑部损伤6例，表现为对称性海马、苍白球信号异常。结论：肺、脑是急性一氧化碳中毒极易受损的器官，肺损伤以肺水肿改变为主，脑损伤以海马、苍白球水肿、缺血、坏死改变为主。     

肝硬化患者肝移植前后脑代谢改变的MR波谱研究

目的 采用1H-MRS定量分析肝硬化患者肝移植前后脑代谢的变化.方法 选取37例肝硬化患者(患者组)和22名健康志愿者(对照组)进行神经心理学测试及点分辨自旋回波波谱序列(PRESS)MRS,并于肝移植术后1、3个月对18例患者进行随访,测量数字连线试验(NCT-A)、数字符号试验(DST)、符号数字试验(SDT)等神经心理学各指标及后扣带回、左侧基底节MRS各代谢物的含量.采用独立样本t检验比较对照组和患者组术前的神经心理学、MRS各参数;利用方差分析统计肝移植前后神经心理学测试、MRS的变化;用Pearson相关性检验分析各时间点扣带回和左侧基底节MRS各指标与神经心理学测试之间的相关性.结果 (1)移植术前患者组与对照组比较,后扣带回N-乙酰天冬氨酸(NAA)/肌酸(Cr)、胆碱(Cho)/Cr、肌醇(mI)/Cr、谷氨酸复合物(Glx)/Cr分别为1.96±0.21和1.73±0.12、0.65±0.12和0.83±0.09、0.41±0.14和0.72±0.11、2.37±0.38和1.92±0.32,两组差异有统计学意义(t值分别为-5.42、5.96、8.62、-4.72,P值均＜0.01);基底节Cho/Cr、mI/Cr、Glx/Cr分别为0.63±0.16和0.77±0.10、0.38±0.17和0.53±0.21、1. 70±0.36和1.29±0.30,两组差异有统计学意义(t值分别为3.64、3.07、-4.58,P值均＜0.01);(2)患者组的NCT-A测试时间[(5 8.17±19.12)s]明显长于对照组[(37.68±8.02)s],差异有统计学意义(t=4.14,P＜0.01);而DST[(36.67±9.91)分]及SDT[(31.67±9.49)分]成绩明显低于对照组[(55.36±9.27)、(50.73±8.34)分],差异有统计学意义(t值分别为4.60、4.65,P值均＜0.01).移植术后1个月患者组NCT-A、DST、SDT分别为(53.06±12.71)s、(41.89±8.17)、(37.44±7.68)分,术后3个月分别为(35.72 ±5.20)s、(54.39±5.69)分、(49.39±5.65)分,与术前比较差异有统计学意义(F值分别为33.554、85.772、83.061,P值均＜0.01).(3)术后1个月患者组后扣带回NAA/Cr、Cho/Cr、mI/Cr、Glx/Cr分别为1.79±0.19、0.90士0.14、0.39±0.15、1.86士0.32,术后3个月分别为1.66±0.18、0.92±0.08、0.71±0.10、1.75±0.25,与术前比较差异有统计学意义(F值分别为12.658、38.178、75.186、19.420,P值均＜0.01).术后1个月患者组基底节Cho/Cr、mI/Cr、Glx/Cr分别为0.81±0.08、0.47 ±0.25、1.30 ±0.20,术后3个月分别为0.80 ±0.09、0.61±0.27、1.23±0.25,与术前比较差异有统计学意义(F值分别为9.447、8.027、17.952,P值均＜0.01).(4)术前扣带回的mI/Cr与NCT-A及DST、SDT之间具有相关性(r值分别为0.743、0.597、0.615,P值均＜0.01).结论 肝硬化患者脑代谢异常是可逆性的,后扣带回mI/Cr可作为监测肝移植后脑代谢恢复状况的指标.