脑白质

Without any other methods can measure the character of the live white matter presently, DTI has great significance for the study of the anatomization of the brain and the diagnosis of the diseases of white matter.

根据此特性，DT-MRI技术在显示脑白质的微观组织结构和纤维束走向等方面具有极大的优越性，作为目前唯一的非侵入性分析大脑内部结构的重要工具，DT-MRI已经在中风、老年痴呆症、精神分裂症、脑缺血以及多发性硬化症和其他一些脑部肿瘤的研究和诊断中发挥了重要的作用。

Results:CT findings in 25 cases were bilateral symmetric hypodense in the region of the basal ganglia (putamen,pallidum, and or caudate nucleus).The lesiors might be combined with the white matter hypodense lesions, cerebral atrophy, encephalomalacia,oval or patch in shape.

结果：2 5例脑CT扫描均显示为双基底节对称性低密度影，呈圆形或斑片状，可伴有脑白质低密度病变、脑萎缩、脑软化。

The head other result brain tumor pledges fasciculus can have in DTT in vain the following 3 kinds of expression:(1) is interrupted,(2) shift,(3) soak.

结果脑肿瘤旁脑白质纤维束在DTT可有以下3种表现：(1)中断，(2)移位，(3)浸润。

Their ages ranged 6 to 13 years. Their EEGs were characterized by continuous spike-and-wave discharges during non-rapid eye movement sleep, accounting for 85%-100% of the period of NREM sleep. Clinically, these children had various types of epileptic seizures and exhibited different degrees of neuropsychiatric impairments, language dysfunction, and/or behavioral disturbances. Neuroimaging abnormalities were found in 6 cases, including atelencephalia or atrophy, gray matter heterotopia and leucomalacia. CONCLUSIONS: This study indicates the characteristics of CSWS syndrome in clinical manifestations, EEG and neuroimaging examinations.

结果：9例患儿的视频脑电图结果符合CSWS诊断标准，年龄6~13岁，脑电图表现为棘慢复合波在整个非快速眼动睡眠期几乎持续存在，其放电时间占整个NREM期的85%~100%；临床上患者表现不同类型的癫癎发作，在神经精神方面存在不同程度的损害，存在言语和/或行为障碍；其中6例患儿显示有神经影像学异常，包括脑发育不全或萎缩、灰质异位、脑白质软化等。

objective to obtain the diffusion tensor maps of the normal human brain,and assess intrinstic properties of water diffusion in quantitative parameters for an anatomic analysis.methods maps of isotropic apparent diffusion coefficient and various anisotropic maps were calculated in60healthy adults from seven diffusion imagings by using single-shot echo-planar diffusion-weighted sequence.brain parenchyma anatomy was analyzed and adciso and various anisotropic index were measured.results （1）diffusion properties of different tissues and anatomic areas of normal adult human brain are different.diffusion in white matter is anisotropic;diffusion in gray matter is isotropic.

目的 获取正常人脑组织扩散张力性图像（diffusion densor imaging，dti），定量分析正常人脑组织水扩散的内在特性，进一步评价脑解剖结构。方法 60例健康正常人，应用单次激发epi-dw序列，计算出adciso图及各向异性图，分析脑实质不同区域的解剖结构，测量adciso（isotropic apparent diffusion coefficient）及各向异性指数。结果（1）脑内不同组织结构弥散特性不同，脑白质弥散表现为各向异性，而脑灰质弥散表现为各向同性。

Results:All of the cases studied,38 cases were abnormal(82.6%).Their magnetic resonance imagings manifested encephalatrophy、leukodystrophy、cerebromalacia、cerebral maldevelopment,and infections of the central nervous system.

结果：46例中，MRI异常38例(82.6%)，脑萎缩、脑白质病变、脑软化灶、先天畸形、中枢神经系统感染等是脑性瘫痪常见的MRI异常表现。

Results:CT scans of 68 cases with DAI of early phase showed one or more small hemorrhagic lesions at white matter 49 cases(including cerebral hemisphare 37 cases,based node 4,copus collosum 6,brain stem 2),SAH 17,interventricular hemorrhage 5, and brain swelling 58 cases.

结果：脑白质内单发或多发小出血灶49例(大脑半球37例，基底节区4例，胼胝体6例，脑干2例)，蛛网膜下腔出血17例，脑室出血5例，弥漫性脑肿胀58例。

The dogs brain before and at 2, 4, 8, 10 and 12th week after irradiation. ADC values of alba and ectocinerea were measured respectively. The histological changes were observed under light and electron microscope.

分别对照射前和照射后第2、4、8、10、12周犬脑进行MRI T1WI、T2WI和DWI检查，分别测量犬脑脑白质、脑灰质ADC值，并通过光镜和电镜观察其组织学改变。

These disorders include more than 45 rare diseases, such as Krabbe disease, Hurler syndrome, Adrenoleukodystrophy, Metachromatic Leukodystrophy, Tay-Sachs disease, Sandhoff disease and a host of others.

这些紊乱包括多于45种的罕见疾病，比如克拉伯病，脂肪储积症，肾上腺脑白质失氧症，异染性白质营养不良，家族性白痴病，桑德霍夫氏病等等。

The typical response of brain alba to kinds of destructive stimulus is the change in medullary sheath.

脑白质病是一种常见而又易被忽视的疾患，脑白质对各种有害刺激的典型反应是髓鞘的变化。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。