统计参数图软件对Alzheimer病患者脑PET图像的初步分析

Study of Positron Emission Tomography Scanning Image of Alzheimer's disease with SPM Software

目的 探讨阿尔茨海默病 (AD)患者脑葡萄糖代谢特点及正电子发射计算机断层扫描(PET)对AD的诊断价值。 方法 应用统计参数图 (SPM)软件对 13例AD患者和 13例年龄、性别和文化程度相匹配的健康对照者脑PET检查结果进行处理分析。 结果 (1)健康老年人可出现顶叶葡萄糖代谢的减低 ,但程度较轻 ;AD组全脑葡萄糖代谢减低 ,以顶叶为最明显 ,其次为颞叶 ,再次为额叶 ;(2 )AD组扣带回 31、2 3、7、30区 ,顶枕 4 0、39区 ,颞叶 2 0区和额叶 9、6、8区等部位葡萄糖代谢减退较明显 ,差异有显著性 (P <0 0 5、0 0 0 1)。降低区域双侧基本对称 ,但额叶和颞叶的降低区左侧明显大于右侧。 结论 AD患者脑葡萄糖代谢普遍性降低 ,个别脑区较为明显。扣带回的 31、2 3、7、30区 ,顶枕的 4 0、39区 ,颞叶的 2 0区和额叶的 9、6、8区等部位的葡萄糖代谢半定量指标降低可作为诊断AD的重要依据之一。

Objective To study the feature of regional cerebral metabolism rate of glucose (rCMRglc) in patients with Alzheimer’s disease (AD) and the value of positron emission tomography (PET) scanning in diagnosis of AD. Methods 13 AD patients and 13 health controls ,Who matched in age,sex and education years,were scanned with PET. Results (1) Watching by naked eyes,there was mild decreasing of rCMRglc at parietal lobe in healthy elders. While in AD patients,there was widely decreasing of cerebral metabolism rate of glucose. The most significant region was parietal lobe, the next was temporal lobe,and the last was frontal lobe. (2) Detecting with PET and dealing with statistical parametric mapping (SPM) of 99 software,there was more significant decreasing of rCMRglc in regions 7,23,30,31 of cingulate gyrus,region 39 and 40 of pario-occipital lobe,region 20 of temporal lobe and region 6,8,9 of frontal lobe in AD group( P <0.05,0.01). There was a larger rCMRglc decreasing area in the left cerebral hemisphere than that in the right. Conclusions There is universal decreasing of rCMRglc in AD. There is a significant decreasing of rCMRglc in some regions. These regions' dysfunction may induce symptoms of AD,such as cognitive impairment,personality change,behavior and psychological symptoms of AD patients. Decreasing of rCMRglc in some brain regions can be considered as one of the evidences in the diagnosis of AD.