机构地区:[1]南昌大学第一附属医院影像科,江西南昌330006 [2]Department of Neuroradiology,Keck School of Medicine,University of Southern California [3]南京大学医学院附属鼓楼医院放射科 [4]复旦大学附属中山医院放射科
出 处:《实用放射学杂志》2010年第6期790-794,共5页Journal of Practical Radiology
摘 要:目的 研究在复发-缓解型多发性硬化(RRMS)中通过Hofer's 新分区方案的表现正常胼胝体部分各向异性(FA)值的定量改变.方法 采集35例临床确诊的RRMS患者和35例年龄、性别匹配的健康对照定量弥散张量成像(DTI)数据.比较RRMS患者和对照组胼胝体Hofer's新分区方案不同区域的FA值改变及其与脑实质分数(brain parenchymal fraction, BPF)、T2病灶容积之间的关系.结果 在健康志愿者中,Hofer's新分区方案FA值组内比较差异具有统计学意义(P<0.001),FA(区Ⅴ)>FA(区Ⅰ)>FA(区Ⅳ)>FA(区Ⅱ)>FA(区Ⅲ) 在RRMS患者中同样观察到这些区域的FA值具有不均一性:FA(区Ⅴ)>FA(区Ⅰ)>FA(区Ⅱ)>FA(区Ⅲ)>FA(区Ⅳ) RRMS患者区Ⅱ(F=4.159,P=0.046)、区Ⅲ(F=9.257,P=0.004)、区Ⅳ(F=12.234,P=0.001)的FA值较健康对照组明显降低 胼胝体的区Ⅴ的FA值同样出现降低趋势,但无统计学意义(P=0.179) 胼胝体的区Ⅰ的FA值未见明显改变(P=0.787).在Hofer's新分区方案中,胼胝体组内FA值和BPF之间(P值范围:0.086~0.969)、FA值和T2病灶容积之间(P值范围:0.127~0.658) 均无相关性.结论 RRMS患者的表现正常胼胝体 (区Ⅱ、区Ⅲ、区Ⅳ) 存在微观病理改变,这些改变可能和胼胝体原发性缺血、局部微病灶等因素有关.Hofer's新分区方案的DTI分析有助于更好地理解RRMS临床变化.Objective To investigate the utility of quantitative diffusion tensor imaging (DTI) in elucidating the pathogenesis of the patients with normal- appearing corpus callosum (NACC) by Hofer' s new scheme in relapsing- remitting multiple sclerosis (RRMS). Methods MR quantitative DTI data were acquired in 35 cases with RRMS confirmed clinically patients and 35 age/gender -matched healthy adult controls. Fractional anisotropy (FA) values of the NACC based on Hofer's regions were compared between the patients and controls. Spearman's rank correlation coefficients were calculated using brain parenchymal fraction (BPF)/T2 lesion volume and FA values measures in each regions of Hofer' s new scheme. Results (1) There was FA heterogeneity in the corpus callosum(CC) subdivisions of Hofer's new scheme in healthy volunteers and RRMS patients: FA( regions Ⅴ)〉FA( regions Ⅰ)〉FA( regions Ⅳ)〉FA ( regions Ⅱ ) 〉 FA ( regions Ⅲ ), FA ( regions Ⅴ)〉 FA ( regions Ⅰ ) 〉 FA ( regions Ⅱ ) 〉 FA ( regions Ⅲ)〉 FA ( regions Ⅳ), respectively; (2) FA in the RRMS group was significantly decreased in the regions Ⅱ(F=4. 159,P=0. 046), regions Ⅲ(F= 9. 257, P=0. 004) and regions Ⅳ( F= 12. 234, P= 0. 001) of Hofer's new scheme;(3) the FA of the regions Ⅰ was relatively intact in the patients with MS compared to the healthy age-matched controls(P-O. 787), while the regionsⅤ showed no significant trend of reduced FA values(P=0. 179). The decrease in FA in every of the NACC subdivisions did not correlate with BPF(P=0. 086- 0. 969)or T2 lesion volume ( P There is occult injury of NACC : 0. 127-0. 658 ) . Conclusion in RRMS patients , which is likely due to focal, microscopic T2 -invisible lesions. FA values in CC subdivisions of Hofer's new scheme may represent a rewarding strategy for understanding the subtle clinical deficits of patients with RRMS.
关 键 词:脑 胼胝体 复发-缓解型多发性硬化 磁共振成像 部分各向异性
分 类 号:R742[医药卫生—神经病学与精神病学] R445.2[医药卫生—临床医学]
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