颞叶癫痫~1H-MRS和DWI的变化及其相关性研究

目的 探讨~1H-MRS和DWI在反映海马硬化病理结构改变中的价值.方法 采用3.0T磁共振扫描仪对12例伴有单侧海马硬化的发作间期颞叶癫痫(TLE)患者及12例正常对照者行单体素~1H-MRS及DWI检查.比较海马N-乙酰天门冬氨酸/肌酸+胆碱NAA/(Cr+Cho)]值,表观弥散系数(ADC)值在患侧、对侧和对照组之间的差异,分析NAA/(Cr+Cho)和ADC值之间的相关性.结果 TLE患者患侧海马NAA/(Cr+Cho)值低于对侧海马及对照组;发作间期海马ADC值高于对侧海马及对照组;患侧海马NAA/(Cr+Cho)和ADC值之间存在相关性(r=-0.79,P=0.002).结论 TLE患者患侧发作间期海马NAA/(Cr+Cho)值降低,ADC值升高,两者之间呈显著的负相关;~1H-MRS联合DWI可在活体无创反映海马硬化的病理结构改变.

Study of 1H-MRS and DWI in the Temporal Lobe Epilepsy

Objective To study the value of~1H-magnetic resonance spectroscopy(~1H-MRS) and diffusion weighted imaging(DWI) in evaluating the changes of pathological structures of hippocampal sclerosis.Methods Twelve normal controls and twelve cases with temporal lobe epilepsy were examined by conventional MRI,~1H-MRS and DWI.The NAA/(Cr+Cho) ratios and ADC values in the hippocampus were measured and compared between patients and normal controls.Results The NAA/(Cr+Cho) ratios of hippocampus in patients with hippocampal sclerosis were significant decrease in comparison with controls and the contralateral side,and the ADC values were also significant increase.There was correlation between the NAA/(Cr+Cho) ratios and ADC values in the disordered hippocampus(r=-0.79,P=0.002).Conclusion There is a significant correlation between the NAA/(Cr+Cho) ratios and ADC values in the hippocampal sclerosis.~1H-MRS and DWI capture partially complementary aspects of hippocampal pathology noninvasively in vivo.