Objective To evaluate the value of diffusion-weighed MRI in the functional study of liver in acute virus hepatitis.Methods Twenty volunteers as control group and 56 patients with acute virus hepatitis(AVH) were underwent Diffusion-weighted MR imaging in a dehydrated state.In AVH group,26 cases with normal functional study of liver and 30 cases with normal functional study of liver.Apparent diffusion coefficient(ADC) value of each liver of all groups was measured and compared of their relationships with transaminase.Results The ADC values in normal functional study of liver and innormal functional study of liver were higher than those of control group in different b values(200,400,600 s/mm2),there was statistical meanings.The ADC values in normal functional study of liver showed a positive correlation with transaminase.Conclusion Diffusion-weighed MRI imaging have the potential for use as a noninvasive means to explore the functional study of liver in patients with AVH.

目的探讨不同年龄老年人腰椎2-4骨质密度的CT值范围.方法测量286例60～80岁老年人腰椎CT值.其中男98例,女1 88例.结果随年龄增长骨密度CT值下降,女性较男性更明显.结论骨质疏松与年龄呈正相关系,不同年龄段的老年人应有其不同的骨密度CT参考值,CT定量测定老年人骨密度在预防老年性骨质疏松性骨折提供了较好的参考.