腹部脂肪的衰减范围与缺血性脑卒中之间的关系

Association of attenuation range for abdominal adipose tissue with cerebral ischemic stroke

目的探讨改变测量腹部脂肪的衰减范围对其与缺血性脑卒中之间关系的影响。方法回顾分析同时有脑CT和/或MRI检查以及腹部64层CT扫描的随机病例40例,其中根据有无缺血性脑卒中分为正常组和病变组各20例。采用容积软件测量L1—2椎间隙水平的腹部脂肪(AAT)、腹腔内脂肪(VAT)和腹壁下脂肪(SAT)。脂肪衰减范围分别为:-245～-45 HU、-195～-45 HU、-145～-45 HU。用Logistic回归来计算脂肪组织中每增加一个标准差的优势比(OR)。结果不同脂肪衰减范围组所对应VAT的OR值基本一致,均>1,95%CI>1,P均<0.05;SAT的OR值基本一致,均>1,95%CI均包含1在内,P均>0.05。结论 64层CT测量腹部脂肪的容积时与缺血性脑卒中的相关性不随脂肪衰减范围变化而改变。

Objective It is to determine whether the associations between abdominal adipose tissue and the cerebral ischemic stroke are altered depending on attenuation range.Methods 40 cases of retrospective analysis with cerebrum examined by CT or/and MR and abdomen scanned by 64-Slice CT at random were made on 20 patients with cerebral ischemic stroke（CIS） and 20 normal controls.According to the different attenuation range of-245 HU--45 HU,-195 HU--45 HU and-145 HU--45 HU,volume of abdominal adipose tissue（AAT）,visceral adipose tissue（VAT） and subcutaneous adipose tissue（SAT） at L1—2 level in two groups were measured by Volume soft.Logistic regression was used to calculate the odds ratio（OR） per SD increase in adipose tissue.Results The difference of VAT on different fat attenuation range was significant.The SAT on various fat attenuation range had no difference（OR values 1,95% CI including 1,P0.05）.Conclusion The strength of association between volumetric VAT and SAT by 64-Slice CT and CIS is not changing with the variation of attenuation range.