低剂量CT(100 mAs)模式在成人颅内出血复查中的应用价值

The Application Value of Low-dose CT(100 mAs) Model in the Reexamining of Adult Head with Intracranial Hemorrhage

目的：评价低剂量CT（100 mAs）模式在成人颅内出血患者复查中的应用价值。方法：随机对35例成人颅内出血行CT复查患者，采用常规模式扫描（Ⅰ组）后，加用低剂量（100 mAs）扫描（Ⅱ组），以Ⅰ组为参照，对Ⅱ组图像进行评分以及诊断效能评价。结果：两组图像质量比较差异有统计学意义（P〈0.05），但Ⅱ组辐射剂量较Ⅰ组降低66.7%；血肿等病灶在Ⅱ组图像的不可诊断构成比小于10.1%，腔梗等病灶的不可诊断构成比为30.0%-36.4%。结论：低剂量CT（100 mAs）模式在降低患者辐射上意义明显，且能基本满足临床对成人颅内出血患者复查的主要目的，可以与常规扫描模式交替使用。

Objective：To assess the application value of CT low-dose （100 mAs） model for scanning adult head with intracranial hemorrhage in follow up cases.Method：35 adult patients with intracranial hemorrhage who need follow up CT scans were chosen with random method for a study of low-dose CT.After scans of the standard-dose（groupⅠ）,the low-dose （100 mAs） model were scaned（GroupⅡ）.Based on groupⅠas reference,the evaluation and diagnosis efficiency of groupⅡimages were assessed.Result：The two groups had significant difference in image quality（P〈0.05）,but the groupⅡradiation dose decreased by 66.7%compared with groupⅠ.The no diagnosis constituent ratio of hematoma and other lesions were less than 10.1%in groupⅡimages,lacunar infarction and other lesions were about 30.0%-36.4%.Conclusion：It’s significant to reduce radiation on patients with low-dose CT （100 mAs） model.And it can basically meet the main purpose of adult patients with clinical follow-up of intracranial hemorrhage.It can be used with the standard-dose CT scanning mode in turn.