儿童鼻窦低剂量ct扫描的应用及适宜扫描参数-第三军医大学学报.doc

儿童鼻窦低剂量CT扫描的临床应用研究 程 广* 张静** 覃文华 卢林民 （*华中科技大学2012级在职研究生，工作单位：广西柳州市妇幼保健院放射科； **通讯作者，工作单位：华中科技大学公共卫生学院） [摘 要]目的 探讨儿童（1-12岁）鼻窦低剂量CT扫描的临床应用。方法 300例行鼻窦CT检查的患儿（1-12岁）随机分为三组，分别行低剂量（100kV,40mA)(100kV,25mA）和常规剂量（100kV,100mA）扫描，扫描结束后设备自动显示CTDIw（剂量指数），比较三组的CTDIw；对各组CT图像的窦口鼻道复合体进行评分及统计学分析。结果 低剂量组的CTDIw与常规剂量组相比较，40mA组下降约59.97%，25mA组下降约74.95%；40mA组的CT图像质量与常规剂量组相比较，差异无统计学意义（P=0.355），25mA组的CT图像质量与常规剂量组相比较，差异有统计学意义（P=0.000）。结论 儿童鼻窦CT检查时，实行低剂量扫描可以有效地降低辐射剂量，（100kV,40mA)的扫描参数较为适宜。 ? [关键词] 儿童；鼻窦；窦口鼻道复合体；低剂量；CTDIw Clinical application of low dose CT scanning of the paranasal sinuses in children Cheng Guang，Zhang Jing，Qin Wen-hua，Lu Lin-min Department of Radiology,Guangxi Liuzhou Maternal and Child Health-Care Hospital, Guangxi，China [Abstract] Objective To explore the clinical application of children (1-12 years old) with low dose CT scanning of the paranasal sinuses. Methods 300 cases of sinus CT examination of children (1-12 years old) were randomly divided into three groups, respectively, and low dose(100kV, 40mA) (100kV, 25mA) and conventional dose (100kV, 100mA) scanning, equipmentdisplay CTDIw automatic scanning is finished , compared with three groups of CTDIw to each CT， the image of the ostiomeatal complex scoring and statistical analysis.Results low dose group of CTDIw and conventional dose group compared with 40mA group,25mA group decreased by about 59.97% and 74.95%. the image quality of CT 40mA group was compared with the conventional dose group, no significant difference (P=0.355),the image quality of CT 25mA group was compared with the conventional dose group, the difference was statistically significant (P=0.000). Conclusion children paranasal sinus CT examination, a low dose scan can effectively reduce the radiation dose, (100kV, 40mA) of scanning parameters more suitable. [Key words] Children,Sinus,Low dose,Ostiomeatal complex,CTDIw 儿童鼻窦炎症的首选检查为CT扫描，儿童的身体器官发育尚未成熟，且晶状体、甲状腺等器官对射线极为敏感，患儿鼻窦CT扫描时有遭受晶状体透亮度下降、甚至白内障【1】的风险。故儿童鼻窦CT检查时，实行低剂量扫描非常必要。 1 资料与方法 1.1 一般资料