许尔长 田超 张兰芳 岳凤文 蒋婷

    [摘要]目的：探討低剂量螺旋CT在颌面部骨折诊治中的应用价值。方法：选取2017年10月-2019年10月于笔者医院就诊的60例颌面部创伤患者为研究对象，随机分为常规剂量组(160mAs螺旋CT扫描)30例和低剂量组(30mAs螺旋CT扫描)30例，比较两组图像质量，辐射剂量参数包括容积CT剂量指数(CTDIvol)、剂量长度乘积(DLP)和有效剂量(ED)。结果：两组满足诊断要求的图像比例比较，差异无统计学意义(P>0.05);低剂量组手术发现47处骨折，常规剂量组手术发现49处骨折，两组骨折部位及比例构成无显著性差异(P>0.05)，均以上、下颌骨骨折为主;低剂量组CT三维重建颌面骨折检出率为93.62%，与常规剂量组CT三维重建检出率95.92%比较，差异无统计学意义(P>0.05);低剂量组辐射剂量参数CTDIvol、DLP和ED均显著低于常规剂量组，差异有统计学意义(均P0.05). There were 47 and 49 fractures sites in low-dose group and routine-dose group， respectively. There were no significant differences in fracture sites and proportions between the two groups (P>0.05)， which were mainly on maxillofacial and mandibular fractures. There was no significant difference in detection rate of maxillofacial fractures by 3D CT reconstruction between low-dose group and routine-dose group (93.62% vs 95.92%)(P>0.05). The radiation dose parameters (CTDIvol ......