摘要
目的 探讨颅面部联合外伤患者不同剂量CT扫描影像学表现及诊断效能.方法 选取本院收治的 180例颅面部联合外伤患者作为观察对象,均行常规剂量CT检查,后将观察对象根据CT剂量随机分为(A、B、C)三组,各60 例.A组较常规剂量降低 10%、B组较常规剂量降低 20%、C组较常规剂量降低 30%.比较三组辐射参数[容积CT剂量指数(volume ct dose index,CTDIvol)、剂量长度乘积(dose-length product,DLP)、有效剂量(effective dose,ED)]、图像质量评分、平均CT值、信噪比、图像噪声、影像学表现及定性诊断结果.结果 1)C组CTDIvol、ED及头颅部、面部DLP(17.12±3.25)mGy、1.31±0.34、(246.67±23.85)mGy·cm、(233.46±24.18)mGy·cm 均<B 组(21.28±3.86)mGy、2.42±0.39、(334.46±27.17)mGy·cm、(302.25±26.82)mGy·cm<A 组(27.94±4.01)mGy、3.08±0.41、(402.28±33.46)mGy·cm、(395.12±30.33)mGy·cm<常规剂量(46.15±5.38)mGy、5.20±0.48、(788.87±46.18)mGy·cm、(648.89±35.56)mGy·cm,差异均有统计学意义(P<0.05);2)三组扫描图像质量、薄层重建图像质量评分、平均CT值、图像噪声、信噪比与常规剂量比较差异均无统计学意义(P>0.05);3)三组影像学表现所占比例与常规剂量比较差异无统计学意义(P>0.05);4)三组颅骨骨折、颌面部骨折、鼻窦骨折、鼻骨骨折定性诊断结果比较差异均无统计学意义(P>0.05).结论 不同剂量CT扫描普遍适用于颅面部联合外伤患者扫描成像与定性诊断,其中较常规剂量降低 30%的CT剂量可显著降低颅面部辐射剂量,实现颅面部一体化三维影像,为临床诊治患者提供有效的影像学信息.
Abstract
Objective To investigate the imaging findings and diagnostic efficiency of different dose Computed tomography(CT)in patients with combined craniofacial trauma.Methods A total of 180 patients with combined craniofacial trauma admit-ted to our hospital were selected as research objects.All of them underwent routine dose CT examination.The subjects were ran-domly divided into three groups according to the CT dose,with 60 cases in each group.Group A was reduced by 10%,group B by 20%,and group C by 30%compared with conventional dose.The radiation parameters[Volume CT dose index(CTDIvol)],dose-length product(DLP)and effective dose(DLP),image quality score,average CT value,signal-to-noise ratio,image noise,imaging findings and qualitative diagnosis results of the three groups were compared.Results 1)CTDIvol(17.12±3.25)mGy,ED 1.31±0.34,cranial DLP(246.67±23.85)mGy·cm,and facial DLP(233.46±24.18)mGy·cm in group C were lower than those,i.e.,(21.28±3.86)mGy,2.42±0.39,(334.46±27.17)mGy·cm,(302.25±26.82)mGy·cm in group B,(27.94±4.01)mGy,3.08±0.41,(402.28±33.46)mGy·cm,(395.12±30.33)mGy·cm in Group A,and(46.15±5.38)mGy,5.20±0.48,(788.87±46.18)mGy·cm,(648.89±35.56)mGy·cm(P<0.05)in conventional dose,corre-spondingly;2)There were no significant differences in scanning image quality,thin-layer reconstruction image quality score,average CT value,image noise,signal-to-noise ratio between the three groups and the conventional dose(P>0.05);3)There was no significant difference in the proportion of imaging findings between the three groups and the conventional dose(P>0.05);and 4)There was no significant difference in the qualitative diagnosis results of skull fracture,maxillofacial fracture,si-nus fracture and nasal bone fracture among the three groups(P>0.05).Conclusion Different doses of CT are widely used in the scanning imaging and qualitative diagnosis of patients with combined craniofacial trauma,in which the dose of CT reduced by 30%compared with the conventional dose can significantly reduce the radiation dose of the head and face,realize the three-dimensional image of the head and face integration,and guide the clinical diagnosis and treatment.
基金项目
河北省承德市科学技术课题支撑项目(202109A181)
NETL
NSTL
万方数据