CT imaging findings and diagnostic efficacy of different doses in patients with combined craniofacial trauma

BAN Minghui; TAO Xiaofei; LI Yaxin

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.