多层螺旋CT的MPR及VR重建技术对外伤性肋骨骨折的诊断价值OA

Objective To explore the diagnostic value of multiplane reconstruction(MPR)and volume rendering(VR)techniques of multi-slice spiral CT(MSCT)for traumatic rib fractures.Methods A retrospective analysis was conducted on the MSCT images of 90 patients with traumatic rib fractures who were treated at West China Longquan Hospital of Sichuan University from January to October 2022.The axial images with thin lamina were combined with MPR and VR reconstruction images for diagnosis,and the diagnostic value of the two reconstruction techniques for rib fractures was compared.Results A total of 371 rib fractures were found in 90 patients,including 254 dislocation fractures.The diagnostic sensitivity rates of MPR and VR were 98.03%(249/254)and 96.85%(246/254),respectively,with misdiagnosis rates of 0.40%(1/250)and 0.40%(1/247).The sensitivity and misdiagnosis rates of MPR and VR in the diagnosis of rib dislocation fractures were compared,without statistically significant differences(P>0.05).The diagnostic sensitivity of MPR and VR for 117 non-dislocation fractures was 88.03%(103/117)and 74.36%(87/117),respectively,with misdiagnosis rates of 2.83%(3/106)and 5.43%(5/92).The diagnostic sensitivity of MPR and VR for total rib fractures was 94.88%(352/371)and 89.76(333/371),respectively,with misdiagnosis rates of 1.12%(4/356)and 1.77%(6/339).The sensitivity of MPR in the diagnosis of non-dislocation fractures and total fractures was higher than that of VR,with statistically significant difference(P<0.05),but without statistically significant difference in terms of misdiagnosis rate(P>0.05).The average diagnostic time of VR(174.59±21.64)s was shorter than that of MPR(211.66±27.70)s,with statistically significant difference(P<0.05).Conclusion VR images have shorter diagnostic time,and MPR is more sensitive to non-dislocation fractures.Reasonable use of the two reconstruction techniques can improve the diagnostic efficiency and accuracy of rib fractures.