磁共振联合常规CT在骨细胞瘤筛检及诊断中的价值探讨OA

Objective:To investigate the value of magnetic resonance(MR)combined with conventional CT in the screening and diagnosis of osteoblastoma.Methods:80 patients with highly suspected osteoblastoma in our hospital from April 2020 to April 2023 were selected as research objects.All patients underwent MR and conventional CT examination.The examination results and imaging findings of MR And conventional CT were analyzed,and pathological examination results were taken as the gold standard.The diagnostic efficiency was compared.Results:66 were positive and 14 were negative in 80 patients with highly suspected osteoblastoma.The lesions were mainly concentrated in the distal femur,proximal tibia,distal flexion and proximal humerus.The main signs of MR were clear boundary,uneven low,equal signal of T1WI sequence,uneven low,equal,high mixed signal of T2WI sequence.The main signs of conventional CT were cystic dilatation and destruction area,thinning or interruption of bone cortex,bone ridge and soft tissue density shadow in tumor.The results of MR combined with conventional CT were better consistent with gold standard(Kappa=0.726)than those of MR or conventional CT alone(MR Kappa=0.535;conventional CT Kappa=0.561).The sensitivity,accuracy and negative predictive value of MR combined with conventional CT for the diagnosis of osteoblastoma were higher than those of MR alone or conventional CT,the differences were statistically significant(P<0.05),while the specificity and positive predictive value were higher than those of MR alone or conventional CT,the differences were not statistically significant(P>0.05).Conclusion:Long bone is the most frequent site of osteoblastoma,MR and conventional CT can better present the pathological information of osteoblastoma,MR is more advantageous in identifying the relationship between osteoblastoma and surrounding soft tissues,nerves and blood vessels,CT can detect bone destruction and internal tissue invasion,and the combination of the two metheds can improve the sensitivity and accuracy of diagnosis,and it can provide comprehensive reference for the doctor's follow-up diagnosis and treatment.