The Diagnostic Value of MRI Examination at Different Angles of Flexion Position for Anterior Cruciate Ligament Rupture of the Knee Joint
Objective To explore the diagnostic value of MRI examination at different angles of flexion position for anterior cruciate ligament(ACL)rupture in the knee joint.Methods With the selection of 81 patients with knee joint injuries scheduled for knee arthroscopy examination who were admitted to the hospital from March 2022 to December 2023 as the research subjects,all patients underwent 17° flexion and 30° flexion MRI examination at admission,and knee arthroscopy was performed at the appropriate time.With knee arthroscopy examination results as the gold standard,the diagnostic value of MRI examination at different angles of flexion for knee ACL rupture was analyzed.Meanwhile,the visualization scores of ACL structures(total length,stump and lateral and internal tract)on MRI examinations at different angles of flexion position were compared.Results The results of knee arthroscopy showed that 52 out of 81 patients had ACL rupture in the knee joint.Based on the results of knee arthroscopy as the gold standard,the sensitivity,specificity,accuracy,positive predictive value,and negative predictive value of 17° flexion MRI examination for the diagnosis of ACL rupture in the knee joint were 84.62％,89.66％,86.42％,93.62％,and 76.47％,respectively,and the sensitivity,specificity,accuracy,positive predictive value,and negative predictive value of 30° flexion MRI examination for the diagnosis of knee ACL rupture were 96.15％,93.10％,95.06％,96.15％,and 93.10％,respectively.The diagnostic sensitivity of MRI examination in 30° flexion position was higher than that in 17° flexion position,and the difference was statistically significant(P＜0.05);There were no statistically significant differences in the specificity,accuracy,positive predictive value,and negative predictive value of MRI examinations at different angles of flexion position(P＞0.05).The consistency between the diagnostic results of knee ACL rupture by MRI examination at different angles of flexion position and the results of knee arthroscopy examination was excellent(Kappa＞0.75).The visualization scores of the total length,stump and lateral and internal tract of the knee ACL in 30° flexion MRI examination were higher than those in 17° flexion MRI examination,and the differences were statistically significant(P＜0.05).Conclusion The diagnostic specificity and accuracy of different angles of flexion MRI examination for knee ACL rupture were high,but the sensitivity of 30° flexion examination was higher,and it had certain advantages in displaying the structure of knee ACL.
Magnetic resonance imagingFlexion positionKnee joint traumaAnterior cruciate ligament ruptureDiagnostic value
万方数据
维普
