3.0T MR Diagnosis of Articular Cartilage Lesion:Compared with Arthroscopy

Objective:By arthroscopy discuss MRI in the distal femoral bone bruise in articular cartilage damage diagnosis to the role.Methods:Using arthroscopy on October 2010-March 2012 were treated by MRI imaging,MRI image 3 d reconstruction processing,display distal femoral bone bruise in the articular cartilage injury 22 cases,which combined the tibia near end a bone bruise in 3 cases,accompanied by the lateral meniscus injury in 7 cases,12cases were diagnosed have anterior cruciate ligament rupture,4cases of anterior cruciate ligament and medial collateral ligament tear damage,in surgical treatment and observation articular cartilage injury.Results:The distal femoral bone contusion patients see arthroscopic knee joint cartilage damage and MRI shows basic anastomosis,3 D fat suppression steady-state precession fast image sequence(fat-saturatedthree-dimensional fast imaging with steady-state procession,FS-3 D-FISP) were 91.3% and 96.8%,respectively) for,Kappa value is 0.812,SE-T1WI were 71.7% and 97.9%,respectively) for,Kappa value is 0.514.Conclusion:FS-3 D-FISP sequence for knee distal femoral bone bruise in the articular cartilage damage diagnosis accuracy is obviously superior to the SE-T1WI,MRI and articular cartilage damage to mirror the diagnosis of disease has a good consistency between the results,but1.0 cm2 cartilage damage area MRI sometimes can't real performance,cartilage damage area and MRI signal change range of Ⅰ positively ratio,degree of cartilage damage arthroscopic no positive found that,because MRI fuselage volume effect difference,in some cases articular cartilage injury severity cannot really reflect,the subchondral bone and bone marrow in abnormal signal is articular cartilage damage important indirect signs.