MRI Study on Knee Meniscus and its Injuries / 实用放射学杂志

ABSTRACT

Objective To study MRI findings of both normal and injured knee meniscus.Methods MRI in twenty-six cases (n=32) with meniscal injuries proved by surgery,or by arthroscopy or by clinical examinations and in 15 cases of normal knee menisci were observed.Results The results showed that normal knee menisci,were triangular low signal intensity on T_1WI and T_2WI.Thirty-two injured meniscal injuries included 15 medial injuries,11 lateral injuries and 3 cases(n=6) of bilateral injuries.32 injured menisci according to the Stoller's four-grade classification as followedgrade 0 in 0,grade one in 6,grade two in 12 and grade three in 14.Eighteen cases were complicated by meniscus cyst in 6,medial accessory ligament injury in 10,lateral accessory ligament injury in 9,anterior cruciate ligament injury in 7,posterior cruciate ligament injury in 6,bone bruise in 8,fracture in 5,intracapsular hydrops and ecchymosis in the soft tissues around the knee in 6.Conclusion MRI can clearly show the anatomical structure of knee meniscus and accurately dagnose meniscal injuries and its complications.