Low-field MRI in diagnosis of knee meniscus injuries

Objective: To improve the diagnosis of knee meniscus injury with low-field MRI.Methods: Twenty patients with knee meniscus injures were examined by MRI.All the subjects were scanned by T1WI(SE) in coronal and cross-section,T2WI(SE) in cross-section,T2(dual-echo) and protron density weighted image in sagittal plane,and STIR in coronal plane.The knee meniscus injuries were divided into 0-3 levels by the MRI signal.Results: Of the forty knee meniscus injuries,thirty-four(85%) were diagnosed as level 3,four(10%) were diagnosed as level 2 and two(5%) were diagnosed as level 1.The morphous of injured knee meniscus was varied.High signals could be found in MRI and all were confirmed by operation.Conclusions: As long as the method is proper,low-field MRI can also diagnose meniscal injuries accurately.