The use of Magnetic Resonance Imaging (MIR) as a diagnostic trial in thepathology of the knee, has become an important non invasive alternative. We have designeda double blind protocol with the Department of Radiology through we have evaluated 31 patientsanalyzing the MRI results in relation with the arthroscopic findings. For the medialmeniscus, the accuracy of the MRI was 9 3% and 87% for the lateral. As main conclusions,the sensibility was 90% for the medial meniscus and 75% for the lateral one and about specificity,we found a result of 100% for the medial meniscus and 9 1% for the lateral. The negative andpositive predictive values were respectively 85% and 100% for the medial and 8 4% and 75%for the lateral. We noted more diagnostic difficulties in the anterior portion of lateral meniscusand lack of precission in the determination of the type and extension of the meniscal injury.

The use of Magnetic Resonance Imaging (MIR) as a diagnostic trial in thepathology of the knee, has become an important non invasive alternative. We have designeda double blind protocol with the Department of Radiology through we have evaluated 31 patientsanalyzing the MRI results in relation with the arthroscopic findings. For the medialmeniscus, the accuracy of the MRI was 9 3% and 87% for the lateral. As main conclusions,the sensibility was 90% for the medial meniscus and 75% for the lateral one and about specificity,we found a result of 100% for the medial meniscus and 9 1% for the lateral. The negative andpositive predictive values were respectively 85% and 100% for the medial and 8 4% and 75%for the lateral. We noted more diagnostic difficulties in the anterior portion of lateral meniscusand lack of precission in the determination of the type and extension of the meniscal injury.