Patellar Height Measured on Radiographs and <scp>MR</scp> Imaging and Its Relationship With Chondromalacia Patella

IS and MIS on both CR and MR images were reliable measures of patellar height and significantly correlated with CMP grade. In older patients, a lower MIS ratio was associated with a higher CMP grade. Although MRI tends to yield slightly higher IS and MIS values than CR, both modalities showed good agreement in measuring patellar height. These results suggest that reduced patellar height could be a relevant imaging finding in association with CMP severity.