09/22/2025
The Femoral Head Edema Zone: A Novel Classification Scheme to Better Predict Osteonecrosis Progression.
This study proposed a new classification, the Edema Zone classification, that uses Magnetic Resonance Imaging (MRI) images to grade the extent of edema in osteonecrosis of the femoral head (ONFH). The purpose of the study was 1) to examine how the Edema Zone classification compared to the Japanese I...