Relative volume measured with magnetic resonance imaging is an articular collapse predictor in hematological pediatric patients with femoral head osteonecrosis

Figure 1 Assessment of relative volume and relative surface. The measurements were performed on a dedicated workstation on the T1-weighted images, both for RV (A) and RS (B) for each slice of the series. The corresponding STIR images (C) were reviewed in order to better evaluate the extent of the necrotic process. RV: Relative volume; RS: Relative surface; STIR: Short time inversion recovery.