Neuroimaging analysis
Neuroradiological parameters were processed centrally and blinded to functional outcome on the basis of CT or MRI scans on admission and after neurosurgery using To simplify the measurement of the hemicraniectomy diameter on postoperative imaging data, the bone flap was considered as an ellipse oriented in sagittal axis (see Fig. Non-contrast computed tomography CT scan in representative slices after alignment (rotation angles ϕAll patients were dichotomized in two groups based on the diameter of the bone flap according to the larger major axis defining diameter ≤ 14 cm as “standard hemicraniectomy” (HC ≤ 14) and > 14 cm as “large hemicraniectomy” (HC > 14) [