Review of imaging modalities and radiological findings of calvarial lesions

Figure 12  Calvarial osteomyelitis in sixty-nine years old female who underwent surgery for a subdural hematoma. A: Axial computed tomography of the bone window shows a defect in the right frontoparietal bone secondary to the previous surgery and the outer calvarial table (thin arrow) is intact; B: Axial computed tomography of the bone window six months later shows irregularity and thinning of the outer table (thin arrow) at the surgical site; C: Axial T2-weighted image shows hyperintensity (thin arrow) in the frontoparietal bone; D: On coronal contrast enhanced T1-weighted image, irregularities in the frontoparietal cortical surfaces and heterogeneous contrast enhancement in the bone (thin arrow) and contrast enhancement in the adjacent dura (thick arrow).