Image of the Month

Vasospasm is a common cause of death and disability in patients with aneurysmal subarachnoid hemorrhage who survive the initial aneurysm rupture. Noninvasive perfusion CT can be used to assess these patients for possible vasospasm but classically requires the presence of a neuroradiologist for processing and interpretation, which can slow patient management. To see how a simple visual grading system could be used remotely by neurologists and neuroradiologists to evaluate patients for vasospasm, see Image of the Month,page 8.