
Keywords: NPV، ارزش پیش بینی منفی; Artificial neural network; Cerebral aneurysm; Mathematic modeling; Subarachnoid hemorrhage; VasospasmANN, Artifical neural network; NPV, Negative predictive value; PPV, Positive predictive value; SCV, Symptomatic cerebral vasospasm; TCD, Transcranial Dopp