9[9]Magarelli N,Scarabino T,Simeone AL,et al.Carotid stenosis:a comparision between MR and spinal CT angiography[J].Neuroradiology,1998,40 (6):367-373.
10[11]Farres MT,Grabenwoger F,Magometschning H,et al.SpiralCT angiography:study of stenoses and calcification at the origin of the vertebral artery[J].Neuroradiology,1996,38 (8):738-743.
