Time-of-flight MR angiography of carotid aretery stenosis: does a flow void represent severe stenosis?
Nederkoorn, P.J., van der Graaf, Y., Eikelboom, B.C., van der Lugt, A., Bartels, L.W., Mali, W.P.T.M.
American Journal of Neuroradiology 23 p. 1779-1784