Affiliation: | (1) Neuroradiology, Department of Medical Radiology, University Hospital, Basel, Petersgraben 4, 4031 Basel, Switzerland e-mail: ekirsch@uhbs.ch, Tel.: 00 41/61/2 65 25 25, Fax: 00 41/61/2 65 49 08, CH;(2) Department of Neuroradiology, Royal Perth Hospital, G. P. O. Box X22213, Perth 6001, Western Australia, AU;(3) Department of Neurosurgery, Royal Perth Hospital, G. P. O. Box X22213, Perth 6001, Western Australia, AU |