RT Journal Article SR Electronic T1 Multidetector Helical CT Angiography: Poor Cousin or Contender? JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 731 OP 731 VO 20 IS 5 A1 Barton Lane YR 1999 UL http://www.ajnr.org/content/20/5/731.abstract AB