title: CT perfusion imaging pitfall related to fetal posterior cerebral artery.
abstract: OBJECTIVE
  The purpose of this article is to discuss how a unilateral fetal posterior cerebral artery (PCA) causes perfusion map asymmetry due to anteroposterior bolus arrival discrepancy. We performed region of interest analysis of asymmetric perfusion maps before and after delay correction was performed.
  
  
  CONCLUSIONS
  Perfusion asymmetry becomes unapparent using a delay correction algorithm, indicating bolus arrival delay on the side opposite the fetal PCA. Delay correction algorithms can eliminate deconvolution errors related to bolus arrival delay.
authors.affiliation: Department of Radiology, West Virginia University. Box 9235 HSC, Morgantown, WV 26506, USA. drkramrd@yahoo.com
authors.forename: Karthikram
authors.initials: K
authors.lastname: Raghuram
authors.forename: Bob L
authors.initials: BL
authors.lastname: Hou
authors.forename: Thomas D
authors.initials: TD
authors.lastname: Roberts
authors.forename: Jeffrey S
authors.initials: JS
authors.lastname: Carpenter
mesh_terms: D000369:Aged, 80 and over; D000465:Algorithms; D001921:Brain / Q000098:blood supply*; D002560:Cerebrovascular Circulation; D003287:Contrast Media / Q000493:pharmacokinetics; D003951:Diagnostic Errors; D005260:Female; D006801:Humans; D008297:Male; D020769:Posterior Cerebral Artery / Q000000981:diagnostic imaging*; D020521:Stroke / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014283:Triiodobenzoic Acids / Q000493:pharmacokinetics
chemical_list: D003287:Contrast Media; D014283:Triiodobenzoic Acids; C054871:ioversol