title: Limitations of color Doppler sonography in the imaging of ocular vessels.
abstract: OBJECTIVE
  To describe a case where detection of blood flow in the central retinal artery and the central retinal vein was limited by an artifact evoked by the optic disc drusen. METHODS Case report.
  
  
  RESULTS
  During color Doppler sonography, examination of optic disc drusen may generate an artifact--the so-called twinkling artifact--which can simulate blood flow and make evaluation of the central retinal vessels impossible.
  
  
  CONCLUSIONS
  Twinkling artifact does not allow evaluation of color Doppler sonography in the imaging of ocular vessels.
authors.affiliation: Department of Radiology Bialystok Medical Academy, Bialystok - Poland. ambau@yahoo.com
authors.forename: A
authors.initials: A
authors.lastname: Ustymowicz
authors.forename: I
authors.initials: I
authors.lastname: Obuchowska
authors.forename: J
authors.initials: J
authors.lastname: Krejza
authors.forename: Z
authors.initials: Z
authors.lastname: Mariak
mesh_terms: D016477:Artifacts; D001783:Blood Flow Velocity; D006801:Humans; D008297:Male; D008875:Middle Aged; D015594:Optic Disk Drusen / Q000503:physiopathology*; D012039:Regional Blood Flow; D012161:Retinal Artery / Q000000981:diagnostic imaging* / Q000502:physiology*; D012169:Retinal Vein / Q000000981:diagnostic imaging* / Q000502:physiology*; D018615:Ultrasonography, Doppler, Color