title: Display with 64-detector MDCT angiography of cerebral vascular variations.
abstract: OBJECTIVE
  The aim of this study was to assess the cerebral variations and observe their frequency in the patients who have undergone angiographies with the state of the art 64-slice multidetector computed tomography (MDCT) angiography technique due to various reasons.
  
  
  METHODS
  500 patients (253 women, 247 men) who had CT scan in the period of April 2008 to March 2010 at Dicle University Medicine Faculty Hospital Radiology Unit were surveyed in this study. Patients who had CT scan with brain CT angio protocol were evaluated using multiplanar, maximum intensity projection (MIP) and volume rendering (VR) images in work station.
  
  
  RESULTS
  773 variations were totally detected among 500 patients. Variations were categorized as Willis polygon, fenestration and other variations. Frequent variations were detected at Willis polygon and posterior communicating artery (PCOA) hypoplasia was detected as the prevalent variation.
  
  
  CONCLUSIONS
  In the present study, we have demonstrated that cerebral vascular variations are frequent and that these variations can be detected in a non-invasive manner using the MDCT angiography. The results obtained from our study may serve as preoperative guidelines for the units performing surgical procedures.
authors: Department of Radiology, Medical School, Dicle University, Yenişehir, Diyarbakır, 21280, Turkey, cihad5@hotmail.com.
authors: Cihad
authors: C
authors: Hamidi
authors: Yaşar
authors: Y
authors: Bükte
authors: Salih
authors: S
authors: Hattapoğlu
authors: Faysal
authors: F
authors: Ekici
authors: Güven
authors: G
authors: Tekbaş
authors: Hakan
authors: H
authors: Önder
authors: Hatice
authors: H
authors: Gümüş
authors: Aslan
authors: A
authors: Bilici
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001158:Arteries / Q000033:anatomy & histology*; D002533:Cerebral Angiography; D002560:Cerebrovascular Circulation; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D061330:Multidetector Computed Tomography; D055815:Young Adult