title: Phase-contrast cine MRI versus MR cisternography on the evaluation of the communication between intraventricular arachnoid cysts and neighbouring cerebrospinal fluid spaces.
abstract: BACKGROUND
  The objective of this study was to evaluate the role of phase-contrast cine magnetic resonance imaging (PC-MRI) in detecting possible communications between intraventricular arachnoid cysts (IV-ACs) and cerebrospinal fluid (CSF) spaces based on MR cisternography (MRC) comparison.
  
  
  METHODS
  Twenty-one patients with IV-AC were examined by PC-MRI and MRC. In order to determine the communication of IVAC with its neighbouring CSF spaces, PC-MRI was employed. The communication of IV-ACs with the ventricular system was examined on at least two anatomic planes. Precontrast images and PC-MRI were followed by the intrathecal administration of 0.5-1 ml gadopentetate dimeglumine. Early and delayed MRC were then carried out. Results of PC-MRI were compared with findings of MRC (McNemar's test).
  
  
  RESULTS
  In seven IV-ACs, no communication was detected by PC-MRI. In 14 IVACs, a pulsatile CSF flow into the IV-ACs was observed. All the IV-ACs, which have been determined as non-communicating (NC) on the PC-MRI, showed NC character on MRC as well. Six cases suggesting a communication on PC-MRI showed no communication on MRC. MRC revealed eight communicating (38%) and 13 NC (62%) IV-ACs among a total of 21 cases. The sensitivity and specificity of PC-MRI imaging in demonstrating the communication between the IV-ACs and the CSF were 100% and 54%, respectively.
  
  
  CONCLUSIONS
  PC-MRI is an effective method for evaluating NC IV-ACs. In order to decide about the management of IV-ACs, which are communicating according to the PC-MRI, the results should be confirmed with MRC if suspected jet flow is depicted.
authors.affiliation: Department of Radiology, Uludag University School of Medicine, Bursa, Turkey.
authors.forename: Oktay
authors.initials: O
authors.lastname: Algin
authors.forename: Bahattin
authors.initials: B
authors.lastname: Hakyemez
authors.forename: Gokhan
authors.initials: G
authors.lastname: Gokalp
authors.forename: Ender
authors.initials: E
authors.lastname: Korfali
authors.forename: Mufit
authors.initials: M
authors.lastname: Parlak
mesh_terms: D000293:Adolescent; D000328:Adult; D016080:Arachnoid Cysts / Q000175:diagnosis*; D002552:Cerebral Ventricles / Q000473:pathology*; D002555:Cerebrospinal Fluid / Q000166:cytology*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D019028:Magnetic Resonance Imaging, Cine / Q000379:methods*; D008297:Male; D009192:Myelography; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013116:Spinal Cord / Q000473:pathology*; D055815:Young Adult