title: Assessment of angiographic vascularity of meningiomas with dynamic susceptibility contrast-enhanced perfusion-weighted imaging and diffusion tensor imaging.
abstract: OBJECTIVE
  The roles of DTI and dynamic susceptibility contrast-enhanced-PWI in predicting the angiographic vascularity of meningiomas have not been studied. We aimed to investigate if these 2 techniques could reflect the angiographic vascularity of meningiomas.
  
  
  METHODS
  Thirty-two consecutive patients with meningiomas who had preoperative dynamic susceptibility contrast-enhanced-PWI, DTI, and conventional angiography were retrospectively included. The correlations between angiographic vascularity of meningiomas, classified with a 4-point grading scale, and the clinical or imaging variables-age and sex of patient, as well as size, CBV, fractional anisotropy, and ADC of meningiomas-were analyzed. The meningiomas were dichotomized into high-vascularity and low-vascularity groups. The differences in clinical and imaging variables between the 2 groups were compared. Receiver operating characteristic curve analysis was used to determine the diagnostic performance of these variables.
  
  
  RESULTS
  In meningiomas, angiographic vascularity correlated positively with CBV but negatively with fractional anisotropy. High-vascularity meningiomas demonstrated significantly higher CBV but lower fractional anisotropy as compared with low-vascularity meningiomas. In differentiating between the 2 groups, the area under the curve values were 0.991 for CBV and 0.934 for fractional anisotropy on receiver operating characteristic curve analysis.
  
  
  CONCLUSIONS
  CBV and fractional anisotropy correlate well with angiographic vascularity of meningiomas. They may differentiate between low-vascularity and high-vascularity meningiomas.
authors.affiliation: From the Departments of Medical Imaging and Intervention (C.H.T, Y.-W.P., S.-H.N, H.-F.W.).
authors.forename: C H
authors.initials: CH
authors.lastname: Toh
authors.forename: K-C
authors.initials: KC
authors.lastname: Wei
authors.forename: C N
authors.initials: CN
authors.lastname: Chang
authors.forename: Y-W
authors.initials: YW
authors.lastname: Peng
authors.forename: S-H
authors.initials: SH
authors.lastname: Ng
authors.forename: H-F
authors.initials: HF
authors.lastname: Wong
authors.forename: C-P
authors.initials: CP
authors.lastname: Lin
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003287:Contrast Media; D056324:Diffusion Tensor Imaging / Q000379:methods*; D005260:Female; D006801:Humans; D018810:Magnetic Resonance Angiography / Q000379:methods*; D008297:Male; D008577:Meningeal Neoplasms / Q000175:diagnosis / Q000503:physiopathology*; D008579:Meningioma / Q000175:diagnosis / Q000503:physiopathology*; D008875:Middle Aged; D009389:Neovascularization, Pathologic / Q000175:diagnosis / Q000503:physiopathology*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D055815:Young Adult
chemical_list: D003287:Contrast Media