title: Time-resolved 3D contrast-enhanced MRA on 3.0T: a non-invasive follow-up technique after stent-assisted coil embolization of the intracranial aneurysm.
abstract: OBJECTIVE
  To evaluate the usefulness of time-resolved contrast enhanced magnetic resonance angiography (4D MRA) after stent-assisted coil embolization by comparing it with time of flight (TOF)-MRA.
  
  
  METHODS
  TOF-MRA and 4D MRA were obtained by 3T MRI in 26 patients treated with stent-assisted coil embolization (Enterprise:Neuroform = 7:19). The qualities of the MRA were rated on a graded scale of 0 to 4. We classified completeness of endovascular treatment into three categories. The degree of quality of visualization of the stented artery was compared between TOF and 4D MRA by the Wilcoxon signed rank test. We used the Mann-Whitney U test for comparing the quality of the visualization of the stented artery according to the stent type in each MRA method.
  
  
  RESULTS
  The quality in terms of the visualization of the stented arteries in 4D MRA was significantly superior to that in 3D TOF-MRA, regardless of type of the stent (p < 0.001). The quality of the arteries which were stented with Neuroform was superior to that of the arteries stented with Enterprise in 3D TOF (p < 0.001) and 4D MRA (p = 0.008), respectively.
  
  
  CONCLUSIONS
  4D MRA provides a higher quality view of the stented parent arteries when compared with TOF.
authors: Department of Radiology, Konkuk University School of Medicine, Seoul 143-729, Korea.
authors: Jin Woo
authors: JW
authors: Choi
authors: Hong Gee
authors: HG
authors: Roh
authors: Won-Jin
authors: WJ
authors: Moon
authors: Na Ra
authors: NR
authors: Kim
authors: Sung Gyu
authors: SG
authors: Moon
authors: Chung Hwan
authors: CH
authors: Kang
authors: Young Il
authors: YI
authors: Chun
authors: Hyun-Seung
authors: HS
authors: Kang
mesh_terms: D000328:Adult; D000368:Aged; D002536:Cerebral Arteries / Q000473:pathology; D003287:Contrast Media; D004621:Embolization, Therapeutic; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional; D002532:Intracranial Aneurysm / Q000175:diagnosis* / Q000628:therapy; D018810:Magnetic Resonance Angiography / Q000379:methods; D008297:Male; D008875:Middle Aged; D012680:Sensitivity and Specificity; D015607:Stents; D055815:Young Adult
chemical_list: D003287:Contrast Media