title: Unenhanced respiratory-gated magnetic resonance angiography (MRA) of renal artery in hypertensive patients using true fast imaging with steady-state precession technique compared with contrast-enhanced MRA.
abstract: OBJECTIVE
  This study was aimed to evaluate the accuracy of "True Fast Imaging with Steady-State Precession" (TrueFISP) MR angiography (MRA) for diagnosis of renal arterial stenosis (RAS) in hypertensive patients.
  
  
  METHODS
  Twenty-two patients underwent both TrueFISP MRA and contrast-enhanced MRA (CE-MRA) on a 1.5-T MR imager. Volume of main renal arteries, length of maximal visible renal arteries, number of visualized branches, stenotic grade, and subjective quality were compared. Paired 2-tailed Student t test and Wilcoxon signed rank test were applied to evaluate the significance of these variables.
  
  
  RESULTS
  Volume of main renal arteries, length of maximal visible renal arteries, and number of branches indicated no significant difference between the 2 techniques (P > 0.05). Stenotic degree of 10 RAS was greater on CE-MRA than on TrueFISP MRA. Qualitative scores from TrueFISP MRA were higher than those from CE-MRA (P < 0.05).
  
  
  CONCLUSIONS
  TrueFISP MRA is a reliable and accurate method for evaluating RAS.
authors.affiliation: From the *Department of Radiology, Zhongshan Hospital, Fudan University, Shanghai, China; and †Department of Radiology, First Affiliated Hospital of Dalian Medical University, Dalian, China.
authors.forename: Weisheng
authors.initials: W
authors.lastname: Zhang
authors.forename: Jiang
authors.initials: J
authors.lastname: Lin
authors.forename: Shaowu
authors.initials: S
authors.lastname: Wang
authors.forename: Peng
authors.initials: P
authors.lastname: Lv
authors.forename: Lili
authors.initials: L
authors.lastname: Wang
authors.forename: Hao
authors.initials: H
authors.lastname: Liu
authors.forename: Caizhong
authors.initials: C
authors.lastname: Chen
authors.forename: Mengsu
authors.initials: M
authors.lastname: Zeng
mesh_terms: D000328:Adult; D000368:Aged; D003287:Contrast Media; D005260:Female; D019786:Gadolinium DTPA; D006801:Humans; D006977:Hypertension, Renal / Q000209:etiology / Q000473:pathology*; D007089:Image Enhancement / Q000379:methods*; D018810:Magnetic Resonance Angiography / Q000379:methods*; D008297:Male; D008875:Middle Aged; D012077:Renal Artery / Q000473:pathology*; D012078:Renal Artery Obstruction / Q000150:complications / Q000473:pathology*; D015203:Reproducibility of Results; D055425:Respiratory-Gated Imaging Techniques / Q000379:methods*; D012680:Sensitivity and Specificity; D055815:Young Adult
chemical_list: D003287:Contrast Media; D019786:Gadolinium DTPA