title: Magnetic resonance angiography with elliptical ordering and fluoroscopic triggering of the renal arteries.
abstract: OBJECTIVE
  To evaluate centric ordered MR angiography with fluoroscopic triggering of renal artery disease.
  
  
  METHODS
  21 patients underwent MR-Angiography with a fluoroscopically triggered centric ordered sequence. The fluoroscopic trigger was obtained with the parameters that follow: TR/TE/TI: 1000/1.7/500 ms; NEX 1; MTX 141 x 256; SL 10mm; AT 0.83 s. The angiographic sequence was obtained with a CareBolus sequence (TR/TE: 3.9/1.5 ms; NEX 1; MTX 176 x 512; SL 1.1 mm; AT ~20s) after the intra-venous injection of 18 ml of Gd-BOPTA 0.5M followed by saline solution at a rate of 2.5 ml.s-1. Contrast-to-noise ratio (CNR) was obtained at the origin of the renal arteries. Statistical analysis was performed considering image quality, contrast media dose and the CNR.
  
  
  RESULTS
  Ringing artifacts never occurred. The collaboration of the patient and the use of the earphones are critical to avoid motion artifacts. Renal veins have never been visualized. High CNR were noticed.
  
  
  CONCLUSIONS
  This technique allows a more efficient use of the contrast media. MRA with centric ordering and fluoroscopic triggering allows an optimal and easy assessment of the renal arteries.
authors.affiliation: Istituto di Radiologia, Università degli Studi di Parma, Parma, Italy. g.luccichenti@libero.it
authors.forename: Giacomo
authors.initials: G
authors.lastname: Luccichenti
authors.forename: Filippo
authors.initials: F
authors.lastname: Cademartiri
authors.forename: Ugo
authors.initials: U
authors.lastname: Ugolotti
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Marchesi
authors.forename: Paolo
authors.initials: P
authors.lastname: Pavone
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003287:Contrast Media / Q000008:administration & dosage; D005471:Fluoroscopy; D006801:Humans; D007275:Injections, Intravenous; D018810:Magnetic Resonance Angiography / Q000379:methods*; D008536:Meglumine / Q000008:administration & dosage / Q000031:analogs & derivatives*; D008875:Middle Aged; D009942:Organometallic Compounds / Q000008:administration & dosage; D011446:Prospective Studies; D012077:Renal Artery / Q000473:pathology; D012078:Renal Artery Obstruction / Q000175:diagnosis*
chemical_list: D003287:Contrast Media; D009942:Organometallic Compounds; C064572:gadobenic acid; D008536:Meglumine