title: [Multiphasic MR angiography as an intra-individual comparison between the contrast agents Gd-DTPA, Gd-BOPTA, and Gd-BT-DO3A].
abstract: OBJECTIVE
  The availability of new MR contrast agents having either a protein binding effect or higher concentration leads to the question if they differ from standard compounds in their vascular contrasting properties.
  
  
  METHODS
  By intraindividual comparison five volunteers were examined (1.5 T MR system) with a multi-phasic MRA of the abdomen each receiving three different contrast agents (gadopentetate dimeglumine 0.5 M; gadobenate dimeglumine 0.5 M, and gadobutrol 1.0 M). The dose (0.15 mmol/kg body weight) and flow rate (3.0 ml/s) were kept identical. All images were quantitatively and qualitatively evaluated by blinded assessment.
  
  
  RESULTS
  Significantly higher maximum signal intensity was found in the arteries for the protein interacting gadobenate dimeglumine (p = 0.05). No significant difference in vascular enhancement was demonstrated in the comparison of gadobutrol to gadopentetate dimeglumine.
  
  
  CONCLUSIONS
  Gadobenate dimeglumine was shown to be a favorable contrast agent for multi-phasic MRA. A higher concentrated Gd-chelate does not automatically lead to improved vascular contrast if standard imaging protocols are used.
authors.affiliation: Department of Radiology, The Ohio State University, Columbus, Ohio 43210-1228, USA. von.tengg.1@osu.edu
authors.forename: H
authors.initials: H
authors.lastname: von Tengg-Kobligk
authors.forename: F
authors.initials: F
authors.lastname: Floemer
authors.forename: M V
authors.initials: MV
authors.lastname: Knopp
mesh_terms: D000005:Abdomen / Q000098:blood supply*; D000328:Adult; D001158:Arteries / Q000473:pathology; D003287:Contrast Media; D004311:Double-Blind Method; D005260:Female; D019786:Gadolinium DTPA; D006801:Humans; D007275:Injections, Intravenous; D018810:Magnetic Resonance Angiography / Q000379:methods*; D008297:Male; D008536:Meglumine / Q000031:analogs & derivatives*; D009942:Organometallic Compounds; D010865:Pilot Projects; D012016:Reference Values; D014680:Veins / Q000473:pathology
chemical_list: D003287:Contrast Media; D009942:Organometallic Compounds; C064572:gadobenic acid; C090600:gadobutrol; D008536:Meglumine; D019786:Gadolinium DTPA