Gadobenate dimeglumine (Gd-DTPA) vs gadopentetate dimeglumine (Gd-BOPTA) for contrast-enhanced magnetic resonance angiography (MRA): improvement in intravascular signal intensity and contrast to noise ratio

Radiol Med. Jul-Aug 2003;106(1-2):87-93.
[Article in En, Italian]

Abstract

Purpose: The purpose of this study was to compare contrast enhanced MR angiography (MRA) with gadopentetate dimeglumine (Gd-DTPA) to MRA with gadobenate dimeglumine (Gd-BOPTA), a high relaxivity paramagnetic contrast agent.

Materials and methods: Twelve patients referred for carotid artery stenosis were examined with MR angiography using a fast spoiled gradient echo sequence. Gd-DTPA and Gd-BOPTA enhanced MR angiography were performed within 48-72 hours using a dose of 0.1 mmol/kg for Gd-BOPTA and 0.2 mmol/kg for Gd-DTPA, at a flow rate of 2 ml/s. Images were evaluated by two blinded radiologists. Qualitative and quantitative evaluations were performed comparing the sets of images from the two examinations.

Results: Qualitative evaluation demonstrated superior arterial contrast enhancement and vessel conspicuity with Gd-BOPTA compared with Gd-DTPA. Quantita-tive evaluation showed an improvement in both signal intensity and contrast to noise ratio with Gd-BOPTA.

Conclusion: The greater relaxivity of Gd-BOPTA, at lower doses, compared with Gd-DTPA, provides higher intravascular signal and signal to noise ratio. Gd-BOPTA appears to be an optimal contrast agent for contrast enhanced MRA.

Publication types

  • Comparative Study

MeSH terms

  • Carotid Stenosis / diagnosis*
  • Contrast Media*
  • Gadolinium DTPA*
  • Humans
  • Magnetic Resonance Angiography*
  • Meglumine* / analogs & derivatives*
  • Organometallic Compounds*
  • Statistics, Nonparametric

Substances

  • Contrast Media
  • Organometallic Compounds
  • gadobenic acid
  • Meglumine
  • Gadolinium DTPA