Comparison of low-dose higher-relaxivity and standard-dose lower-relaxivity contrast media for delayed-enhancement mri: A blinded randomized crossover study

Benjamin Y.C. Cheong, Cihan Duran, Ourania A. Preventza, Raja Muthupillai

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

OBJECTIVE. The gadolinium-based MRI contrast agent gadobenate dimeglumine has nearly twice the MR relaxivity of gadopentetate dimeglumine at 1.5 T. The purpose of this study was to determine whether a lower dose (0.1 mmol/kg) of gadobenate dimeglumine can be used to obtain delayed-enhancement MR images comparable to those obtained with a standard dose (0.2 mmol/kg) of gadopentetate dimeglumine. SUBJECTS AND METHODS. In this blinded randomized crossover study, 20 patients with known myocardial infarction underwent two separate delayed-enhancement MRI examinations after receiving 0.1 mmol/kg gadobenate dimeglumine and 0.2 mmol/kg gadopentetate dimeglumine (random administration). The conspicuity of lesion enhancement 5, 10, and 20 minutes after contrast administration was quantified as relative enhancement ratio (RER). RESULTS. With either gadolinium-based contrast agent, damaged myocardium had higher signal intensity than normal remote myocardium (RER > 4) on delayed-enhancement MR images, and the blood RER declined over time after contrast administration. The blood RER was not significantly higher for gadobenate dimeglumine than for gadopentetate dimeglumine at 5 and 10 minutes. Nevertheless, there was a larger reduction in blood RER for gadobenate dimeglumine than for gadopentetate dimeglumine between 5 and 10 minutes and between 10 and 20 minutes. The volumes of enhancement were similar for gadobenate dimeglumine (13.6 ± 8.8 cm3) and gadopentetate dimeglumine (13.5 ± 8.9 cm3) (p = 0.98). The mean difference in Bland-Altman analysis for delayed-enhancement volume between the agents was 0.1 cm3. CONCLUSION. Qualitatively and quantitatively, delayed-enhancement MR images of ischemic myocardium obtained with 0.1 mmol/kg gadobenate dimeglumine are comparable to those obtained with 0.2 mmol/kg gadopentetate dimeglumine 5, 10, and 20 minutes after contrast administration.

Original languageEnglish (US)
Pages (from-to)533-539
Number of pages7
JournalAmerican Journal of Roentgenology
Volume205
Issue number3
DOIs
StatePublished - Sep 1 2015
Externally publishedYes

Keywords

  • Cardiovascular MRI
  • Crossover studies
  • Delayed enhancement
  • Gadobenate dimeglumine
  • Gadolinium-based contrast agents
  • Gadopentetate dimeglumine
  • Myocardial scar
  • Randomized controlled trial

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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