In vitro longitudinal relaxivity profile of Gd (ABE-DTTA), an investigational magnetic resonance imaging contrast agent

Akos Varga-Szemes, Pal Kiss, Andras Rab, Pal Suranyi, Zsofia Lenkey, Tamas Simor, Robert G. Bryant, Gabriel A. Elgavish

Research output: Article

5 Citations (Scopus)

Abstract

Purpose: MRI contrast agents (CA) whose contrast enhancement remains relatively high even at the higher end of the magnetic field strength range would be desirable. The purpose of this work was to demonstrate such a desired magnetic field dependency of the longitudinal relaxivity for an experimental MRI CA, Gd(ABE-DTTA). Materials and Methods: The relaxivity of 0.5mM and 1mM Gd(ABE-DTTA) was measured by Nuclear Magnetic Relaxation Dispersion (NMRD) in the range of 0.0002 to 1T. Two MRI and five NMR instruments were used to cover the range between 1.5 to 20T. Parallel measurement of a Gd-DTPA sample was performed throughout as reference. All measurements were carried out at 37°C and pH 7.4. Results: The relaxivity values of 0.5mM and 1mM Gd(ABE-DTTA) measured at 1.5, 3, and 7T, within the presently clinically relevant magnetic field range, were 15.3, 11.8, 12.4 s-1mM-1 and 18.1, 16.7, and 13.5 s-1mM-1, respectively. The control 4 mM Gd-DTPA relaxivities at the same magnetic fields were 3.6, 3.3, and 3.0 s-1mM-1, respectively. Conclusions: The longitudinal relaxivity of Gd(ABE-DTTA) measured within the presently clinically relevant field range is three to five times higher than that of most commercially available agents. Thus, Gd(ABE-DTTA) could be a practical choice at any field strength currently used in clinical imaging including those at the higher end.

Original languageEnglish
Article numbere0149260
JournalPloS one
Volume11
Issue number2
DOIs
Publication statusPublished - febr. 2016

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)
  • General

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    Varga-Szemes, A., Kiss, P., Rab, A., Suranyi, P., Lenkey, Z., Simor, T., Bryant, R. G., & Elgavish, G. A. (2016). In vitro longitudinal relaxivity profile of Gd (ABE-DTTA), an investigational magnetic resonance imaging contrast agent. PloS one, 11(2), [e0149260]. https://doi.org/10.1371/journal.pone.0149260