Abstract
Purpose: Our objective was to evaluate the use of a new medium weight MRI contrast agent, NMS60 (a␣synthetic oligomeric Gd-complex containing three Gd3+ atoms, molecular weight 2158 Da) compared to gadolinium-diethylene triamine pentaacetic acid (Gd-DTPA) in a pig myocardial ischemia model. Materials: We used 13 male white hybrid pigs. Animals were scanned in the acute phase 2–3 h after the onset of myocardial ischemia. Scans were acquired on a 1.5T GE Signa with dynamic T1-weighted imaging during a bolus injection of 0.1 mmol(gd)/kg of either NMS60 or Gd-DTPA, 2D CINE at 5 min after injection, and T1-weighted spin-echo imaging up to 60 min. Results: The postcontrast CINE scans showed improved contrast-to-noise ratio after NMS60 injection, compared to Gd-DTPA. There was significantly greater enhancement with NMS60 in both normal myocardium and in the ischemic lesion on T1-weighted spin-echo scans up to 60 min after injection. The dose ranging study shows a 24% greater enhancement with NMS60 compared to Gd-DTPA. Discussion: This new medium weighted contrast agent offers improved enhancement for cardiac MRI, compared to Gd-DTPA, with similar washout kinetics and lower toxicity, and may prove useful for better detection of myocardial ischemia as well as delayed or hyperenhancement after reperfusion.
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D’Arceuil, H.E., de Crespigny, A.J., Pelc, L. et al. A Comparison of CH3-DTPA-GD (NMS60) and GD-DTPA for Evaluation of Acute Myocardial Ischemia. Int J Cardiovasc Imaging 21, 539–547 (2005). https://doi.org/10.1007/s10554-005-2103-4
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DOI: https://doi.org/10.1007/s10554-005-2103-4