Hale says L2 and American College of Radiology concludes that it is safe for mother-infant dyad to continue breastfeeding after the administration of a gadolinium-containing contrast medium.  One study that he sites says "that the very small an]mount of gadopentrate dimeglumine transferred to the nursing infant does not warrant the potentially traumatic 24 hour suspension of breastfeeding for lactating women..."   
 
I also looked in Lactmed (NIH) and the first ref said that the infant receives less than 1% of a dose that would be actually used on that infant, if the infant was having the study.
 
I guess if mom is still apprehensive, she could call the infant Risk Center.  I'd say no worries, I trust 2012 Hale  Pat in SNJ

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