Polymeric gastrointestinal MR contrast agents.

  title={Polymeric gastrointestinal MR contrast agents.},
  author={C P Tilcock and Evan C. Unger and Q F Ahkong and Tammi Fritz and Seymour H. Koenig and Rodney D. Brown},
  journal={Journal of magnetic resonance imaging : JMRI},
  volume={1 4},
Combining either paramagnetic (gadolinium chelates) or superparamagnetic (ferrite) contrast agents with polymers such as polyethylene glycol or cellulose, or with simple sugars such as dextrose, results in mixtures that exhibit improved T1 and/or T2 relaxivity compared with that of the contrast agent alone. It is suggested that the addition of such inexpensive and nontoxic polymers or saccharides may improve the effectiveness and decrease the cost of enteric contrast agents.