Pre-Operative Staging of Pancreatic Cancer Using Superparamagnetic Iron Oxide Magnetic Resonance Imaging (SPIO MRI)

* On the first day, study participants will undergo 2 MRI examinations. A scan will be done prior to administration of the contrast agent (Feraheme) and then a second scan immediately after administration. On the second day, study participants will be asked to return for a third MRI. * All MRI scans will be done at Massachusetts General Hospital.