48 Advances in multiplexed ion beam imaging (MIBI) for immune profiling of the tumor microenvironment by Yi Zhang, Jason Ptacek, Felipe Geyer, Andre Mignault, James Deeds, Jimmy Giedt, Jane Gu, Margaret McLaughlin, Yari Sigal, Jay Tarolli, Murat Aksoy, Monirath Hav, Rachel Finck, Jessica Finn