2:45 PM. 31. Photoacoustic Tracking of Nanoengineered NK Cells Using PLGA Nanoparticles in Combination with Radiotherapy.Brendan Barlow1, Tasneem Mukarrama2, Megan Purl2, Ana Sandoval-Castellanos, PhD2, Alexander LeBeau2, Arta Monjazeb, M.D., Ph.D.3, Sean Judge, M.D.2, Robert Canter, M.D.2, Jinhwan Kim, Ph.D.4 1University of California Davis, 2UC Davis, 3UC Davis Health, 4UC Davis Health, University of California, Davis