S18-147 Ultra Bright Lanthanide-Doped Nanoparticles for Luminescence Imaging Stanford researchers have developed a lanthanide-doped upconverting nanoparticle (UCNP) that emits very photostable and non-blinking light, and is bright enough to delineate tumor boundaries to the naked eye during surgery. Steven Chu Qian Liu Yunxiang Zhang Chunte Peng