Researchers are encouraged to submit papers for presentation at the Third Meeting of X-Ray and Neutron Phase Imaging with Gratings (XNPIG 2015). Hosted by the National Institutes of Health and SPIE, the interdisciplinary conference will cover areas including x-ray/neutron optics for phase imaging with grating(s); applications for medical diagnoses and nondestructive investigations; fabrication of x-ray/neutron gratings; image processing for phase imaging; and related science and technology. If accepted, the 100-word, text-only short abstract will be published in the online or printed programs promoting the conference.