Denoising of ultra-low-dose 15O positron emission tomography images using deep image prior with anatomical information extracted through magnetic resonance segmentation. - Matsubara K; Ibaraki M; Hashimoto F; Onishi Y; Shinohara Y; Sato K; Yamamoto H; Kinoshita T (Physica medica : PM : an international journal devoted to the applications of physics to medicine and biology : official journal of the Italian Association of Biomedical Physics (AIFB), 2026)