Quantifying capillary transit time distribution: a novel tracer kinetic model accounting for leakiness, back diffusion, and perfusion in MRI and PET imaging—the outflow model. - Larsson, Henrik B. W.; Cramer, Stig P.; Tireli, Edis D.; Larsson, Tanne S. W.; Lindberg, Ulrich; Vestergaard, Mark B. (EJNMMI Physics, 2026)