A Monte Carlo‐based analytic model of neutron dose equivalent for a mevion gantry‐mounted passively scattered proton system for craniospinal irradiation. - Baradaran‐Ghahfarokhi, Milad; Reynoso, Francisco; Sun, Baozhou; Darafsheh, Arash; Prusator, Michael T.; Mutic, Sasa; Zhao, Tianyu (Medical Physics, 2020)