1. A method for determining optimal treatment information for a patient, comprising: receiving treatment plan information for a patient, the treatment plan information including gated image data of the patient for a plurality of phases with one or more defined target regions and treatment plan dose distribution associated with the one or more target regions; processing the treatment plan information to determine a deformation parameter, the deformation parameter representing a movement of each region due to respiration at different phases; determining a dose distribution for the one or more target regions by applying the deformation parameter to the treatment plan dose distribution for a subset of the plurality of phases; determining one or more dose parameters based on the dose distribution for the subset of the plurality of phases, the one or more dose parameters representing a motion of the dose distribution over the plurality of phases for each region; and determining optimal treatment information for the patient based on the one or more dose parameters, the optimal treatment information including an optimal treatment phase and associated dose distribution for each region during the optimal treatment phase, the optimal treatment phase being a phase of the plurality of phases having a minimum total dose for the one or more target regions.