Systems and methods that involve integrating imaging data from multiple sources to create a single, accurate model of a patient's anatomy. One method includes receiving a representation of a target object for modeling； determining one or more first anatomical parameters of the target anatomical object from at least one of one or more first images of the target anatomical object； determining one or more second anatomical parameters of the target anatomical object from at least one of one or more second images of the target anatomical object； updating the one or more first anatomical parameters based at least on the one or more second anatomical parameters； and generating a model of the target anatomical object based on the updated first anatomical parameters.
