1. A non-transitory computer-readable medium embodying a program of instructions executable by machine to perform steps for medical imaging planning, the steps comprising: (i) learning hierarchical detectors based on training image data; (ii) detecting reference anatomical primitives in first image data of a subject by applying the learned hierarchical detectors; (iii) deriving one or more imaging parameters based on a geometric model, wherein the geometric model defines a geometric relationship between at least one of the detected reference anatomical primitives and the one or more imaging parameters; and (iv) presenting, via a user interface, the one or more imaging parameters for use in acquisition, reconstruction or processing of second image data of the subject.