1. A method for imaging a desired structure in a subject with a magnetic resonance imaging (MRI) system, the steps comprising: a) acquiring an image with the MRI system during a first session that depicts the desired structure; b) segmenting the acquired image to identify a position and boundary of the desired structure; c) prescribing a pulse sequence using data produced in step b); and d) acquiring an image of the desired structure using the MRI system and the pulse sequence prescribed in step c).