1. A method to facilitate providing calibration information for a given high energy-based scanner having a plurality of detectors, comprising: forming detector-level calibration information for the given high energy-based scanner by: calculating a theoretical trajectory as pertains to relative movement as between the plurality of detectors and a calibration object as a function of known geometry parameters for the given high energy-based scanner; causing relative movement as between the plurality of detectors and a calibration object to develop a corresponding observed trajectory for the calibration object; determining, for each of at least some of the plurality of detectors, a value that corresponds to a difference between the theoretical trajectory and the observed trajectory to thereby provide the detector-level calibration information.