1. A method to facilitate providing calibration information for a given high energy-based scanner having a plurality of detectors, comprising: at a processor: 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; developing a corresponding observed trajectory for the calibration object in response to relative movement as between the plurality of causing a relative movement as between the plurality of detectors and a calibration object to develop a corresponding observed trajectory for the calibration object in response to the caused relative movement between the plurality of detectors and a calibration object.