X-Ray Patient Rotation Positioning Using Landmark Ratio Feedback

The patent merges the rule-based approach (which provides transparency through segmented structures) with the end-to-end approach (which provides quantitative rotation angle measurement) into a hybrid system. The system first segments anatomical structures using rule-based methods to maintain transparency, then uses the segmented landmarks to calculate quantitative rotation angles, thus achieving both transparency and measurement precision simultaneously.

The patent segments the end-to-end approach by breaking it down into intermediate steps: identifying anatomical landmarks, calculating distances between landmarks, determining ratios, and finally computing rotation angles. This segmentation allows the system to maintain quantitative precision while providing transparency by showing users the intermediate measurements and calculations that lead to the final rotation angle.

The patent implements a feedback mechanism that provides real-time quantitative rotation angle measurements and transparency information to the technologist during patient positioning. This feedback loop allows the technologist to adjust patient position based on objective numerical data and visual feedback, ensuring diagnostic accuracy while maintaining workflow efficiency by avoiding the need for repeated examinations.

The patent implements a self-service system where the automated positioning assessment tool independently performs landmark identification, distance calculation, ratio determination, and rotation angle computation without requiring manual intervention. The system automatically generates quantitative feedback and transparency information, reducing clinical workload while maintaining manageable system complexity through modular architecture.