Phase-Specific Normal Database for Coronary Artery Disease Detection

The patent segments the normal reference database into multiple phase-specific reference images (e.g., end-diastole, end-systole, and intermediate phases) rather than using a single averaged reference image. This segmentation allows each phase to be analyzed independently with appropriate phase-matched references, thereby improving measurement precision while maintaining ease of operation through automated phase detection and matching algorithms.

The patent introduces dynamic phase information into the reference database by capturing anatomical structures at multiple cardiac phases. The system dynamically selects and compares patient images against phase-appropriate normal references based on the detected cardiac phase, enabling time-resolved analysis that improves diagnostic accuracy without significantly increasing operational complexity.

The patent performs preliminary actions by pre-acquiring and storing normal reference images at multiple cardiac phases during separate scanning sessions. These phase-specific references are prepared in advance and organized in a structured database, allowing rapid retrieval and comparison during patient diagnostics without requiring complex real-time processing, thereby improving reliability while managing device complexity.

The patent creates copies of normal anatomical structures at different cardiac phases from healthy subjects and stores them as phase-specific reference images. These copied phase-specific references can be directly compared with patient images, improving diagnostic reliability by accounting for phase-related anatomical variations without requiring complex transformation algorithms during the diagnostic process.

The patent segments the cardiac cycle into distinct phases (e.g., end-diastole, end-systole, mid-contraction) and creates separate reference images for each phase. This segmentation prevents information loss by ensuring that each phase is represented appropriately, while the modular structure allows selective processing of only the relevant phase data, managing the quantity of data efficiently.

The patent implements partial action by acquiring and storing normal reference images at key cardiac phases rather than continuously throughout the entire cardiac cycle. This approach captures the essential phase-specific anatomical information needed for accurate diagnosis while avoiding the excessive data burden of continuous temporal sampling, thereby balancing information completeness with data management efficiency.