Photon Counting Coincidence Detection Digital Analysis

The patent replaces complex analog charge sharing detection circuitry with a digital coincidence detection system. Instead of using analog circuits to track and measure charge distribution across pixels, the invention uses digital logic circuits that compare binary coincidence signals from multiple pixels. This substitution of analog measurement with digital coincidence logic reduces circuit complexity while maintaining measurement precision for photon energy detection.

The patent replaces area-intensive analog charge sharing detection circuits with compact digital coincidence detection logic. The digital approach uses binary signal comparison between neighboring pixels rather than continuous analog measurements, significantly reducing the circuit area required while maintaining the ability to detect and correct for charge sharing effects in photon energy measurement.

The patent implements multiple energy thresholds (first threshold and second threshold) in the coincidence detection circuit to enable differentiation of multiple contrast media. By varying the threshold parameters and comparing coincidence signals at different threshold levels, the system can identify and measure multiple types of contrast agents simultaneously. This parameter-based approach provides adaptability for multi-contrast imaging while using relatively simple digital logic circuits rather than complex analog spectral analysis.