Dynamic Analysis Device for Chest Imaging Phase Synchronization
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Solution Overview
Problem
Dynamic images of the chest obtained at different times are difficult to compare accurately due to differences in respiratory cycles and phases, particularly affecting the interpretation of moving organs like the heart, which can lead to artifacts in temporal difference processes.
Innovation Solution
A dynamic analysis device and method that generates waveform information for respiratory and heartbeat states from chest dynamic images, selects a comparative image based on this information, and subjects the images to a comparison analysis process to synchronize and accurately compare dynamic images radiographed at different times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temporal difference process is performed on dynamic images taken at different times, then the difference between images can be recognized, but artifacts occur due to differences in respiratory cycles and phases
Solution Approach 1:
The patent applies preliminary action by performing respiratory phase synchronization and heartbeat cycle alignment before conducting the temporal difference process. The system extracts waveform information from dynamic images, identifies corresponding phases, and selects comparative images that match the reference image in both respiratory phase and heartbeat state, thereby preventing artifacts before they occur
Solution Approach 2:
The patent changes the parameter of image selection criteria from simple temporal sequencing to multi-parameter matching based on waveform analysis. By using respiratory phase angle and heartbeat cycle position as selection parameters, the system ensures that comparative images are selected only when these physiological parameters match, eliminating artifacts caused by phase mismatches
2Measurement precision
If only respiratory phase synchronization is performed, then lung image comparison is improved, but artifacts occur in heart region due to different heartbeat cycles
Solution Approach 1:
The patent segments the physiological cycle analysis into two independent components: respiratory phase analysis and heartbeat cycle analysis. By separately extracting waveform information for respiration and heartbeat, and independently synchronizing each, the system achieves precise matching for both lung and heart regions without interference between the two physiological processes
Solution Approach 2:
The patent performs preliminary heartbeat cycle synchronization in addition to respiratory phase synchronization before conducting the temporal difference process. By extracting heartbeat waveform information and aligning the cycles, the system prepares the heart region for accurate comparison, preventing artifacts that would otherwise occur due to different heartbeat phases
Data Source
AI summary
A dynamic analysis device including a hardware processor that generates, from each of a first chest dynamic image and a second chest dynamic image generated by radiographing dynamics of a chest at different times, a plurality of pieces of waveform information including at least waveform information indicating a respiratory state and waveform information indicating a heartbeat state; selects, from the second chest dynamic image, a comparative image to be compared with a reference image included in the first chest dynamic image, according to the generated plurality of pieces of waveform information; and subjects the reference image and the comparative image to a comparison analysis process.