Cardiac-Synchronized Angiographic Correction for Device Position Tracking
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Solution Overview
Problem
The positional deviation of medical devices on angiographic images due to patient movement, particularly heart pulsation and breathing, complicates procedures such as recanalization of chronic total occlusions, making it difficult for operators to accurately grasp the position and orientation of the medical device within the blood vessel.
Innovation Solution
A surgery assistance device that acquires angiographic images at intervals corresponding to the heart's pulsation cycle and corrects these images to align the position of a specific medical device portion with its previous position, reducing deviations caused by heart pulsation and other movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If continuous angiographic imaging is performed to track medical device position, then real-time visualization is improved, but positional deviation due to heart pulsation and breathing increases
Solution Approach 1:
The system performs image acquisition at periodic intervals synchronized with the heart pulsation cycle, specifically acquiring images at predetermined time points corresponding to the same phase of the cardiac cycle. This periodic sampling approach captures the medical device position at consistent physiological states, eliminating positional deviation caused by heart movement while maintaining real-time tracking capability
Solution Approach 2:
The system预先 acquires reference angiographic images at the same time intervals before the actual measurement process. These reference images serve as a stable baseline for comparison, allowing the system to compensate for positional deviations in real-time by referencing the pre-acquired stable anatomical structure positions
2Measurement precision
If image correction is applied to reduce positional deviation, then measurement precision is improved, but processing time and computational complexity increase
Solution Approach 1:
The image correction process is performed at predetermined time intervals corresponding to the heart pulsation cycle rather than continuously. By correcting images only at these periodic intervals when positional deviation is most pronounced, the system achieves effective deviation reduction while minimizing computational overhead and processing time
Solution Approach 2:
The system calculates positional deviation between sequentially acquired angiographic images and uses this feedback information to dynamically adjust the correction amount. The correction magnitude is proportional to the detected deviation, allowing the system to apply minimal processing when deviation is small and more intensive correction only when necessary, thus optimizing processing efficiency
Data Source
AI summary
A surgery assistance device includes a processor that sets a predetermined time interval corresponding to a pulsation cycle of a heart and sequentially acquires an angiographic image representing a target blood vessel into which a medical device is inserted at the predetermined time interval. The processor sequentially corrects the angiographic image sequentially acquired and generates a corrected angiographic image by correcting the angiographic image to be corrected in such a manner that a position of a specific portion of the medical device included in the angiographic image to be corrected approaches a position of the specific portion of the medical device included in the angiographic image acquired temporally earlier than the angiographic image to be corrected.