SD-OCT Image Processor for Real-Time Cataract Laser Feedback
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Solution Overview
Problem
Current cataract surgical imaging systems are unable to provide timely and actionable feedback during procedures, leading to potential complications such as incomplete capsulotomies, posterior capsular punctures, and miscalibration, due to their inability to image and analyze the photo-disrupted regions quickly enough to modify the surgical process in real time.
Innovation Solution
The implementation of a cataract surgical system that includes a Spectral Domain Optical Coherence Tomographic (SD-OCT) imaging system capable of generating images and performing analysis at a rate of at least 5 frames per second, allowing for real-time modification of the surgical laser beam's scan pattern based on feedback from the OCT image processor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional imaging systems are used during cataract surgery, then the surgical procedure can be performed, but the imaging speed is insufficient to provide real-time feedback for modifying the surgical process
Solution Approach 1:
The patent implements a feedback mechanism where OCT images are acquired during the surgical procedure and processed to detect surgical byproducts. The system provides real-time feedback by modifying the scan pattern based on detected features, enabling the surgeon to adjust the surgical process and prevent complications such as posterior capsule punctures or incomplete capsulotomies.
Solution Approach 2:
The system performs preliminary detection of surgical byproducts and potential complications before they become critical issues. By continuously monitoring the surgical field and identifying problems early, the system enables preventive actions to be taken, improving surgical safety before complications can develop.
2Reliability
If the imaging system operates at high speed to provide real-time feedback, then surgical safety improves, but the system complexity increases
Solution Approach 1:
The OCT imaging system serves multiple functions: it provides structural imaging of ocular tissues, detects surgical byproducts, monitors for complications, and guides laser scan patterns. By consolidating these functions into a single integrated system, the patent reduces overall system complexity while maintaining high imaging speed and surgical safety.
Solution Approach 2:
The patent combines the imaging function, detection algorithm, and scan control into an integrated system. The OCT processor directly interfaces with the laser controller to modify scan patterns based on real-time image analysis, eliminating the need for separate systems and reducing complexity.
3Speed
If the OCT imaging system acquires images at high frame rates, then real-time feedback is available, but the loss of time for processing and analyzing images increases
Solution Approach 1:
The system extracts only the critical information needed for surgical guidance from the full OCT images. By focusing on detecting specific surgical byproducts and complications rather than processing complete image data, the system minimizes processing time while maintaining real-time feedback capability.
Solution Approach 2:
The system performs partial processing by analyzing only the portions of images that contain surgical byproducts or potential complications. This selective approach reduces the overall processing time while still providing comprehensive monitoring of the surgical field for safety-critical features.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables precise and safe cataract surgery by providing timely and actionable imaging feedback, reducing the risk of complications and improving the overall precision and safety of the procedure.
Implementation Method 1
Spectral Domain Optical Coherence Tomographic imaging system capable of generating images and performing analysis at a rate of at least 5 frames per second
Data Source
AI summary
A surgical system includes a laser source to generate a first set of laser pulses; a guiding optic to guide the first set of laser pulses to a target region; a laser controller to generate an electronic representation of a target scan pattern, and to control the guiding optic to scan the first set of laser pulses according to a portion of the target scan pattern to create a first photo-disrupted region in the target region; and a OCT imaging system to generate an image of a portion of the first photo-disrupted region. The laser controller can generate an electronic representation of a modified scan pattern in relation to the image generated by the SS-OCT imaging system, and control the guiding optic to scan a second set of laser pulses according the modified scan pattern.