Virtual Lesion Overlay for RF Ablation Visualization
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Solution Overview
Problem
Current radiofrequency ablation (RFA) procedures face challenges in visualizing the exact location and size of ablated tissue due to limitations in imaging technologies, leading to difficulties in accurately positioning the RFA probe and recording the treated area, which may result in inadequate pain management and the need for additional procedures.
Innovation Solution
A system and method that generate virtual images of proposed and actual ablated tissue areas using a computer processor to estimate lesion size, shape, and location based on RF probe specifications, energy applied, and temperature, allowing for precise positioning and recording of ablation patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If imaging technologies such as x-ray, ultrasound, and CT scans are used to guide RFA probe positioning, then the probe can be positioned in the target tissue, but the ablated tissue cannot be effectively distinguished from surrounding tissue
Solution Approach 1:
The patent creates a virtual copy or representation of the ablation lesion by calculating and displaying the expected lesion geometry and location based on probe parameters and tissue properties. This virtual lesion image serves as a visual record that can be compared with actual imaging to assess ablation completeness without requiring direct visualization of the actual ablated tissue
Solution Approach 2:
The patent introduces a computational model as an intermediary between the physical ablation process and the imaging observation. The model takes probe parameters, tissue properties, and ablation conditions as inputs and generates predicted lesion images that bridge the gap between the invisible ablation process and visible imaging modalities
2Productivity
If RFA procedures are performed without visual record of ablated tissue, then the procedure can be completed, but accurate recording of treated area is difficult
Solution Approach 1:
The system creates a virtual copy of the ablation lesion that preserves all geometric and location information. This virtual lesion image serves as a permanent visual record of the treated area, enabling accurate documentation without adding significant time to the procedure
Solution Approach 2:
The system generates the virtual lesion image during or immediately after the ablation procedure by calculating the expected lesion based on probe parameters and ablation conditions. This preliminary generation of visual records ensures documentation is available without requiring post-procedure imaging or reconstruction
3Reliability
If a single RFA procedure is performed, then the procedure time is minimized, but adequate ablation of effected nerves may not be achieved requiring additional procedures
Solution Approach 1:
The system provides visual feedback by displaying the virtual lesion image that shows the predicted ablation coverage. This feedback allows the practitioner to assess whether the affected nerves are adequately covered by the ablation zone and make real-time adjustments to probe positioning or ablation parameters to ensure complete nerve ablation in a single procedure
Solution Approach 2:
The system allows for creating slightly larger ablation zones than minimally required by adjusting probe parameters, ensuring complete coverage of affected nerves. The virtual lesion imaging enables verification that the ablation zone extends sufficiently to cover all target nerves without requiring repeat procedures
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
Enhances the accuracy of RFA procedures by providing reliable virtual images for better visualization and recording of ablated tissue areas, improving pain management outcomes and reducing the need for additional procedures by ensuring precise targeting and documentation of treated areas.
Implementation Method 1
The energy is delivered by a radiofrequency probe or catheter placed within or adjacent to targeted tissue. The radiofrequency energy is then applied to the target tissue causing the tissue surrounding the probe to heat.
Implementation Method 2
RFA or radiofrequency thermocoagulation neurotomy is a known medical procedure in which neural tissue is ablated using heat generated from a medium frequency alternating current generator.
Implementation Method 3
The temperature attained within the tissue surrounding the radiofrequency probe is monitored via a thermocouple within the probe.
Data Source
AI summary
The invention includes a system for generating virtual images of proposed and designated areas on a patient's anatomy that are to be treated in a RFA procedure. The images include a size, shape, and location of lesion/ablation patterns. The virtual images include dynamic (developing) or static (developed) lesions selected for the RFA procedure. The images are provided on at least one user interface that superimposes or overlays the lesion pattern(s) on an image of a patient's anatomy that undergoes the procedure. The images can be used to accurately and efficiently conduct RFA procedures and to record the procedures with enhanced visual data to confirm treated tissue areas. The invention further includes a diagnostic method of generating images in preparation for a RFA procedure, and a method of conducting the RFA procedure in which measured parameters determine the size and shape of the ablated areas achieved in the procedure.