Endoscopic Surgery Support Apparatus Target Visualization
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Solution Overview
Problem
Current medical image display devices face challenges in visualizing targets during endoscopic surgery, particularly in preoperative simulation and intraoperative navigation, due to high computational demands, inaccurate deformation processing, and potential organ overlap, which hinders real-time simulation and visualization accuracy.
Innovation Solution
An endoscopic surgery support apparatus that acquires volume data, sets a model representing tissues, calculates changes in target position and orientation due to deformation, and adjusts the camera view to maintain equal positional and orientational relationships before and after deformation, allowing for improved visualization without deforming the volume data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If deformation processing is performed on volume data to visualize targets, then visualization capability is improved, but computational demand increases and processing accuracy deteriorates
Solution Approach 1:
The patent divides the tissue into a deformation model (for computing deformations) and keeps the original volume data intact (for visualization). This segmentation allows deformation calculations to be performed on a simplified model while maintaining high-quality visualization data separately, resolving the contradiction between computational efficiency and visualization accuracy.
Solution Approach 2:
The patent creates a copy of the tissue as a deformation model that replicates the mechanical properties but not the detailed visualization data. Deformations are computed on this copy and then transferred to update the position of targets in the original volume data, enabling efficient computation without compromising the quality of visualization data.
2Ease of operation
If deformation processing is applied to volume data, then target accessibility is improved, but organ overlap occurs and visualization reliability deteriorates
Solution Approach 1:
The patent separates the deformation computation function from the visualization data. The deformation model handles tissue deformation and target position updates, while the original volume data remains unchanged for reliable visualization. This prevents organ overlap in the visualization while still allowing virtual deformation operations to improve target accessibility.
Solution Approach 2:
The patent introduces a deformation model as an intermediary that computes deformation effects and transfers only the necessary information (target position and orientation changes) to the visualization system. This intermediary prevents direct manipulation of visualization data, avoiding organ overlap while maintaining visualization reliability.
3Speed
If real-time simulation is implemented with deformation processing, then interactivity is improved, but processing time increases
Solution Approach 1:
The patent segments the computational workload by performing deformations on a simplified model with fewer voxels rather than the full-volume data. This reduces the computational time required for each deformation operation, enabling real-time interactivity while maintaining accurate target position tracking.
Solution Approach 2:
The patent performs partial deformation processing by computing deformations only for the deformation model and selectively transferring relevant target position changes, rather than processing the entire volume data. This partial action reduces computation time while maintaining the necessary interactivity for real-time simulation.
Data Source
AI summary
An apparatus includes: an acquisition circuit; and a processing circuit configured to: acquire volume data; set a model representing a tissue included in the volume data; set a first view for visualizing the volume data and a position of a target in the model; acquire first operation information for deforming the model; calculate change in the position and an orientation of the target due to deformation of the model, based on the first operation information; calculate, using the calculated change in the position and the orientation of the target, a second view such that the position and the orientation of the target after the change with respect to the first view and the position and the orientation of the target before the change with respect to the second view become equal to each other; and visualize the volume data based on the second view.