Positional Information Display Device for Surgical Instrument Tracking
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Solution Overview
Problem
Current methods for understanding the three-dimensional positional relationship between surgical instruments and human body structures during medical procedures, such as surgical operations and catheter treatments, are limited by the use of two-dimensional radioscopic images, which can lead to errors in instrument insertion and increased surgery time due to reliance on doctor experience and intuition, and require either changing the imaging angle or using multiple imaging apparatuses, reducing workspace and necessitating sensor attachment.
Innovation Solution
A positional information display device that derives and displays the distance and angle between preoperative and intraoperative positions of surgical instruments within a common coordinate system, using a radiography apparatus with multiple radiation sources and a detection unit to generate radiographic images, allowing for accurate visualization of instrument position relative to body structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a two-dimensional radioscopic image is used to understand the three-dimensional positional relationship, then the imaging process is simple, but the positional accuracy and understanding of spatial relationships deteriorate
Solution Approach 1:
The patent overlays two-dimensional radioscopic images with three-dimensional anatomical model images to create a composite display that provides spatial depth information. This allows the system to maintain the simplicity of 2D imaging while gaining the positional accuracy benefits of 3D visualization through the superposition of anatomical structures and instrument positions.
2Measurement precision
If multiple imaging apparatuses are used to achieve three-dimensional visualization, then the positional accuracy improves, but the workspace and operational efficiency deteriorate
Solution Approach 1:
The patent combines multiple imaging modalities (radioscopic imaging and three-dimensional anatomical modeling) into a single integrated display system. This merging allows the system to achieve comprehensive three-dimensional visualization using one imaging apparatus while maintaining full workspace availability and operational efficiency.
3Measurement precision
If the imaging angle is changed during the procedure to understand three-dimensional position, then the positional accuracy improves, but the surgery time increases
Solution Approach 1:
The patent performs three-dimensional anatomical modeling and position planning before the actual surgical procedure. By pre-establishing the spatial relationships and instrument paths in the three-dimensional model, the system eliminates the need for time-consuming angle changes during surgery, as all positional information is already visualized in the preoperative plan.
4Measurement precision
If sensor attachment is used to track instrument position, then the positional accuracy improves, but the device complexity and preparation requirements increase
Solution Approach 1:
The patent creates a three-dimensional digital copy or model of the anatomical structures and instrument positions through image processing and spatial reconstruction. This virtual copying approach provides accurate instrument position tracking without requiring physical sensors to be attached to the instruments, thereby reducing device complexity and preparation requirements.
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
Enables precise understanding of the positional relationship between surgical instruments and body structures, reducing errors and surgery time by providing a clear, three-dimensional representation of instrument placement, thus improving procedural accuracy and efficiency.
Implementation Method 1
a radiography apparatus with multiple radiation sources and a detection unit to generate radiographic images
Data Source
AI summary
A first positional information derivation unit derives first positional information indicating at least one first position related to the insertion of an insertion structure into a target structure in a subject from a preoperative image acquired before a medical procedure for the subject. A second positional information derivation unit derives second positional information indicating at least one second position on the insertion structure from an intraoperative image acquired during the medical procedure for the subject. A display control unit displays, on a display unit, a positional information screen including at least one of a distance between the first position and the second position or an angle related to the first position and the second position on the basis of the first positional information and the second positional information in a coordinate system common to a coordinate system of the preoperative image and a coordinate system of the intraoperative image.