Resectate Surface Registration for Surgical Navigation
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Solution Overview
Problem
Current digital biopsy tools are limited in their ability to perform large-area scans due to time constraints, making it impractical to scan areas larger than 1 cm², and existing methods for determining the volume of resected tissue are cumbersome and not suitable for immediate navigation during surgical procedures.
Innovation Solution
A method that records surface data sets of the resectate and the extraction region using ex vivo scan appliances and digital biopsy tools, registering these data sets based on corresponding surface features to provide navigational support for surgeons, allowing for the rapid identification and correction of incomplete resections by establishing a surface-based correspondence between the resectate and the remaining tissue surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If digital biopsy tools are used to scan the resectate surface, then measurement precision is improved, but the scan area is limited to small sectors (a few square millimeters) due to time constraints
Solution Approach 1:
The patent divides the large-area resectate surface into multiple small sectors that can be scanned sequentially by the digital biopsy tool. Each sector is scanned with high precision, and the individual scan results are then integrated to form a complete surface map of the entire resectate, thus achieving both high measurement precision and large coverage area.
Solution Approach 2:
The system performs preliminary registration of the resectate surface features before the actual diagnostic scanning. By pre-establishing a coordinate system and mapping the surface geometry, the digital biopsy tool can efficiently navigate and scan multiple sectors without time-consuming repositioning and alignment, thereby expanding the feasible scan area within limited time.
2Productivity
If ex vivo scan appliances are used to scan the resectate, then productivity is improved by providing immediate results, but device complexity increases
Solution Approach 1:
The ex vivo scan appliance creates a digital copy or virtual model of the resectate surface, including its geometric features and tissue characteristics. This digital replica can be analyzed immediately without requiring complex physical manipulation of the actual tissue, thus improving diagnostic speed while managing device complexity through virtualization.
Solution Approach 2:
The system introduces a digital intermediate representation (the registered surface model) between the physical resectate and the diagnostic analysis. This intermediary layer allows complex diagnostic tasks to be performed on simplified digital data rather than directly on complex physical tissue, improving productivity while containing the complexity within the digital processing domain.
3Measurement precision
If multiple surface data sets are registered to establish correspondence between resectate and extraction region, then navigation precision is improved, but loss of time increases due to the registration process
Solution Approach 1:
The system performs preliminary registration of surface data sets during or immediately after the resection procedure, before the surgical team needs to make decisions about follow-up resections. By establishing the spatial correspondence between the resectate surface and the extraction region in advance, the navigation precision is optimized without causing time delays during critical decision-making moments.
Solution Approach 2:
The registration process is designed to continue seamlessly with the surgical workflow rather than interrupting it. Multiple surface data sets are registered in a continuous process that integrates with the existing surgical steps, minimizing idle time and ensuring that navigation precision is achieved without significant time loss.
Data Source
AI summary
A method for navigational support of a person performing a resection on a patient following extraction of a resectate includes recording a first surface data set of the resectate using an ex vivo scan appliance, and determining a second surface data set of the extraction region using a recording instrument. The second surface data set covers at least one part of the remaining tissue surface of the extraction region of the resectate in the patient. The method also includes registering the first surface data set of the resectate with the second surface data set of the extraction region based on corresponding surface features of the resectate and the remaining tissue surface in the extraction region, and performing at least one support measure that supports the navigation in the extraction region relative to the resectate, using the registration.