Medical Marker Tracking with Property Comparison

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Solution Overview

Problem

Marker tracking systems in medical technology often face impaired marker quality due to soiling, leading to reduced accuracy and functionality, especially in orthopedic operations, as the soiling may not be immediately noticeable to treatment staff.

Innovation Solution

A medical marker tracking method that compares actual marker properties with nominal properties using a data processing unit, allowing for the detection of deviations and taking measures such as recalculating image centers or replacing markers to maintain tracking accuracy, which can include visually or acoustically indicating deviations and ensuring affected markers are not used.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If marker tracking is performed without quality checking, then the tracking system operates continuously without interruption, but marker soiling degrades accuracy and functionality unnoticed

Engineering Contradiction:
Improvetracking accuracyVSAvoidsystem complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent implements a feedback mechanism where the data processing unit continuously compares actual marker properties (brightness, shape, size, visibility) with nominal properties and provides feedback about marker quality degradation. This allows the system to detect soiling and alert users without requiring complex additional hardware, resolving the contradiction by adding intelligence to the existing tracking system rather than increasing physical complexity.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The system performs preliminary quality assessment by comparing actual marker properties with stored nominal properties before tracking errors occur. This proactive approach allows the system to detect marker soiling early and alert users to replace markers before accuracy is severely degraded, maintaining high tracking reliability without requiring constant monitoring during critical procedures.

Inventive Principle:
Principle #10Preliminary action

2Reliability

If marker quality is monitored continuously, then marker soiling is detected early, but additional processing time and computational resources are required

Engineering Contradiction:
Improvemarker qualityVSAvoidprocessing time
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The data processing unit continuously compares actual marker properties with nominal properties and provides feedback about marker quality degradation. This feedback mechanism enables early detection of soiling without requiring extensive processing time, as the system uses efficient property comparison algorithms that run in parallel with the tracking operations.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The system monitors only the most critical marker properties (brightness, shape, size, visibility) rather than all possible properties, achieving sufficient quality assessment with minimal processing. This partial monitoring approach maintains reliability while keeping processing time acceptable for real-time surgical navigation applications.

Inventive Principle:
Principle #16Partial or excessive action

3Ease of operation

If treatment staff rely on visual inspection of markers, then the system remains simple to operate, but soiling is not noticed until tracking accuracy is severely impaired

Engineering Contradiction:
Improveoperation simplicityVSAvoidsoiling detection
Core Design Contradiction:
Ease of operationVSMeasurement precision

Solution Approach 1:

The tracking system performs self-diagnosis by automatically comparing actual marker properties with nominal properties and detecting quality degradation without requiring treatment staff intervention. This self-service capability maintains operational simplicity for users while providing precise detection of marker soiling that would otherwise be invisible to human observers.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The system provides automated feedback to treatment staff about marker quality through comparisons of actual versus nominal properties. This feedback mechanism detects soiling with high precision and communicates it to users in a simple manner, bridging the gap between sophisticated detection and ease of operation.

Inventive Principle:
Principle #23Feedback

4Productivity

If the system waits for marker failure before taking action, then no additional monitoring is required, but tracking accuracy is compromised during soiling

Engineering Contradiction:
Improvetracking continuityVSAvoidpositional accuracy
Core Design Contradiction:
ProductivityVSMeasurement precision

Solution Approach 1:

The system performs preliminary quality assessment by comparing actual marker properties with stored nominal properties before tracking errors occur. This proactive detection allows the system to identify soiling conditions and alert users to replace markers before positional accuracy is severely degraded, maintaining both productivity and precision simultaneously.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The continuous feedback loop that compares actual versus nominal marker properties enables the system to detect quality degradation before it affects tracking accuracy. This allows uninterrupted productivity while maintaining measurement precision, as the system identifies and reports issues before they compromise positional data integrity.

Inventive Principle:
Principle #23Feedback

Data Source

PatentUS7970174B2Medical marker tracking with marker property determination
Publication Date: 2011.06.28 BRAINLAB AG
  • US7970174B2 patent drawing
  • US7970174B2 patent drawing
  • US7970174B2 patent drawing

AI summary

A method for tracking at least one medical marker is provided, wherein actual properties of the at least one marker are compared with nominal properties of the at least one marker. A basis for subsequent use of information obtained from the at least one marker is formed based on the comparison.