X-ray Implant Positioning Feedback via Image Feature Analysis
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Solution Overview
Problem
In medical imaging, particularly in X-ray imaging, accurate subject positioning is crucial for achieving diagnostic-quality images, especially when imaging orthopedic implants. Mispositioning can render X-ray images non-diagnostic, affecting the assessment of implant placement and monitoring of implant movement over time.
Innovation Solution
A computer-implemented method and system that assist in positioning a subject with an implant in X-ray imaging by receiving X-ray image data and exam request data, determining sets of image features indicative of desired positioning, analyzing the image content for these features, and providing feedback to adjust the positioning relative to the X-ray imaging device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If automatic assessment of subject positioning is implemented, then diagnostic quality and standardization are improved, but device complexity increases
Solution Approach 1:
The system automatically analyzes X-ray images to assess subject positioning and provides feedback to the operator. This feedback mechanism enables continuous improvement of positioning accuracy by comparing actual positioning with target positioning, resolving the contradiction between improved measurement precision and increased device complexity through automated evaluation
Solution Approach 2:
The system performs self-assessment of positioning quality by automatically analyzing image features and determining whether positioning meets diagnostic requirements. This self-service capability reduces reliance on manual expert evaluation while maintaining high measurement precision
2Productivity
If manual positioning assessment is used, then device complexity is reduced, but productivity and time management deteriorate
Solution Approach 1:
The patent replaces manual mechanical assessment with automated computer-based image analysis. The system automatically extracts image features, compares them against positioning criteria, and generates assessment results, eliminating time-consuming manual evaluation and significantly improving productivity
Solution Approach 2:
The system performs preliminary automated assessment of positioning quality immediately after image acquisition. By providing rapid feedback on positioning adequacy before final image interpretation, the system enables quick decision-making about whether retakes are necessary, thereby improving patient throughput and reducing time loss
Data Source
AI summary
The present invention provides a retrospective analysis of subject and/or implant positioning. Provided is a method and device for assisting positioning of a subject having an implant in X-ray imaging. The method comprises the steps of receiving (S1) X-ray image data of the subject including the implant, receiving (S2) exam request data indicating at least an exam type to be performed for the specific implant, and determining at least one set of image features being assigned to the requested exam type and indicative for positioning of the subject and/or the implant relative to an X-ray imaging device. Further, the method comprises analyzing (S3) an image content of the received X-ray image data for the determined set of image features, and determining (S4), from the analysis of the image content, a feedback being indicative for positioning the subject and the X-ray imaging device to each other with respect to a target positioning, to be provided for assisting the positioning. Advantageously, the set of image features defines at least a contour of the implant, wherein the contour is determined to meet a corresponding target contour defined by the set of image features in case of meeting the target positioning.