H/M Ratio Conversion for Accurate Patient Event Probability
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Solution Overview
Problem
Conventional methods fail to accurately calculate the probability of future events for patients with heart failure using heart function diagnostic data.
Innovation Solution
A computer-readable storage medium and information processing apparatus that acquire and process a heart/mediastinum ratio (H/M ratio) from diagnostic medicine administration data, using a function defined by historical event occurrences to calculate an index indicating the probability of future events in patients, by converting H/M ratios between different imaging environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional methods are used to calculate future event probability, then the calculation process is simple, but the accuracy of the calculated index is insufficient
Solution Approach 1:
The patent transforms the H/M ratio parameter between different imaging environments using conversion functions. By changing the parameter representation (H/M ratio values) according to environment-specific functions, the system achieves accurate probability calculations across diverse imaging conditions while maintaining a consistent calculation framework.
Solution Approach 2:
The patent introduces conversion functions as intermediary elements between different imaging environments and the probability calculation system. These functions act as mediators that standardize H/M ratio data from various environments, enabling accurate future event probability prediction without requiring direct reconfiguration of the calculation model for each environment.
2Measurement precision
If H/M ratios from different imaging environments are used directly, then data processing is straightforward, but comparison accuracy between environments is poor
Solution Approach 1:
The patent applies environment-specific conversion functions to transform H/M ratio parameters into standardized values suitable for cross-environment comparison. This parameter transformation approach enables accurate comparisons between different imaging environments while maintaining efficient data processing through automated conversion.
3Measurement precision
If a universal calculation function is used for all patients, then the system is easy to operate, but the diagnostic accuracy for individual patients is reduced
Solution Approach 1:
The patent implements local quality by applying environment-specific conversion functions tailored to each imaging environment's characteristics. This allows the system to maintain ease of operation through automated selection and application of appropriate conversion functions, while achieving high diagnostic accuracy by using environment-optimized parameters for each patient's specific imaging context.
Data Source
AI summary
An object is to accurately calculate an index indicating a probability of an event occurring to a patient in the future. A mortality risk calculation unit acquires a heart/mediastinum ratio (H/M ratio), obtained by administering a heart function diagnostic medicine to a first subject, from subject data stored in a subject data storage unit, and calculates an index indicating a probability of a predetermined event occurring to the first subject by substituting the H/M ratio acquired from the subject data storage unit into a function defined in accordance with a history of occurrences of the predetermined event to a plurality of second subjects.