Neural Network Bone Density Estimation from Plain X-Rays

Resolve Bottlenecks,
Find Innovative Solutions
Generate Solutions

Solution Overview

Problem

Existing technologies lack efficient and cost-effective methods for estimating bone density using readily available imaging data, such as plain X-ray images, without the need for expensive equipment like DEXA apparatuses.

Innovation Solution

A neural network-based estimation apparatus that utilizes learned parameters to estimate bone density from plain X-ray images, including convolutional layers and pooling layers, allowing for bone density estimation using image data from various body parts and orientations, even when the imaging parts and exposure directions differ.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If DEXA apparatuses are used for bone density estimation, then measurement precision is improved, but device complexity and cost increase

Engineering Contradiction:
Improvebone density estimation accuracyVSAvoidequipment complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent creates a virtual copy of the DEXA measurement capability by training a neural network on DEXA image data. The trained model then processes plain X-ray images to estimate bone density, effectively copying the estimation capability without requiring actual DEXA hardware. This resolves the contradiction by achieving similar measurement precision through software-based simulation rather than expensive specialized equipment.

Inventive Principle:
Principle #26Copying

Solution Approach 2:

The patent replaces expensive, complex DEXA apparatuses with a computationally efficient neural network model that can be deployed on standard computing infrastructure. The model processes images quickly and can be updated or replaced without hardware changes, embodying the principle of using cheaper, more flexible computational resources instead of expensive physical equipment.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

2Measurement precision

If DEXA apparatuses are used for bone density estimation, then measurement precision is improved, but cost increases

Engineering Contradiction:
Improvebone density estimation accuracyVSAvoidimplementation cost
Core Design Contradiction:
Measurement precisionVSEase of manufacture

Solution Approach 1:

The patent creates a virtual copy of the DEXA measurement capability by training a neural network on DEXA image data. The trained model then processes plain X-ray images to estimate bone density, effectively copying the estimation capability without requiring actual DEXA hardware. This resolves the contradiction by achieving similar measurement precision through software-based simulation rather than expensive specialized equipment.

Inventive Principle:
Principle #26Copying

Solution Approach 2:

The patent replaces expensive, complex DEXA apparatuses with a computationally efficient neural network model that can be deployed on standard computing infrastructure. The model processes images quickly and can be updated or replaced without hardware changes, embodying the principle of using cheaper, more flexible computational resources instead of expensive physical equipment.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

3Ease of operation

If plain X-ray images are used for bone density estimation, then ease of operation is improved, but measurement precision deteriorates

Engineering Contradiction:
Improveusability with existing imaging dataVSAvoidbone density estimation accuracy
Core Design Contradiction:
Ease of operationVSMeasurement precision

Solution Approach 1:

The patent introduces a neural network model as an intermediary between plain X-ray images and bone density estimation. The model learns the complex mapping relationship from X-ray image features to bone density values, acting as a mediator that translates readily available X-ray data into accurate bone density estimates. This resolves the contradiction by bridging the gap between simple input data and precise output measurements through intelligent intermediate processing.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent transforms the estimation approach by changing from direct measurement (which requires DEXA) to indirect estimation through learned parameters. The neural network learns optimal parameters and features from training data that correlate with bone density, enabling accurate estimation from plain X-rays. This parameter transformation resolves the contradiction by finding alternative measurement pathways that maintain precision while improving accessibility.

Inventive Principle:
Principle #35Parameter changes

4Adaptability or versatility

If image data from various body parts and orientations are used, then adaptability is improved, but device complexity increases

Engineering Contradiction:
Improveflexibility with different imaging parts and orientationsVSAvoidneural network complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent creates a universal neural network model that can process X-ray images from multiple body parts and orientations using the same architecture and processing pipeline. The model is trained on diverse data including lateral and PA views of vertebrae, enabling it to handle various imaging scenarios without requiring separate specialized models. This resolves the contradiction by achieving broad adaptability through a single multi-functional system rather than multiple specialized devices.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent employs segmentation within the neural network to identify and process different vertebral bodies and their components (cortical and cancellous bone regions) independently. This segmentation approach allows the model to handle variations in orientation and body part while maintaining consistent estimation accuracy, resolving the contradiction by breaking down complex varied inputs into manageable standardized processing units.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentUS20250329018A1Estimation apparatus, estimation system, and computer-readable non-transitory medium storing estimation program
Publication Date: 2025.10.23 KYOCERA CORP
  • US20250329018A1 patent drawing
  • US20250329018A1 patent drawing
  • US20250329018A1 patent drawing

AI summary

An estimation apparatus includes an input unit and an approximator. Input information including an image in which a bone appears is input into the input unit. The approximator is configured to determine an estimation result related to bone density of the bone from the input information. The approximator includes a learned parameter to obtain the estimation result.