Bone Density Measurement Using Hydroxyapatite Reference Body
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Solution Overview
Problem
Existing methods for evaluating bone density from X-ray images, particularly for alveolar bone, face challenges in expressing bone density universally and accurately, lacking effective imaging aids for referencing bone portions, and relying on non-universal density correction methods.
Innovation Solution
A bone density measuring system that displays an X-ray image of a bone part and a reference body on the same screen, using a reference body with a composition similar to teeth, such as hydroxyapatite, to accurately measure and calculate bone density by comparing pixel values between the reference body and bone portions, with a marker for simplified detection and three levels of image density for efficient processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a reference body with composition similar to teeth (hydroxyapatite) is used for bone density measurement, then measurement precision and universality are improved, but device complexity increases due to the need for additional reference standards and calibration procedures
Solution Approach 1:
A reference body made of hydroxyapatite (calcium phosphate) with composition similar to teeth is introduced as an intermediary standard. This reference body serves as a mediator between the X-ray imaging system and the bone tissue being measured, providing a known density standard that enables accurate calibration and universal measurement across different systems and conditions.
2Measurement precision
If multiple density levels (three levels) are used in the reference body, then measurement accuracy across different bone density ranges is improved, but the complexity of detecting and measuring multiple reference points increases
Solution Approach 1:
The reference body is segmented into three distinct density levels, each representing different bone density ranges. This segmentation allows the system to accurately measure and calibrate across the full spectrum of bone densities by comparing the bone tissue against multiple known reference points within a single standardized object.
3Ease of manufacture
If aluminum standard substance is used for density measurement, then ease of manufacture is improved, but the ability to express bone density universally (in g/cm²) deteriorates
Solution Approach 1:
The standard substance material is changed from aluminum to hydroxyapatite (calcium phosphate), which has chemical composition and density characteristics similar to bone and tooth tissues. This parameter change in material composition enables the reference body to provide universally applicable density measurements in g/cm² that are directly relevant to bone tissue, while still maintaining ease of manufacture through standardized production methods.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for accurate and universal bone density evaluation, reducing complexity and improving practical accuracy while maintaining economic benefits, enabling precise measurement of bone density with high accuracy.
Implementation Method 1
measuring the density of a photographed bone part and a reference body from an X-ray image
Implementation Method 2
measuring the density by comparing the concentration of pixel values between the bone portion and the reference body
Data Source
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AI summary
An apparatus and system for quantitatively calculating bone density using an X-ray image of a photographed bone part, in particular alveolar bone, and an imaging aid for performing X-ray imaging of alveolar bone accurately and easily. The bone density measuring apparatus of the present invention comprises an image display unit for displaying an X-ray image of a photographed bone and a reference body on the same screen, and a reference body concentration for measuring the density of the X-ray image of the displayed reference body. The bone portion by comparing the X-ray image density of the bone portion with the X-ray image density of the reference body and the bone portion density measurement portion for measuring the density of the displayed X-ray image of the bone portion And a bone density calculation unit for calculating the bone density of the bone.