Dual-Energy CT Bone Mineral Density Measurement
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Solution Overview
Problem
Current methods for determining bone mineral density values using X-ray radiation expose patients to high levels of radiation and are time-consuming, often requiring multiple uncoordinated scans with different devices, leading to increased exposure and costs.
Innovation Solution
A method and computerized tomography system that acquire two-dimensional projection overview image data using different X-ray energies, allowing for the determination of bone mineral density values by generating a bone overview image data record and identifying specific evaluation regions, thereby reducing radiation exposure and streamlining the measurement process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple uncoordinated radiography scans with different scanning devices are performed to determine bone mineral density, then measurement accuracy is improved, but radiation exposure and measurement time increase
Solution Approach 1:
The patent combines bone mineral density measurement with existing CT scanning procedures by using dual-energy X-ray detection. The system integrates the bone density measurement function into the standard CT workflow, eliminating the need for separate DXA/DEXA scans and reducing total radiation exposure while maintaining measurement accuracy through the use of two different X-ray energies to differentiate bone density from other tissues.
Solution Approach 2:
The CT scanning system is enhanced to perform multiple functions: standard anatomical imaging and bone mineral density measurement simultaneously. By equipping the X-ray source with the capability to emit two different energies and processing both signals through the evaluation unit, the system becomes a multi-functional device that eliminates the need for separate specialized equipment, thereby reducing overall radiation exposure and measurement time.
2Measurement precision
If multiple uncoordinated radiography scans with different scanning devices are performed, then measurement accuracy is improved, but measurement time and operational costs increase
Solution Approach 1:
The patent merges bone mineral density measurement with standard CT scanning procedures. The dual-energy X-ray detection system processes two different energy levels simultaneously during a single CT scan, eliminating the need for separate DXA/DEXA measurements. This integration reduces total measurement time and eliminates the coordination challenges between multiple devices while maintaining measurement accuracy.
Solution Approach 2:
The system performs continuous dual-energy detection throughout the CT scanning process, with both X-ray energies being detected and processed simultaneously at every measurement point. This continuous simultaneous measurement approach eliminates the need for sequential separate scans, thereby reducing total measurement time and improving operational efficiency.
3Measurement precision
If separate DXA/DEXA devices are used for bone density analysis, then measurement accuracy is improved, but device complexity and operational costs increase
Solution Approach 1:
The patent enhances existing CT scanning systems with dual-energy X-ray detection capability, transforming them into multi-functional devices that can perform both standard anatomical imaging and bone mineral density measurement. This eliminates the need for separate DXA/DEXA equipment, reducing overall system complexity and operational costs while maintaining measurement accuracy through the integrated dual-energy detection and processing system.
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 reduces patient radiation exposure and measurement time, eliminating the need for separate DXA/DEXA devices, and lowers operational costs by integrating bone mineral density determination into existing CT systems through software upgrades.
Implementation Method 1
X-ray radiation is used to depict the interior condition and structure of three-dimensional and non-transparent objects to be examined
Implementation Method 2
a detector arrangement for the acquisition of projection overview image data of an object to be examined
Data Source
AI summary
A method is disclosed for determining bone mineral density values of an object. In an embodiment, the method includes acquisition of first two-dimensional projection overview image data of the object to be examined in an image detail with a first X-ray energy; acquisition of at least second two-dimensional projection overview image data of the object to be examined in an image detail with at least one different second X-ray energy; determining a bone overview image data record using the first and second projection overview image data; determining at least one specific evaluation region of the image detail using the bone overview image data record; and determining a bone mineral density value for the specific evaluation region of the image detail using the image data of the bone overview image data record in the specific evaluation region. A computerized tomography system for implementing a method is also disclosed.