X-ray Imaging System Calibration Feedback for DXA Precision
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Solution Overview
Problem
In X-ray imaging systems using dual-energy X-ray absorptiometry (DXA), maintaining the precise positional relationship between the radiation source and detector is challenging, leading to difficulties in recalibrating the system accurately, which affects bone density measurements and general imaging quality.
Innovation Solution
An X-ray imaging system with an X-ray emitter capable of emitting multiple energies, a portable detector, and a hardware processor that provides notifications for calibration image capture, ensuring accurate recalibration during DXA and general imaging by determining the necessity of calibration based on system state changes and subject presence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a cassette-type FPD is used for general imaging, then the imaging apparatus can perform both general imaging and DXA imaging, but the positional relationship between the radiation source and the radiation detector is changed by loading and unloading the FPD, making it difficult to return to the original positional relationship
Solution Approach 1:
The control apparatus detects the loading/unloading state of the FPD and automatically determines when calibration is needed. When the FPD is unloaded or the positional relationship changes beyond a predetermined range, the system provides feedback to remind the operator to perform calibration, ensuring the positional relationship is restored to the required precision level.
Solution Approach 2:
The system performs calibration before DXA imaging is performed. By establishing the correct positional relationship in advance through calibration imaging, the system ensures that subsequent DXA measurements are accurate, preventing errors from arising due to positional relationship changes.
2Adaptability or versatility
If the radiation source is moved for general imaging, then general imaging can be performed, but the positional relationship between the radiation source and the radiation detector is changed, making it difficult to return to the original positional relationship
Solution Approach 1:
The control apparatus monitors the position of the radiation source and the loading state of the FPD. When the radiation source is moved for general imaging and the FPD is loaded, the system detects this change and provides feedback to remind the operator to perform calibration to restore the precise positional relationship required for DXA imaging.
Solution Approach 2:
Calibration is performed as a preliminary step before DXA imaging when the radiation source position or FPD loading state changes. This ensures that the positional relationship is correctly established before measurements are taken, maintaining measurement accuracy.
3Ease of operation
If calibration is performed manually by the technician, then calibration can be done, but it is difficult for the technician to accurately grasp the timing, leading to re-imaging or inaccurate bone density calculation
Solution Approach 1:
The control apparatus automatically detects changes in the imaging setup (FPD loading/unloading, radiation source position changes) and provides timely feedback to the operator. This feedback mechanism ensures that calibration is performed at the correct moments without relying on the operator's memory or judgment, improving both ease of operation and calibration timing accuracy.
Solution Approach 2:
The system performs self-monitoring and self-reminding of calibration requirements. By automatically detecting when calibration is needed and providing reminders, the system reduces the burden on the operator while ensuring calibration is performed at the appropriate time, improving reliability.
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 solution ensures precise calibration and accurate bone density measurements by providing timely notifications for calibration, reducing re-imaging errors and maintaining imaging system integrity across different imaging modalities.
Implementation Method 1
an X-ray emitter capable of individually emitting a plurality of X-rays having different energies
Implementation Method 2
a portable X-ray detector that captures an X-ray image based on an X-ray emitted by the X-ray emitter
Data Source
AI summary
Disclosed is an X-ray imaging system capable of performing X-ray imaging by dual-energy X-ray absorptiometry and general imaging, the X-ray imaging system including: an X-ray emitter capable of individually emitting a plurality of X-rays having different energies; a portable X-ray detector that captures an X-ray image based on an X-ray emitted by the X-ray emitter; and a hardware processor that provides, under a predetermined condition, a first notification related to capturing of a calibration image by the X-ray detector. The hardware processor provides the first notification each time X-ray imaging by the dual-energy X-ray absorptiometry is performed or when capturing of the calibration image is determined to be necessary.