Dynamic X-ray Dose Control for CT Scan Image Clarity
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Solution Overview
Problem
Conventional CT scanners often use excessively large X-ray doses for scanning, posing radiation hazards to patients and reducing the service life of bulb tubes, while also failing to achieve clear scan images efficiently.
Innovation Solution
A method and system for calibrating and reducing X-ray doses in CT scanning by setting an initial dose, calculating subsequent doses based on image values in a region of interest, and adjusting these doses through multiple scans to achieve a clear image with minimal total X-ray exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If excessively large X-ray doses are used for CT scanning, then clear scan images can be obtained, but radiation hazards to patients increase and bulb tube service life decreases
Solution Approach 1:
The patent implements dynamic X-ray dose adjustment during the CT scanning process. The system starts with an initial dose and continuously adapts the dose based on real-time feedback from scan images, allowing the dose to vary dynamically rather than remaining fixed at an excessively high level throughout the scan.
Solution Approach 2:
The patent employs a feedback mechanism where scan images are evaluated after each scanning step, and the evaluation results are used to adjust the X-ray dose for subsequent steps. This closed-loop feedback system ensures that the dose is optimized based on actual image quality achieved, preventing unnecessary radiation exposure.
2Measurement precision
If excessively large X-ray doses are used for CT scanning, then clear scan images can be obtained, but bulb tube service life is reduced
Solution Approach 1:
The system dynamically adjusts the X-ray dose during scanning based on actual image quality requirements, rather than maintaining a constantly high dose. This reduces the cumulative thermal and radiational stress on the bulb tube, thereby extending its service life while still achieving clear images.
Solution Approach 2:
The feedback-based dose optimization ensures that the bulb tube operates at lower, more sustainable dose levels. By adjusting the dose based on actual scan image quality, the system avoids unnecessary high-dose operation that would accelerate bulb tube degradation and reduce its operational lifespan.
3Ease of operation
If conventional fixed X-ray doses are used, then scanning is simple to operate, but X-ray usage is not optimized and radiation exposure is excessive
Solution Approach 1:
The system performs self-optimization by automatically evaluating scan images and adjusting X-ray doses without requiring manual intervention. The automated feedback loop handles the complexity of dose optimization internally, maintaining ease of operation while eliminating excessive radiation exposure.
Solution Approach 2:
The system automatically changes the X-ray dose parameter based on evaluated scan image quality. This automated parameter adjustment eliminates the need for manual dose setting while optimizing radiation exposure, achieving both ease of operation and energy efficiency.
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 clear CT scan images to be obtained with significantly reduced X-ray doses, minimizing radiation exposure to patients and extending the life of CT scanner components by optimizing X-ray usage throughout the scanning process.
Implementation Method 1
a certain dose of X-ray beam is scanned to a subject to obtain scan image data
Data Source
AI summary
A method for controlling an X-ray dose of a CT scan includes: setting an initial X-ray dose; performing a first CT scan with the initial X-ray dose to obtain an initial scan image; setting a region of interest (ROI) in the initial scan image; calculating a subsequent X-Ray dose with image values of the ROI in the initial scan image; perform an additional CT scan with the calculated subsequent X-Ray dose to obtain an average image; before receiving an end instruction, repeating the following operations: recalculating a subsequent X-Ray dose with image values of the ROI in the average image and performing an additional CT scan with the calculated subsequent X-Ray dose to obtain a new average image; and saving the average image when receiving the end instruction.