X-ray Imaging Apparatus Partial Fluoroscopy Brightness Control
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Solution Overview
Problem
Current medical diagnostic imaging apparatuses face challenges in minimizing radiation exposure during partial fluoroscopy, as existing automatic brightness control (ABC) systems may increase the X-ray dose when switching from general to partial fluoroscopy, potentially leading to reduced image clarity and increased radiation exposure.
Innovation Solution
The apparatus employs an imaging unit to capture images in a narrower X-ray irradiation area, calculates pixel statistics, and adjusts operating conditions to maintain optimal image quality, preventing an increase in radiation exposure by fixing fluoroscopy radiation conditions during partial imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If automatic brightness control (ABC) is implemented in partial fluoroscopy, then image brightness is optimized, but radiation exposure increases
Solution Approach 1:
The system pre-calculates the relationship between ROI area ratios and required brightness adjustments before partial fluoroscopy begins. During partial fluoroscopy, the predetermined adjustment value is directly applied based on the ROI area ratio, eliminating the need for real-time ABC calculations and preventing unnecessary radiation dose increases.
Solution Approach 2:
The system changes the brightness adjustment parameter based on the ROI area ratio. Instead of using fixed ABC algorithms, the system dynamically adjusts the brightness correction value according to the proportion of the ROI relative to the total irradiation area, optimizing image quality while minimizing radiation exposure.
2Object-affected harmful factors
If X-ray irradiation area is reduced for partial fluoroscopy, then radiation exposure is minimized, but image quality may deteriorate
Solution Approach 1:
The system applies different brightness correction strategies to different regions: the ROI receives enhanced brightness adjustment to ensure diagnostic quality, while the background region maintains lower brightness corresponding to reduced radiation exposure. This local quality differentiation ensures optimal image quality in the region of interest while minimizing overall radiation dose.
Solution Approach 2:
The system pre-calculates brightness adjustment values based on ROI area ratios before partial fluoroscopy begins. These predetermined adjustment values are stored and directly applied during imaging, ensuring that appropriate brightness levels are maintained in the ROI without requiring increased radiation exposure across the entire field.
3Stability of the object's composition
If ABC adjusts radiation conditions in partial fluoroscopy, then brightness consistency is maintained, but radiation dose increases
Solution Approach 1:
The system changes the brightness control parameter from radiation condition adjustment to post-processing brightness correction. Instead of modifying X-ray tube current or voltage during partial fluoroscopy, the system applies brightness adjustment values derived from ROI area ratios to the acquired images, maintaining brightness consistency without increasing radiation dose.
Solution Approach 2:
The system replaces the mechanical/radiological ABC mechanism (adjusting tube current and voltage) with an information processing approach (brightness correction based on ROI area ratio calculations). This substitution allows brightness consistency to be achieved through image processing rather than through increased radiation exposure.
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 effectively reduces radiation exposure and maintains image clarity by adjusting X-ray conditions based on pre-set thresholds, ensuring consistent image quality between general and partial fluoroscopy modes.
Implementation Method 1
an X-ray diagnosis apparatus delivers X-rays to a subject arranged between an X-ray source and an X-ray detecting unit that are oppositely arranged. The X-ray diagnosis apparatus detects X-rays passing through the subject and generates a medical image based on the detection result.
Data Source
AI summary
According to embodiments, in a medical diagnostic imaging apparatus, an imaging unit captures a subject in a second X-ray irradiation area narrower than a first X-ray irradiation area. An X-ray image generating unit generates a first X-ray image in the first X-ray irradiation area and a second X-ray image in the second X-ray irradiation area based on an imaging result by the imaging unit. The adjusting unit calculates a statistic of a pixel value of the first X-ray image and adjusts an operating condition of the imaging unit so that the statistic approaches a threshold. A control unit causes the imaging unit and the X-ray image generating unit to generate the X-ray image based on the adjusted operating condition. Subsequently, the control unit performs control for causing the imaging unit and the X-ray image generating unit to generate the second X-ray image based on the operating condition.