Fluoroscopy Irradiation Field Alignment for Bladder Imaging
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Solution Overview
Problem
During urinary organ contrasting inspections using fluoroscopy for digestive organs, subjects are often over-irradiated, and picture blurring and distortion occur due to oblique photography, increasing the burden on both the subject and the operator.
Innovation Solution
The fluoroscopy system includes a control mechanism that ensures the foot side end of the X-ray irradiation field aligns with the foot side end of the X-ray image detector, allowing for precise positioning and reducing over-irradiation by adjusting the X-ray tube and image detector movements based on the selected inspection mode, either digestive or urinary organ inspection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the practical moving limit position of the X-ray tube device is expanded to the first moving limit position to enable urinary organ contrasting inspection, then the adaptability of the fluoroscopy for different inspection types is improved, but the subject is over-irradiated due to the wide irradiation field required to cover regions near the end of the table top
Solution Approach 1:
The patent applies local quality by making the irradiation field adjustable in size and position. The control section selectively sets the irradiation field size based on the inspection type (digestive organ vs. urinary organ), ensuring that the irradiation is concentrated only on the necessary region rather than uniformly covering the entire detector area. This resolves the over-irradiation problem while maintaining adaptability for different inspection types.
2Measurement precision
If the irradiation field is widened to cover the bladder located near the end of the table top, then the detectability of the region of interest is improved, but picture blurring and distortion occur due to oblique photography
Solution Approach 1:
The patent applies dynamics by making the irradiation field configurable in both size and position through the control section. For urinary organ inspection, the system dynamically adjusts the irradiation field to be narrower and positioned to cover only the bladder region, rather than using a fixed wide field. This dynamic adjustment ensures that the region of interest is always imaged with central, perpendicular X-ray beams, eliminating oblique photography effects while maintaining detectability.
3Adaptability or versatility
If the X-ray tube device is positioned at the first moving limit position to photograph the bladder, then the position flexibility is improved, but the subject bears heavy burden due to repeated re-positioning operations
Solution Approach 1:
The patent applies self-service by implementing automatic control of the irradiation field settings through the control section. The system automatically selects and configures the appropriate irradiation field size and position based on the inspection type, eliminating the need for manual re-positioning operations by the operator. This reduces the burden on the subject while maintaining the flexibility to perform different types of inspections.
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 prevents over-irradiation and minimizes picture blurring and distortion by ensuring the X-ray beam passes centrally through the region of interest, reducing the need for re-positioning and thereby alleviating the burden on both the subject and the operator.
Implementation Method 1
an X-ray tube, movably held in a body axis direction of the subject parallel to the table top
Data Source
AI summary
When urinary organ contrasting inspection is performed by using a fluoroscopy for digestive organs, a region of interest such as a bladder often comes to a vicinity of a foot side end of a table top. Consequently, it is often the case that an irradiation field cannot be limited to a suitable area with respect to the region of interest and only an oblique photography can be performed. When the urinary organ contrasting inspection is performed, an X-ray tube device (1), an X-ray diaphragm (16), and an X-ray image detector (3) are interlocked to enable a foot side end of the irradiation field to be consistent with a foot side end of the X-ray image detector (3). Thus, a focal point (1A) of the X-ray tube device (1) can be moved directly above the foot side end of the X-ray image detector (3).