Movable X-ray Detector for Low-Cost CT Imaging
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Solution Overview
Problem
Existing X-ray imaging apparatuses for panoramic radiography and CT are costly due to the use of expensive CCD or MOS sensors with large image receiving areas, and they often require manual and cumbersome operations for mode switching between radiography modes.
Innovation Solution
A medical X-ray imaging apparatus with a detachable X-ray detector that uses a small, plane-shaped MOS sensor movable up and down for CT imaging, eliminating the need for expensive large sensors and allowing for automatic positioning adjustments, thereby reducing costs and simplifying operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a large image receiving area sensor (CCD or MOS) is used for X-ray CT imaging, then the imaging area is sufficient, but the cost becomes expensive
Solution Approach 1:
The patent applies the dynamics principle by making the imaging portion movable instead of stationary. A small-plane-shaped electric imaging means is used that can be positioned at different heights to capture X-ray CT images of various regions. The imaging portion moves vertically to cover different anatomical areas, eliminating the need for a large expensive sensor while maintaining comprehensive imaging capability.
2Adaptability or versatility
If mode switching between panoramic radiography and X-ray CT is implemented, then both radiographies can be executed by one apparatus, but manual operations become troublesome
Solution Approach 1:
The patent applies the self-service principle through automatic mode switching functionality. The control means automatically determines which radiography mode to use based on predetermined conditions, and the imaging portion automatically positions itself at the appropriate height. This eliminates the need for manual mode selection and height adjustment by the operator, reducing operational complexity while maintaining versatility.
3Ease of manufacture
If a small plane-shaped electric imaging means is used for X-ray CT, then the cost is reduced, but the imaging area coverage is limited
Solution Approach 1:
The patent resolves this contradiction by implementing vertical movement of the small-plane-shaped imaging means. The imaging portion can be positioned at multiple height levels to capture images of different anatomical regions. By combining the small sensor size with vertical positioning capability, the system achieves comprehensive imaging area coverage equivalent to or exceeding that of large stationary sensors, while maintaining cost effectiveness.
Data Source
AI summary
An X-ray detector for use in a medical X-ray imaging apparatus comprising a rotary means rotatable relative to an object to be examined, an X-ray generator provided at one side of the rotary means, and an X-ray detecting portion provided at the other side of the rotary means so as to face the X-ray generator. The X-ray detector is provided in the X-ray detecting portion or is detachably mounted in the X-ray detecting portion, the X-ray detector is provided with an imaging portion comprised of a plane electric imaging means extending in a two-dimensional direction used for X-ray CT and has an imaging portion positioning means for moving up and down the imaging portion in the X-ray detector.