Dual Detector X-Ray Imaging for High-Resolution Region Compensation
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Solution Overview
Problem
Conventional X-ray diagnostic apparatuses require re-imaging to observe a new region of interest, leading to increased radiation exposure and inefficiency, as they lack the capability to seamlessly switch between high-resolution and wide-field-of-view images without re-acquiring data.
Innovation Solution
The apparatus incorporates a dual-detector system with a TFT array and CMOS detector, allowing for simultaneous X-ray detection and image processing, enabling the display of high-resolution images from a CMOS detector as a compensation for partial regions of interest within images acquired by a TFT detector, thereby reducing the need for re-imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a single detector with large field of view is used, then wide coverage is achieved, but resolution for regions of interest is insufficient
Solution Approach 1:
The detector system is segmented into two distinct detectors: a first detector with a large field of view for wide coverage and a second detector with high resolution for detailed observation. This segmentation allows each detector to be optimized for its specific function, resolving the contradiction between coverage area and resolution.
Solution Approach 2:
Different regions of the imaging system are assigned different quality characteristics. The first detector provides wide-field coverage with adequate resolution, while the second detector provides high-resolution imaging for specific regions of interest. This local quality differentiation allows the system to achieve both wide coverage and high resolution where needed.
2Measurement precision
If re-imaging is performed to observe new regions of interest, then detailed observation is achieved, but radiation exposure increases
Solution Approach 1:
The system performs preliminary wide-field imaging to identify regions of interest, then uses the second high-resolution detector to observe those specific regions without requiring additional X-ray exposure. The preliminary action of identifying ROIs allows subsequent detailed observation to be achieved from already-acquired high-resolution data.
Solution Approach 2:
Instead of discarding the first image and acquiring a new one, the system recovers and utilizes the second detector's image data for regions of interest. This approach eliminates the need for re-imaging and associated radiation exposure while still providing detailed observation capability.
3Measurement precision
If re-imaging is performed to observe new regions of interest, then detailed observation is achieved, but time efficiency decreases
Solution Approach 1:
The system maintains continuous useful action by simultaneously acquiring data from both detectors during a single imaging event. The first detector continues to provide wide-field context while the second detector simultaneously captures high-resolution data, eliminating the need for sequential re-imaging and saving time.
Solution Approach 2:
The system recovers and utilizes the second detector's image data for regions of interest instead of discarding it and acquiring new images. This allows detailed observation to be achieved from already-acquired data, eliminating the time loss associated with re-imaging.
4Adaptability or versatility
If a dual-detector system is used, then both wide-field and high-resolution imaging are achieved, but device complexity increases
Solution Approach 1:
The dual-detector system achieves multi-functionality by combining a wide-field detector and a high-resolution detector in a single imaging apparatus. This universal design allows the system to perform both wide-area screening and detailed regional observation without requiring separate devices, managing complexity through integrated multi-purpose capability.
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 allows for precise observation of regions of interest with reduced radiation exposure and increased efficiency by compensating image regions without the need for re-acquiring images, thus enhancing diagnostic capabilities while minimizing subject burden.
Implementation Method 1
an X-ray tube and an X-ray detector opposite to each other
Implementation Method 2
a first detector using a thin film transistor (TFT) array and having a large field of view (FOV) part and a second detector using a complementary metal oxide semiconductor (CMOS)
Data Source
AI summary
An X-ray diagnostic apparatus comprises an X-ray detector including a first detector and a second detector capable of simultaneously detecting X-rays irradiated from an X-ray tube, and processing circuitry configured to, when displaying one of a first image based on output from the first detector and a second image based on output from the second detector on a display, display the other one of the first image and the second image corresponding to a partial region of the one of the first image and the second image.