Digital Radiography Partial Image Sizing for Patient Movement
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Solution Overview
Problem
Existing digital radiography methods face challenges in accurately aligning and compensating for patient movement during multiple shot exposure when taking long length images, leading to artifacts and inefficiencies in X-ray exposure.
Innovation Solution
A method that calculates the size and position of partial images based on the susceptibility of body parts to movement, ensuring the most susceptible areas cover the largest area of the detector, minimizing corrections needed for patient movement and optimizing X-ray exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple shot exposure technique is used to image elongate bodies, then the imaging area is extended beyond single detector limits, but patient movement during acquisition introduces alignment artifacts
Solution Approach 1:
The patent applies preliminary action by calculating and determining the size and position of partial images before acquisition based on susceptibility to movement. This pre-planning allows the system to optimize overlap regions and positioning strategies in advance, ensuring that when multiple shots are acquired sequentially, the images can be accurately aligned and composited without movement artifacts compromising the final elongate body image
2Adaptability or versatility
If partial images are taken with overlap to compensate for patient movement, then alignment flexibility is improved, but X-ray exposure dose increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the size and position parameters of partial images based on calculated susceptibility to movement. The system optimizes the overlap degree and positioning of each partial image, ensuring sufficient alignment flexibility while minimizing redundant X-ray exposure. By precisely controlling these parameters, the system achieves accurate composite imaging with reduced total dose compared to uniform overlapping approaches
3Device complexity
If the detector remains stationary during multiple shot exposure, then device complexity is reduced, but the ability to capture elongate bodies efficiently is limited
Solution Approach 1:
The patent applies segmentation by dividing the elongate body into multiple partial image regions that are captured in sequence with a stationary detector. The system segments the imaging task into discrete shots covering different portions of the body, then composites them into a complete elongate image. This approach maintains detector simplicity while achieving efficient coverage of large anatomical areas through coordinated positioning and image composition
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 reduces artifacts and X-ray exposure by strategically positioning partial images to account for patient movement, improving the accuracy and efficiency of long length imaging in digital radiography.
Implementation Method 1
generating a sequence of partially overlapping partial radiation images of said elongate body by multiple shot irradiation and read out of a direct radiography detector
Data Source
AI summary
Method of generating a radiation image of an elongate body by taking plural partial X-ray images on a digital radiography detector using a multiple shot exposure technique. Partial image dimensions are determined so that the partial image representing that part of the elongate body that is most susceptible of movement during the multiple shot exposure is recorded covering an as large as possible area of the detector.