X-Ray Phase Imaging Preview for Rotation-Aware Coverage Positioning
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Solution Overview
Problem
Existing X-ray phase imaging devices face issues where subjects can be excluded from the image coverage area during phase contrast imaging due to relative rotation of gratings and subjects, leading to incomplete image capture.
Innovation Solution
An X-ray phase imaging apparatus and method that includes a controller to generate a preview image and discriminatively display the image coverage area based on the relative rotation angle between gratings and the subject, ensuring the subject remains within the image coverage during phase contrast imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the plurality of gratings and the subject are rotated relative to each other to capture phase contrast images at multiple angles, then the orientation imaging capability is improved, but the subject may be excluded from the image coverage area at certain rotation angles
Solution Approach 1:
The system performs preliminary actions by displaying the preview image with the image coverage area marked before actually capturing the phase contrast image. This allows users to check whether the subject will be included in the image coverage area at the planned rotation angle and adjust the positioning accordingly, preventing subject exclusion before capture occurs.
Solution Approach 2:
The system provides feedback by displaying the preview image with the image coverage area overlaid, showing users in advance where the image will be captured at the intended rotation angle. This feedback mechanism enables users to verify subject positioning and make necessary adjustments to ensure the subject remains within the image coverage area during rotation.
2Device complexity
If the image coverage area is not displayed in the preview image, then the display complexity is reduced, but users cannot verify subject positioning before capture
Solution Approach 1:
The system applies local quality by selectively enhancing specific regions of the preview image. The image coverage area is marked with distinct visual indicators (such as frames or overlays) while the rest of the preview image remains unchanged. This localized enhancement provides users with the necessary information about image coverage without requiring complete redesign of the display system.
3Ease of operation
If the preview image is displayed without image coverage area information, then the operation is simpler, but users may capture images with subjects excluded from the coverage area
Solution Approach 1:
The system introduces an intermediary visual element (the image coverage area marking) between the preview image and the actual capture process. This intermediary indicator serves as a mediator that communicates the intended image coverage area to the user, enabling them to verify subject positioning without complicating the overall operation or requiring complex automated control systems.
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
Prevents subject exclusion from the image coverage area by allowing users to recognize and adjust the subject position before capturing the phase contrast image, ensuring complete image capture.
Implementation Method 1
an X-ray source; a detector configured to detect X-rays radiated from the X-ray source
Implementation Method 2
an X-ray Talbot imaging device having an X-ray source, a plurality of gratings and a detector
Implementation Method 3
a rotation mechanism configured to rotate the plurality of gratings and a subject relative to each other in a plane orthogonal to an optical axis direction of the X-rays
Implementation Method 4
an image processor configured to generate a phase contrast image based on a detection signal generated by the X-ray source and the detector
Data Source
AI summary
An X-ray phase imaging apparatus includes an X-ray source; a detector; a plurality of gratings; a rotation mechanism; an image processor configured to generate a phase contrast image and to generate a preview image prior to capture of the phase contrast image; and a controller configured to control function of displaying on a display the preview image, and function of discriminatively displaying on the display an image coverage area for the phase contrast image that is associated with a relative rotation angle between the plurality of gratings and a subject.