Radiation Image Orientation Correction via Cassette Detection
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Solution Overview
Problem
Existing radiation image capturing systems fail to display images in a desired orientation on a display device screen, especially when the electronic cassette is oriented horizontally or at angles other than vertical, leading to incorrect orientation of subject data without a background or complex shapes.
Innovation Solution
An apparatus and method that includes direction detecting means to determine the orientation of the radiation image recording medium with respect to the subject, generating imaging direction information, and using image direction judging means to accurately orient the subject data for correct display, regardless of the recording medium's orientation, by comparing imaging and subject pattern information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the electronic cassette is disposed in a desired direction with respect to the subject, then the radiation image can be captured, but the image may be displayed in an inverted or horizontal orientation on the display device screen
Solution Approach 1:
The system performs preliminary detection of the cassette's orientation state using direction detecting means before image capture. Based on this pre-detected orientation information, the system automatically determines the correct display orientation and applies appropriate image processing (rotation, inversion) in advance, ensuring the image will be displayed in the correct orientation without requiring manual intervention or post-processing adjustments.
Solution Approach 2:
The system incorporates direction detecting means that continuously monitors the cassette's orientation relative to the subject. This orientation information is fed back to the control unit, which then automatically adjusts the image processing parameters (rotation angles, inversion) to ensure the image is displayed in the correct orientation. This closed-loop feedback mechanism resolves the contradiction by automatically compensating for any cassette positioning variations.
2Productivity
If the radiation image information is read in a preset direction, then the image data can be generated, but the subject data may not be displayed in the desired orientation on the display device
Solution Approach 1:
The system transitions from a static, preset reading direction to a dynamic reading direction that automatically adapts to the cassette's actual orientation. The direction detecting means provides real-time orientation information, and the control unit adjusts the image processing parameters accordingly. This dynamic adjustment allows the system to maintain high productivity while ensuring accurate subject data orientation regardless of cassette positioning.
3Adaptability or versatility
If the electronic cassette is placed horizontally or at angles other than vertical, then the apparatus can be positioned flexibly, but the image cannot be properly oriented without additional processing
Solution Approach 1:
The system performs self-service by automatically detecting its own orientation state through the direction detecting means and autonomously determining the appropriate image processing parameters. The control unit uses the detected orientation information to automatically rotate or invert the image data without requiring external intervention or complex manual processing. This self-service capability reduces device complexity while maintaining high adaptability to various cassette orientations.
4Device complexity
If the direction of the electronic cassette is not detected, then the system remains simple, but the image orientation cannot be automatically corrected
Solution Approach 1:
The system discards the need for complex mechanical adjustment mechanisms by instead recovering and utilizing orientation information through electronic detection. The direction detecting means captures orientation data, and the control unit processes this information to automatically correct image orientation. This approach replaces potential mechanical complexity with electronic detection and processing, achieving automatic orientation correction without adding significant system complexity.
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
Enables the display of radiation images in any desired direction on a display device, reducing processing time and ensuring accurate orientation of subject data without the need for image processing, even when the electronic cassette is oriented horizontally or at angles other than vertical.
Implementation Method 1
by applying radiation from a radiation source through the subject to a radiation image recording medium
Implementation Method 2
a stimulable phosphor panel, which is capable of storing radiation energy representing radiation image information in a phosphor, and subsequently emitting the stored radiation energy as stimulated light from the phosphor by applying stimulating light to the phosphor
Implementation Method 3
a radiation detector employing an amorphous selenium (a-Se) film for directly converting radiation applied to the radiation image recording medium into an electric signal to be read
Implementation Method 4
an indirect conversion type radiation detector for converting radiation applied to the radiation image recording medium into visible light with a phosphor
Data Source
AI summary
A direction determination processor outputs imaging direction information representing the direction of an electronic cassette with respect to a subject during imaging of the subject. An image direction judging unit generates image direction information representing the direction of image data with respect to a reading direction in which a radiation detector is read, based on the imaging direction information, or based on the imaging direction information, imaging order information and a template. An image displaying direction determining unit generates displaying direction information, which represents a displaying direction of the image data on a display screen or a display device.