Rotatable Filter Holder for Flexible Radiographic Imaging
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Solution Overview
Problem
Conventional radiation tomography apparatuses face limitations in flexibility, as they require significant alterations to switch between image taking methods, particularly when attempting to capture subtraction tomographic images, due to the fixed installation of radiation filters and collimators, which restricts the ability to change image taking methods arbitrarily during operations.
Innovation Solution
A radiographic apparatus with a holder that rotates to control the passage of radiation through high and low voltage regions of a filter, allowing for flexible image taking operations by selecting whether radiation passes through the filter, and includes a collimator to limit the irradiation range, enabling the apparatus to perform subtraction and other image taking operations without major alterations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the filter is fixedly installed adjacent to the radiation source, then the radiation beam can be assuredly filtered, but the image taking method cannot be changed flexibly
Solution Approach 1:
The filter is mounted on a rotatable holder instead of being fixedly installed. The holder can rotate to bring different filter regions (high voltage region and low voltage region) into the radiation beam path as needed, enabling flexible switching between different image taking methods while maintaining reliable filtering when required.
Solution Approach 2:
The filter is divided into distinct functional regions: a high voltage region for high voltage irradiation and a low voltage region for low voltage irradiation. These segmented regions are arranged on the rotatable holder, allowing selective positioning of the appropriate region into the beam path depending on the imaging requirements.
2Measurement precision
If the radiation source and FPD move synchronously to take tomographic images, then tomographic images can be obtained, but the apparatus cannot perform subtraction image operations without major alterations
Solution Approach 1:
The rotatable holder with multiple filter regions enables the apparatus to perform multiple image taking methods including subtraction tomography, high voltage tomography, and low voltage tomography using the same basic imaging mechanism, eliminating the need for major alterations to perform different types of imaging operations.
3Adaptability or versatility
If filters are switched by operating a controller, then different radiation qualities can be achieved, but the device complexity increases
Solution Approach 1:
The rotatable holder acts as an intermediary mechanism that physically positions different filter regions into the beam path. This mechanical intermediary simplifies the control system compared to electronically switching filters, as it provides a straightforward rotational movement controlled by the controller to achieve different radiation qualities.
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
The apparatus can seamlessly switch between image taking methods by rotating the holder, allowing for immediate continuation of operations without the need for extensive modifications, providing a flexible and efficient means to perform both subtraction and non-subtraction image taking operations.
Implementation Method 1
a filter having a high voltage region through which the radiation irradiated when the radiation source is in a high voltage state passes and a low voltage region through which the radiation irradiated when the radiation source is in a low voltage state passes
Data Source
AI summary
A radiographic apparatus and method of obtaining images using a radiographic apparatus are disclosed. The radiographic apparatus and method use a filter having different regions for different radiation states. The filter is configured to be moved during different irradiating radiation steps. The radiation from the different steps is detected and may be used to generate an image.