Mobile X-Ray Exposure Control Using Scout Imaging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Mobile X-ray apparatuses lack automation functions such as automatic source-detector alignment and auto-exposure control due to the absence of Bucky, leading to challenges in maintaining image quality and alignment consistency.
Innovation Solution
The X-ray apparatus employs scout imaging followed by main imaging, where scout imaging is performed for a first exposure time to generate data used to determine a second exposure time for main imaging, enabling auto-exposure control and alignment even in mobile environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a mobile X-ray apparatus is used, then portability and mobility are improved, but automatic exposure control and source-detector alignment functions are lost
Solution Approach 1:
The system performs scout imaging as a preliminary action before main imaging. The scout image is acquired with a first exposure time, and the detected signal from this preliminary image is used to determine the optimal exposure time for the subsequent main imaging, enabling automatic exposure control in mobile devices
Solution Approach 2:
The scout imaging data serves as an intermediary between the mobile device's limited capabilities and the requirement for automatic exposure control. By using the scout image signal as a mediator, the system can calculate and determine the appropriate main imaging exposure time without requiring complex automated hardware
2Loss of time
If scout imaging is performed with sampling pixels, then data processing time is reduced, but image quality may be compromised
Solution Approach 1:
The system applies partial action by reading out data from only a selected set of sampling pixels during scout imaging rather than all pixels. This reduces the amount of data that needs to be processed while still providing sufficient information to determine the main imaging exposure time, balancing speed and quality requirements
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 stabilizes auto-exposure control and alignment, ensuring high-quality X-ray images by dynamically adjusting exposure times based on scout imaging data, even when the X-ray source, object, and detector are misaligned.
Implementation Method 1
an X-ray irradiation module configured to output an X-ray
Implementation Method 2
an X-ray detector configured to detect the X-ray output from the X-ray irradiation module
Data Source
AI summary
An X-ray apparatus may include an X-ray irradiation module for outputting an X-ray; an X-ray detector for detecting the X-ray output from the X-ray irradiation module; memory storing at least one instruction; and at least one processor configured to execute the at least one instruction, wherein the at least one processor may be configured to execute the at least one instruction to control the X-ray irradiation module to output an X-ray for a first exposure time to perform scout imaging, read out X-ray detection values from a plurality of sampling pixels corresponding to some of a plurality of pixels of the X-ray detector for the first exposure time to generate scout imaging data corresponding to the scout imaging, control the X-ray irradiation module to output an X-ray for a second exposure time determined based on the scout imaging data to perform main imaging, and read out X-ray detection values from the plurality of pixels of the X-ray detector for the second exposure time to generate a main imaging image.