Radiation Imaging Dose Detection Pixel Positioning and Threshold Control
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Solution Overview
Problem
Existing radiation imaging systems face challenges in managing radiation doses accurately, leading to increased exposure for patients, especially when images are captured at insufficient or excessive doses.
Innovation Solution
A radiation imaging system comprising a radiation imaging apparatus and an imaging control apparatus, where the imaging control apparatus specifies the position of a dose detection pixel, determines a threshold, and transmits this information to the radiation imaging apparatus before imaging, allowing for precise dose management by reducing the deviation between the dose target value and the dose indicator value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a dose indicator value is displayed to guide imaging dose, then dose management capability is improved, but the deviation between the dose indicator value and the dose target value increases due to insufficient precision in existing calculation methods
Solution Approach 1:
The patent applies preliminary action by specifying the position of the dose detection pixel and determining the threshold before radiation imaging begins. The imaging control apparatus pre-configures the dose detection parameters, including selecting which pixel will serve as the dose detection pixel and calculating the threshold based on that position. This preliminary setup ensures that when imaging occurs, the dose indicator value is calculated with high precision from the outset, reducing deviation from the dose target value and improving both measurement precision and dose management reliability.
2Stability of the object's composition
If automatic density correction is performed through image processing, then output density stability is improved, but the technician's ability to notice insufficient dose decreases
Solution Approach 1:
The patent implements feedback by providing a dose indicator value that gives real-time information about the radiation dose received. The system calculates the dose indicator value based on the dose detection pixel's signal and compares it against the dose target value, then displays this information to the technician. This feedback mechanism allows technicians to immediately see whether the dose is sufficient, excessive, or appropriate, preventing the loss of dose sufficiency information that occurs with automatic density correction alone.
3Ease of operation
If the dose indicator value is calculated using conventional methods, then calculation simplicity is maintained, but the deviation from the dose target value increases leading to excessive patient exposure
Solution Approach 1:
The patent applies local quality by focusing the dose detection function on a specific pixel position rather than using all pixels or a distributed approach. The imaging control apparatus specifies exactly which pixel serves as the dose detection pixel and determines its position-based threshold. This localized approach maintains calculation simplicity by concentrating the measurement function in one specific location, while simultaneously improving dose accuracy to reduce patient exposure to excessive radiation.
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 system enables appropriate dose management by minimizing the deviation between the set dose target value and the actual dose indicator value, thereby reducing patient exposure and improving image quality.
Implementation Method 1
matrix substrates which include pixel arrays that combine switches such as thin-film transistors (TFTs) with conversion elements such as photoelectric conversion elements
Data Source
AI summary
A radiation imaging system includes a radiation imaging apparatus and an imaging control apparatus, the radiation imaging apparatus includes a dose detection pixel that detects a dose of radiation irradiated from a radiation source, and the imaging control apparatus controls the radiation imaging apparatus. Before radiation imaging, the imaging control apparatus specifies a position of the dose detection pixel in a region of interest for calculating a dose indicator value of a radiation image, determines a threshold according to the position of the dose detection pixel, and transmits the position of the dose detection pixel and the threshold to the radiation imaging apparatus. The radiation imaging apparatus makes a setting of the position of the dose detection pixel in the region of interest and the threshold transmitted from the imaging control apparatus, and performs imaging based on the setting.