Wireless X-ray Detector Light Guide for Independent Exposure Monitoring
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Solution Overview
Problem
Current digital radiography systems lack the capability to independently detect the onset, intensity, termination, and total dose of X-ray exposure, particularly in portable wireless detectors, which limits their reliability and independence from the main imaging system.
Innovation Solution
A digital radiography detector system that includes a housing with a radiographic image detector assembly and a light guiding element to redirect light from a scintillator screen for detecting exposure start, end, intensity, and total dose, using a light guiding element positioned proximate the scintillator screen to direct light to a photosensor, allowing for independent detection without relying on the imaging array.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a wireless portable digital radiography detector is used, then portability and ease of operation are improved, but the ability to independently detect X-ray exposure parameters (start, end, intensity, total dose) deteriorates
Solution Approach 1:
The detector is divided into functionally independent segments: the imaging array for capturing radiographic images and the light guide with photodetector for monitoring X-ray exposure parameters. This segmentation allows the exposure detection function to operate independently of the main imaging system, enabling portable detectors to autonomously detect start, end, intensity, and total dose of X-ray exposure.
Solution Approach 2:
A light guide is introduced as an intermediary element that captures light from the scintillator screen and redirects it to photodetectors positioned at the periphery of the detector. This intermediary structure enables the exposure detection system to independently monitor X-ray parameters without interfering with the main imaging array, thus maintaining both portability and independent detection capability.
2Device complexity
If the detector relies on the main imaging system for exposure detection, then device complexity is reduced, but measurement precision and reliability of exposure parameters deteriorate
Solution Approach 1:
The scintillator screen serves multiple functions: it converts X-rays to visible light for the imaging array and simultaneously provides light for exposure parameter detection through the light guide. This multi-functionality allows the system to maintain simplicity while achieving precise independent measurement of exposure parameters including start, end, intensity, and total dose.
Solution Approach 2:
The light guide acts as an intermediary that extracts a portion of the light from the scintillator screen and directs it to dedicated photodetectors for exposure monitoring. This intermediary approach enables precise measurement of exposure parameters without adding significant complexity to the overall detector structure, as the same scintillator light is utilized for both imaging and exposure detection.
3Reliability
If a light guiding element is added to redirect light for independent detection, then independent detection capability is improved, but device complexity increases
Solution Approach 1:
The light guide is merged with the existing detector structure, utilizing the scintillator screen's light output for dual purposes. The photodetectors are positioned at the periphery of the detector assembly, combining the exposure detection function with the existing imaging structure rather than adding completely separate components, thus minimizing the increase in device complexity.
Solution Approach 2:
The scintillator screen's emitted light is utilized universally for both the primary imaging function and the secondary exposure detection function. This multi-functional use of the same light source eliminates the need for separate radiation detection components, achieving independent exposure detection while maintaining relatively simple device architecture.
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 reliable and independent detection of X-ray exposure parameters, enhancing the reliability and portability of digital radiography systems by providing accurate monitoring of exposure conditions without requiring direct connection to the imaging array.
Implementation Method 1
a scintillator screen and a detector imaging array; and a light guiding element positioned proximate the radiographic image detector assembly to redirect light for detection of a start of exposure... using light generated by the scintillator screen
Implementation Method 2
a light guiding element positioned proximate the radiographic image detector assembly to redirect light for detection of a start of exposure, a termination of the exposure, dose for the exposure or rate of dose for the exposure using light generated by the scintillator screen
Data Source
AI summary
A wireless X-ray detector for a digital radiography system with remote detection of impinging radiation from the system X-ray source onto a sensor panel having amorphous or crystalline silicon photodiodes or metal insulated semiconductor (MIS) sensors. Certain exemplary embodiments described herein can provide a digital radiography detector including a housing having first and second spaced members and side walls defining a cavity; a radiographic image detector assembly mounted within the cavity for converting a radiographic image to an electronic radiographic image, wherein the detector assembly includes a scintillator screen and a detector imaging array; and a light guiding element positioned proximate the radiographic image detector assembly to detect a start of exposure, a termination of the exposure, dose for the exposure or rate of dose for the exposure using light generated by the scintillator screen.