Radiographic Image Capture Delay Time Calculation
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Solution Overview
Problem
Traditional radiographic image capturing systems face challenges in determining the delay time for radiation emission, leading to issues with image quality due to insufficient radiation dose or incomplete image capture, and require complex procedures involving x-ray sensors for accurate timing adjustments.
Innovation Solution
A radiographic image capturing system that includes a radiation irradiating apparatus with a notifying unit, a radiographic image capturing apparatus with radiation detecting elements, an exposure switch for two-step manipulations, and a signal transceiver to calculate the delay time as the difference between the activation signal reception and radiation emission start, allowing for simple and accurate determination of the delay time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If x-ray sensors are installed to accurately measure radiation emission timing, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The radiation detecting elements in the radiographic image capturing apparatus serve dual purposes: they both detect radiation for image formation and detect the start of radiation emission for delay time calculation. This self-service approach eliminates the need for separate x-ray sensors, thereby improving measurement precision while avoiding increased device complexity.
Solution Approach 2:
The radiation detecting elements are made multi-functional by using them for both primary image capture and secondary timing measurement. This universal usage of existing components achieves accurate radiation emission timing measurement without adding separate measurement devices, thus resolving the contradiction between measurement precision and device complexity.
2Device complexity
If delay time is not accurately determined, then device complexity is reduced, but image quality deteriorates
Solution Approach 1:
The system calculates delay time by comparing the timing of activation signals with the actual radiation emission start time detected by the radiation detecting elements. This feedback mechanism ensures accurate timing information is obtained, which is then used to precisely control the charge accumulating mode timing, thereby ensuring image quality without requiring complex additional devices.
Solution Approach 2:
The patent replaces complex mechanical timing measurement systems (such as separate x-ray sensors and mechanical switches) with an electronic signal processing approach. The delay time is calculated electronically by comparing signal timings, which simplifies the physical system while maintaining or improving measurement accuracy, thus preventing image quality deterioration.
3Device complexity
If radiation emission starts before charge accumulating mode, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The system performs preliminary calculation of the delay time using the measured value from the radiation detecting elements. This advance calculation allows the radiographic image capturing apparatus to set the charge accumulating mode start timing appropriately before radiation emission begins, ensuring that the radiation emission and charge accumulation are properly synchronized without requiring complex real-time control systems.
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 solution enables precise determination of the delay time without the need for extensive preparation or installation of x-ray sensors, improving image quality by ensuring proper timing of radiation emission during the charge accumulating mode.
Implementation Method 1
electric charges are generated in individual radiation detecting elements (corresponding to an element indicated with the reference numeral "7" in FIG. 2 described below) in proportion to the dose of irradiated radiation
Data Source
AI summary
A radiographic image capturing system includes: a radiation irradiating apparatus which emits radiation and provides notification of radiation emission while emitting the radiation; a radiographic image capturing apparatus which includes two-dimensional matrix radiation detecting elements and reads electric charges accumulated in the radiation detecting elements as image data; an exposure switch capable of two-step manipulations, the exposure switch transmitting an activation signal in response to a first-step manipulation and transmitting a radiation start signal in response to a second-step manipulation; a signal transceiver which receives the activation signal and transfers the received activation signal to the radiation irradiating apparatus; and a delay time calculating device which calculates, as a delay time, a difference between a time of reception of the activation signal at the signal transceiver and a time of start of the notification of radiation emission at the radiation irradiating apparatus.