Radiation Image Capturing System External Synchronization
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Solution Overview
Problem
In radiation image capturing systems, the timing synchronization between internal and external synchronizing signals can lead to increased radiation exposure due to irradiation during readout processes, and temperature changes affect image quality over time, complicating moving image capturing and reducing operability.
Innovation Solution
A radiation image capturing system that switches from an internal synchronizing mode to an external synchronizing mode, delaying the readout process and irradiation timing to prevent irradiation during readout and maintaining consistent temperature, allowing immediate start of moving image capturing without additional setup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the radiation image capturing apparatus operates in internal synchronizing mode, then the readout process can be performed automatically without external control, but the radiation irradiating apparatus may irradiate radiation during the readout process causing abnormal image data and increased radiation exposure
Solution Approach 1:
An external synchronizing signal is introduced as an intermediary to coordinate the readout process of the radiation image capturing apparatus with the irradiation timing of the radiation irradiating apparatus. This external signal acts as a mediator that prevents radiation irradiation during the readout period, thereby avoiding abnormal image data while maintaining automatic operation. The external synchronizing signal synchronizes the charge accumulation period with the irradiation timing, ensuring that radiation is only applied when the detector is in a stable state ready to capture images.
2Object-affected harmful factors
If the readout process is delayed to prevent irradiation during readout, then radiation exposure is reduced, but the temperature stability of the radiation detecting elements deteriorates affecting image quality
Solution Approach 1:
The radiation image capturing apparatus performs preliminary actions by continuously accumulating charge in the radiation detecting elements even before the external synchronizing signal is received. This preliminary charge accumulation ensures that when irradiation begins, the detector is already in a stable, charge-ready state. The apparatus maintains a continuous charge accumulation mode that prepares the detector in advance, eliminating temperature instability issues that would arise from delayed readout initialization.
3Object-affected harmful factors
If external synchronizing signal is introduced to coordinate irradiation and readout timing, then radiation exposure is optimized, but the system complexity increases due to additional signal coordination
Solution Approach 1:
The external synchronizing signal serves multiple functions simultaneously: it triggers the readout process, coordinates irradiation timing, and maintains temperature stability of the detecting elements. By using a single external synchronizing signal for these multiple purposes, the system avoids the need for separate control signals for each function, thereby reducing overall system complexity while achieving optimized radiation exposure control.
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 prevents unnecessary radiation exposure and maintains image quality by synchronizing irradiation with the charge accumulating state, enabling immediate and stable moving image capturing with reduced operator complexity.
Implementation Method 1
a plurality of radiation detecting elements are arranged two-dimensionally (in a matrix) and the radiation which passes through the subject is converted to image data according to the strength and detected by the radiation detecting elements
Data Source
AI summary
A radiation image capturing system includes the following. A radiation irradiating apparatus irradiates the radiation image capturing apparatus according to control by a generator. A control device transmits an external synchronizing signal to the radiation image capturing apparatus, transmits an irradiating request signal to the generator, and synchronizes the radiation image capturing apparatus with the radiation irradiating apparatus. When the external synchronizing signal is received, the radiation image capturing apparatus switches the control mode. After the control mode is switched, the radiation image capturing apparatus starts a readout process of the image data at a timing delayed a predetermined amount of time from a timing that the external synchronizing signal is received. The control device transmits the irradiating request signal to the generator at a timing delayed a predetermined amount of time from a timing that the irradiating request signal should be transmitted to the generator.