Radiation Imaging Control for Delay-Compensated Dose Cutoff
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing radiation imaging systems struggle to accurately control radiation irradiation due to high dose rates causing cumulative doses to exceed thresholds before irradiation can be stopped, leading to excessive radiation exposure.
Innovation Solution
A radiation imaging apparatus with a sensor unit and control unit that measures cumulative dose, irradiation time, and irradiation stop threshold, using communication delay times to accurately transmit irradiation stop signals to the radiation generation apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the radiation generation apparatus operates at high dose rate to improve imaging speed and productivity, then the cumulative dose reaches the threshold in a very short time (several milliseconds), but this causes the cumulative dose to exceed the threshold before the irradiation stop timing notification can be transmitted, leading to inaccurate control processing
Solution Approach 1:
The system performs preliminary measurement of the communication delay time between the radiation imaging apparatus and the radiation generation apparatus before actual imaging. This measured delay time is then used to calculate the irradiation stop timing in advance, allowing the system to compensate for the communication delay and accurately stop irradiation at the correct cumulative dose threshold even at high dose rates.
Solution Approach 2:
The system establishes a feedback loop where the actual cumulative dose is continuously monitored by the sensor unit, compared against the target cumulative dose, and used to dynamically adjust the irradiation stop timing calculation. The communication delay time measurement and irradiation stop timing notification form a closed-loop feedback system that ensures accurate control despite high dose rates.
2Ease of operation
If the system transmits irradiation stop timing notification in advance to allow processing time, then the control processing can be prepared, but this causes the cumulative dose to exceed the threshold before the notification is made when dose rate is high
Solution Approach 1:
The system dynamically calculates the irradiation stop timing based on the measured communication delay time and the current cumulative dose rate. By changing the stop timing parameter in real-time according to the actual communication conditions and dose rate, the system achieves both adequate processing time and accurate cumulative dose 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
Enables precise control over radiation exposure by adjusting irradiation stop thresholds based on communication delays and dose rates, ensuring the cumulative dose matches the target value.
Implementation Method 1
a sensor unit configured to detect radiation from a radiation generation apparatus
Data Source
AI summary
Provided is a mechanism for enabling a radiation generation apparatus to accurately perform control processing to stop irradiation of radiation. The mechanism includes a dose calculation unit that calculates a cumulative dose of radiation detected by a sensor unit from start of imaging, a timer unit that measures an irradiation time for radiation from a predetermined timing, a threshold decision unit that sets an irradiation stop threshold based on the irradiation time, a control unit including a threshold determination unit that transmits an irradiation stop signal to stop irradiation of radiation to the radiation generation apparatus when the cumulative dose reaches the irradiation stop threshold, and a sensor unit that detects radiation from the radiation generation apparatus. When the dose calculation unit calculates the cumulative dose having reached a predetermined amount from start of imaging, the threshold determination unit causes the timer unit to start measurement of the irradiation time.