X-ray Imaging Control Device Retransmission Timeout Management
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Solution Overview
Problem
X-ray imaging systems face delays when switching between imaging modes due to data transfer failures, leading to potential image data loss and failure to acquire images at the desired timing.
Innovation Solution
A control device and method for digital radiation imaging that detects imaging instructions, transfers radiation image data, and executes retransmission processing within a set timeout time, with a retransmission timeout time specifically set for the last image data in one imaging mode differing from other image data, to minimize delays during mode switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If retransmission processing is performed with a sufficient timeout time to prevent data loss, then reliability of data transfer is improved, but delay in switching between imaging modes increases
Solution Approach 1:
The patent applies dynamics by making the retransmission timeout time adjustable and mode-dependent. The control device sets different timeout values based on the current imaging mode (fluoroscopy vs. still image), allowing the system to adapt between reliability-oriented and speed-oriented operation. This resolves the contradiction by enabling the timeout parameter to change dynamically rather than being fixed.
Solution Approach 2:
The patent changes the retransmission timeout parameter based on imaging mode. During fluoroscopy, a shorter timeout is used to enable rapid mode switching, while during still image capture, a longer timeout ensures complete data transfer. This parameter adaptation resolves the contradiction by optimizing timeout duration for each specific operational context.
2Reliability
If retransmission timeout time is set long for the last image data to ensure complete transfer, then data loss is reduced, but imaging operation timing is delayed
Solution Approach 1:
The patent segments the image data transfer into two categories: regular image data and the last image data of a mode. Different retransmission timeout strategies are applied to each segment. For the last image data specifically, the system can set an extended timeout to ensure complete transfer without compromising the timing of subsequent imaging operations, as this extended timeout is only applied to the final data packet of each mode.
Solution Approach 2:
The system performs preliminary identification of which image data packet is the last one before initiating transfer. By knowing in advance which packet requires extended timeout protection, the system can prepare the appropriate timeout value beforehand, ensuring that the extended retransmission time is applied only where necessary without affecting the timing of other image transfers.
3Reliability
If standard retransmission protocol is used for all image data, then data loss is minimized, but delay in acquiring images at desired timing occurs
Solution Approach 1:
The patent applies local quality by treating different image data packets with different retransmission policies based on their position in the transfer sequence. The last image data receives special treatment with extended timeout, while other data uses standard timeout. This localized differentiation ensures that reliability is enhanced only where necessary (for the critical last packet) without introducing delays for other less-critical data transfers.
Data Source
AI summary
In transfer of image data (such as an X-ray image), if for example a transfer error occurs, a retransmission timeout time limit for an item of image data that is to be transferred last, in a time sequence of image data transfer, is set to be different from a retransmission timeout time limit for at least one other item of image data which is to be transferred.