X-Ray CT Priority Data Transfer for Faster Reconstruction
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Solution Overview
Problem
Existing X-ray CT apparatuses with two-stage data transfer methods require excessive time for data acquisition and transfer, especially during electrocardiographic synchronous scanning, leading to delayed reconstruction processing and increased data volume due to shorter helical pitches, which can prolong the determination of examination success or failure.
Innovation Solution
An X-ray CT apparatus that determines priority data based on biometric information, such as electrocardiographic waveforms, to prioritize data transfer during scanning, allowing for rapid initiation of reconstruction processing by preferentially acquiring and transferring data during specific periods of minimal heart motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If two-stage transfer method is used to acquire and transfer projection data, then data transfer capacity is improved, but data transfer time increases
Solution Approach 1:
The patent segments the projection data into priority data and non-priority data based on phase information from biometric information. Priority data corresponding to phases with smaller movement amounts is identified and transferred first, while non-priority data is transferred subsequently. This segmentation allows the system to transfer essential data faster without waiting for all data to be collected, thereby reducing overall transfer time while maintaining high data transfer capacity.
2Reliability
If helical scanning is performed with shorter helical pitch for electrocardiographic synchronous scanning, then reconstruction at all phases is guaranteed, but data volume increases and transfer time increases
Solution Approach 1:
The patent extracts and identifies priority data from the complete projection data set based on phase information. By taking out only the essential priority data for transfer first, the system reduces the immediate data transfer burden while maintaining reconstruction reliability. This extraction approach allows critical data to be transferred quickly without transferring the entire large data set immediately.
Solution Approach 2:
The patent performs preliminary identification and classification of data into priority and non-priority categories before the actual transfer process. This preliminary action enables the system to prepare transfer strategies in advance, ensuring that essential data is ready for immediate transfer while less critical data can be handled subsequently, thereby reducing overall transfer time while maintaining reconstruction quality.
3Manufacturing precision
If electrocardiographic synchronous scanning is performed with two-stage transfer method, then movement artifact is reduced, but examination determination time increases
Solution Approach 1:
The patent dynamically adjusts the data transfer strategy based on phase information and movement amounts. By continuously monitoring which data corresponds to phases with smaller movement amounts and prioritizing transfer of that data, the system adapts the transfer process in real-time. This dynamic approach ensures high image quality through electrocardiographic synchronous scanning while minimizing examination determination time by transferring critical data as soon as it becomes available.
Data Source
AI summary
An X-ray CT apparatus of an embodiment acquires projection data of a subject based on X-ray detection data according to biometric information synchronous scanning and generates a CT image of the subject based on the projection data. The X-ray CT apparatus includes a first acquisition unit, a determination unit, and a second acquisition unit. The first acquisition unit acquires biometric information of the subject at a timing when the biometric information synchronous scanning has been performed. The determination unit determines, as priority data, detection data that is a target for which data transfer will be preferentially performed among X-ray detection data acquired in the biometric information synchronous scanning based on the biometric information. The second acquisition unit acquires the priority data from a storage device that holds the detection data.