X-ray CT Data Transmission Compression Error Identification
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Solution Overview
Problem
Conventional X-ray CT apparatuses face challenges in reducing data transmission costs and distinguishing between errors caused by irreversible information compression and device failures, leading to difficulties in verifying detector and DAS behavior and restarting imaging processes promptly.
Innovation Solution
The X-ray CT apparatus employs an irreversible compression method to transmit compressed data while also transmitting uncompressed verification data through the same transmission lines, using time or spatial division to maintain a transmission rate not exceeding that of the compressed data, allowing for prompt error identification and imaging restarts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If irreversible information compression method is used, then transmission rate can be guaranteed and transmission cost can be reduced, but it becomes difficult to distinguish whether errors are caused by compression or device failures
Solution Approach 1:
The patent segments the data transmission into two distinct channels: compressed data transmission for cost efficiency and uncompressed verification data transmission for error source identification. The verification data is transmitted separately through the same transmission lines using time or spatial division, allowing independent verification without affecting the compressed data stream.
Solution Approach 2:
The patent introduces uncompressed verification data as an intermediary element that mediates between the compressed data transmission and error source identification requirements. This verification data acts as a reference that can be compared against compressed data to determine whether errors originate from compression or device failures.
2Loss of information
If reversible information compression method is used, then information is preserved, but compression ratio cannot be guaranteed and transmission rate cannot be reduced
Solution Approach 1:
The patent applies partial compression by transmitting only verification data in uncompressed form while allowing the majority of data to be compressed. This partial approach to uncompressed transmission provides sufficient information for verification without requiring full uncompressed transmission, thus balancing information preservation with transmission rate reduction.
3Difficulty of detecting and measuring
If verification data is transmitted through the same transmission lines, then error source identification is enabled, but transmission rate requirements increase
Solution Approach 1:
The patent implements periodic action by transmitting verification data at specific intervals rather than continuously. The verification data is transmitted in a time-division multiplexed manner, where compression data and verification data alternate in the transmission stream, allowing the system to meet verification requirements while maintaining average transmission rates within guaranteed limits.
Solution Approach 2:
The patent resolves the transmission rate conflict by transitioning to another dimension - using spatial division or time division to multiplex verification data transmission. Instead of requiring dedicated high-speed channels, the system utilizes the existing transmission lines with divided time slots or spatial channels, effectively adding a temporal or spatial dimension to the data transmission problem.
Data Source
AI summary
According to one embodiment, an X-ray CT apparatus includes a data acquiring unit, a data processing unit and a data transmitting unit. The data acquiring unit is configured to expose an X-ray to an object, acquire detection data of the X-ray having transmitted the object and compress the detection data to generate compressed data. The data processing unit is configured to generate X-ray CT image data of the object based on the compressed data transmitted from the data acquiring unit through a transmission line. The data transmitting unit is configured to transmit uncompressed detection data of an X-ray to the data processing unit through the transmission line according to information from an input device.