X-ray CT Top-Plate Reciprocation Synchronization
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Solution Overview
Problem
In X-ray CT systems using shuttle scanning, the waiting time between data acquisitions is prolonged, leading to increased radiation exposure and reduced accuracy in analyzing chronological changes, particularly in blood flow analyses, due to differences in scanning tracks and artifacts in differential images.
Innovation Solution
The X-ray CT system is configured with a top-plate moving unit, rotary moving unit, and data acquisition system, where the duration of the top plate's reciprocating movement is made an integral multiple of the revolution period of the X-ray radiator, eliminating the need for precise tracking agreement time and thus reducing waiting time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the waiting time is prolonged to allow precise tracking agreement for shuttle scanning, then the tracking agreement between data sets is improved, but the scanning duration and radiation exposure increase
Solution Approach 1:
The patent changes the timing parameters by making the reciprocating movement duration an integral multiple of the X-ray radiator revolution period. This parameter adjustment allows tracking agreement to be achieved automatically through synchronization rather than requiring extended waiting time for precise tracking agreement, thus resolving the contradiction between measurement precision and loss of time.
2Measurement precision
If the waiting time is prolonged to ensure tracking agreement, then the accuracy of differential image analysis is improved, but the radiation dose increases
Solution Approach 1:
By adjusting the timing parameter to make the reciprocating movement duration an integral multiple of the revolution period, the patent achieves tracking agreement without requiring prolonged waiting time. This reduces the total scanning duration and consequently lowers the radiation dose while maintaining the accuracy of differential image analysis.
3Measurement precision
If the reciprocating movement duration is extended to achieve precise tracking agreement, then the tracking consistency is improved, but the productivity decreases
Solution Approach 1:
The patent optimizes the reciprocating movement duration parameter to be an integral multiple of the X-ray radiator revolution period. This creates automatic synchronization that achieves tracking consistency without requiring extended waiting time, thereby maintaining high scanning efficiency and productivity.
Solution Approach 2:
The patent utilizes periodic action by synchronizing the reciprocating movement with the rotational movement of the X-ray radiator. By making the reciprocating duration an integral multiple of the revolution period, the system achieves periodic synchronization that ensures tracking consistency while maintaining efficient scanning throughput.
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 configuration shortens the data acquisition interval, reduces radiation dose, and enhances the accuracy of differential image analysis by maintaining tracking agreement without additional time for precise tracking agreement, leading to improved scanning efficiency and analysis precision.
Implementation Method 1
X-ray CT systems irradiate the subject with X-rays and acquire image data that represent a view in a predetermined sectional plane of the subject, on the basis of the X-rays that have passed through the subject
Data Source
AI summary
X-ray CT system is provided that reduces waiting time for shuttle scanning, comprising: top-plate moving unit; rotary moving unit; data acquisition system; and control unit. Top-plate moving unit displaces top plate to reciprocate in a direction from a starting point to an ending point and in the direction from the ending point to the starting point. Rotary moving unit drives X-ray radiator radiating X-rays to revolve around the subject. Data acquisition system detects X-rays passed through the subject and to gather projection data. Controller controls at least top-plate moving unit so that, during a scanning with X-rays, while projection data are gathered with reciprocating movement of top plate between the starting point and the ending point and with X-ray radiator being driven to make revolving movement, the duration required for reciprocation of the top plate movement being an integral multiple of revolution period of the revolving movement of X-ray radiator.