X-ray CT Apparatus Dynamic Scanning Control for Cardiac Motion
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Solution Overview
Problem
Current X-ray CT apparatuses require cumbersome and labor-intensive adjustments of scanning parameters, such as divisional scanning data and bed moving speed, to achieve optimal time resolution and reduced exposed dose, especially when dealing with varying cardiac rates, which complicates the scanning operation and reduces examination efficiency.
Innovation Solution
An X-ray CT apparatus with a control device that calculates scanning conditions based on a time resolution rate, using a periodic motion measuring device to measure cardiac motion and adjust scanning parameters for improved image quality, allowing operators to set scanning conditions efficiently through a user-friendly interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of divisional scanning data to be collected is increased, then time resolution is improved, but exposed dose increases
Solution Approach 1:
The system automatically adjusts scanning parameters (bed moving speed, scan speed) based on the patient's cardiac rate to optimize the balance between time resolution and exposed dose. The control device modifies parameters dynamically rather than using fixed settings, allowing adaptation to different cardiac rates while maintaining optimal imaging quality and minimizing radiation exposure.
2Measurement precision
If the bed moving speed is reduced, then time resolution is improved, but scanning efficiency deteriorates
Solution Approach 1:
The system dynamically adjusts bed moving speed based on the patient's cardiac rate. When cardiac rate is high, the system automatically reduces bed moving speed to improve time resolution. When cardiac rate is low, it increases bed moving speed to maintain scanning efficiency. This dynamic adaptation eliminates the need for manual parameter adjustment while optimizing both time resolution and productivity.
3Measurement precision
If scanning parameters are manually adjusted according to cardiac rate, then image quality is optimized, but operator workload increases
Solution Approach 1:
The control device automatically measures the patient's cardiac rate using ECG signals and independently determines optimal scanning parameters without operator intervention. The system self-adjusts bed moving speed, scan speed, and other parameters based on the measured cardiac rate, eliminating the need for manual operator adjustment while maintaining optimized image quality.
Solution Approach 2:
The system incorporates feedback from ECG measurements to automatically adjust scanning parameters. The control device continuously monitors cardiac rate and uses this feedback to real-time parameter adjustment, creating a closed-loop system that optimizes image quality while reducing operator workload through automated decision-making.
Data Source
AI summary
An X-ray CT apparatus that can efficiently set a scanning condition in a scanning operation of a periodically moving internal organ such as a heart or the like is provided. The X-ray CT apparatus collects electrocardiographic information by using a periodic motion measuring device 6 (S1). Subsequently, an operator input a time resolution rate corresponding to time resolution expected in a target examination (S2). Subsequently, the X-ray CT apparatus calculates a scanning condition under which the input time resolution rate can be implemented (S3). Subsequently, the X-ray CT apparatus images a heart under the scanning condition calculated in S3 (S4). Subsequently, the X-ray CT apparatus reconstructs an electrocardiographic-synchronous image by using the scanning data obtained in S4 and the electrocardiographic information (S5). Subsequently, the X-ray CT apparatus displays the electrocardiographic-synchronous image reconstructed in S5 on a display device 5 (S6).