CT Calibration Data Selection for Shorter Calibration Time
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Solution Overview
Problem
Existing CT systems require a lengthy calibration process due to the need for multiple calibration scans, which increases the time required for system calibration.
Innovation Solution
A medical system that selects calibration data based on usage frequency and weighting coefficients to determine update frequencies, reducing the number of calibration scans needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple calibration scans are executed to acquire calibration data for different parameter combinations, then the calibration accuracy is improved, but the time required for calibration becomes long
Solution Approach 1:
The patent extracts only the necessary calibration data by selecting calibration data based on usage frequency and imaging purposes, rather than acquiring all possible calibration data for all parameter combinations. This reduces the calibration time while maintaining accuracy for the most critical applications.
Solution Approach 2:
The patent applies different calibration strategies to different calibration data based on their usage frequency and imaging purposes. High-frequency calibration data is updated more frequently, while low-frequency data is updated less frequently, optimizing the balance between accuracy and time consumption.
2Measurement precision
If calibration data is updated frequently to maintain accuracy, then the measurement precision is improved, but the time required for calibration increases
Solution Approach 1:
The patent implements dynamic update frequency for calibration data based on usage patterns. The update frequency is not fixed but adapts according to how frequently each calibration data is used and the imaging purposes, optimizing both accuracy and efficiency.
Solution Approach 2:
The patent changes the update frequency parameter of calibration data based on usage frequency and imaging purposes. By adjusting this parameter dynamically, the system maintains high accuracy for critical data while reducing updates for less critical data, thereby improving overall calibration efficiency.
Data Source
AI summary
Methods and systems are described that shorten a time required for calibration. A medical system being a CT system for performing imaging to obtain CT images of a subject, the CT system including one or a plurality of processors, the one or a plurality of processors performing, each time an imaging is performed, selection of calibration data to be used to reconstruct an image from a plurality of calibration data, and determination of an update frequency of each calibration datum based on both a number of times each calibration datum is used and a weighting coefficient according to an imaging purpose of the executed imaging.