MRI Motion Re-Measurement Control Using K-Space Continuity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing MRI techniques prolong imaging time by repeatedly re-measuring body movement-affected data, even when re-measurement is unnecessary, due to inadequate determination criteria based on body movement magnitude and k-space position.
Innovation Solution
An MRI apparatus with a body movement processing unit that analyzes body movement-affected data in k-space, determining re-measurement necessity based on position and continuity, optimizing processing to minimize re-measurement frequency and time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If body movement-affected data is excluded or re-measured based on body movement magnitude and k-space position, then image quality is maintained, but imaging time is prolonged due to repeated re-measurements
Solution Approach 1:
The invention changes the determination parameters from only body movement magnitude and k-space position to include the continuity characteristic of body movement-affected data. By analyzing whether affected data points are continuous or isolated in the time series, the system can more accurately determine whether re-measurement is necessary, thereby reducing unnecessary re-measurements and shortening imaging time while maintaining image quality
Solution Approach 2:
The invention introduces a feedback mechanism where the characteristics of body movement-affected data (continuity, distribution pattern) are analyzed to dynamically adjust the re-measurement decision. The system uses the detected patterns of affected data to determine subsequent processing actions, creating a closed-loop control that optimizes the balance between image quality and imaging time
2Reliability
If determination to re-take body movement-affected data is made based on body movement magnitude and k-space position, then body movement effects are corrected, but re-measurement is performed repeatedly even when unnecessary
Solution Approach 1:
The invention adds the continuity characteristic as a new determination parameter. By analyzing whether body movement-affected data points are continuous or isolated, the system can more accurately judge whether re-measurement is truly necessary, reducing unnecessary re-measurements and improving imaging efficiency while maintaining correction accuracy
Solution Approach 2:
The invention applies partial action by selectively performing re-measurement only when the continuity characteristic indicates it is necessary, rather than uniformly re-measuring all body movement-affected data. This selective approach improves efficiency by avoiding excessive re-measurements while still ensuring correction accuracy when needed
3Measurement precision
If determination of re-measurement necessity is made after collecting measurement data of certain proportion, then processing decision is delayed, but re-measurement is performed on data where it is not necessary
Solution Approach 1:
The invention performs preliminary analysis of the continuity characteristic of body movement-affected data during the data collection process itself, rather than waiting until a certain proportion of data is collected. By continuously monitoring the characteristics of affected data points, the system can make earlier determination about whether re-measurement is necessary, reducing both the delay and unnecessary re-measurements
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
Reduces imaging time while maintaining image quality by minimizing unnecessary re-measurements through precise determination criteria for body movement-affected data in k-space.
Implementation Method 1
the subject is placed in an imaging space in which a static magnetic field is generated, and imaging is performed by repeatedly applying a radio-frequency magnetic field pulse and a gradient magnetic field pulse
Implementation Method 2
imaging is performed by repeatedly applying a radio-frequency magnetic field pulse and a gradient magnetic field pulse
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present invention aims to, in a case where measurement data affected by a body movement that occurred during an examination is re-measured, reduce a time extension caused by the re-measurement. Whether or not re-measurement is necessary is determined in consideration of continuity of measurement data affected by a body movement. In addition, in a case of performing the re-measurement, measurement of a part of unmeasured measurement data is omitted in consideration of a measurement time (number of phase encoding steps) of the measurement data to be re-measured.