MRI Pre-scan Automation for Subject Positioning and Scan Parameter Optimization
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Solution Overview
Problem
Current MRI systems require complex manual operations to adjust imaging parameters and positions, leading to inefficiencies and increased examination time due to potential misalignment of the subject within the imaging field, resulting in re-imaging and decreased examination efficiency.
Innovation Solution
An MRI apparatus and control program that perform a pre-scan to detect the extent of the examination area, automatically calculate and optimize scan parameters, and adjust the imaging position, reducing manual intervention and re-imaging needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual operations are used to adjust imaging parameters and position, then flexibility and adaptability are maintained, but examination time increases and examination efficiency decreases
Solution Approach 1:
The system performs a pre-scan before the main imaging process to obtain positioning information about the subject. This preliminary action allows the system to automatically determine optimal imaging parameters and bed position in advance, eliminating the need for time-consuming manual adjustments during the actual examination, thereby reducing examination time while maintaining accuracy
Solution Approach 2:
The imaging system automatically calculates imaging parameters (such as field of view, matrix size, and bed position) based on the pre-scan data without requiring manual intervention. The system serves itself by using its own measurement data to optimize imaging conditions, which significantly reduces examination time while maintaining or improving imaging quality
2Ease of operation
If automatic calculation of scan parameters from positioning image is used, then manual operation burden is reduced, but calculation accuracy depends on positioning image accuracy and re-imaging cannot be avoided when offset is large
Solution Approach 1:
The system performs a pre-scan specifically designed to capture the subject's positioning information before the main imaging process. This preliminary measurement allows automatic calculation of accurate imaging parameters based on actual subject position, eliminating the need for manual adjustments and preventing re-imaging even when subject offset is large
Solution Approach 2:
The system uses the pre-scan data as feedback to automatically adjust and optimize imaging parameters. The measurement results from the pre-scan are fed back into the system to calculate the optimal field of view, matrix size, and bed position, ensuring high accuracy without manual intervention and eliminating the need for re-imaging
3Speed
If bed movement automation is implemented, then positioning speed is improved, but mismatch between set position and registered imaging position causes imaging failure and re-capturing
Solution Approach 1:
The system performs a pre-scan to measure the actual subject position before initiating the main imaging process. This preliminary measurement allows the system to calculate the precise bed position needed for optimal imaging, ensuring that automated bed movement accurately positions the subject regardless of body shape or posture variations, thereby maintaining both speed and reliability
Solution Approach 2:
The pre-scan data provides feedback on the subject's actual position, which is used to dynamically adjust the bed movement control. The system uses this feedback information to calculate the correct bed position, preventing mismatches between the set position and registered imaging position, thereby eliminating imaging failures and re-capturing while maintaining fast automated positioning
Data Source
AI summary
Imaging failure of a positioning image due to the difference in the position or the size of a subject placed in the examination space is prevented, and accordingly, the extension of the examination time is prevented. A pre-scan for appropriately setting the imaging position for positioning imaging is automatically performed prior to the positioning imaging and the main imaging of an MRI apparatus, and a region where an examination part of a subject is present (the extent of the examination part) is detected using the measurement data. By using the detected extent of the examination part, it is possible to subsequently determine the imaging position or calculate the scan parameters used for imaging.