磁共振成像系统中梯度校准方法和装置
By using a spherical phantom for gradient calibration in a magnetic resonance imaging system and calculating the gain using magnetic resonance images, the problem of human error in traditional methods is solved, achieving more efficient and accurate gradient calibration.
CN115774228BActive Publication Date: 2026-07-17BEIJING WANDONG MEDICAL TECH CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BEIJING WANDONG MEDICAL TECH CO LTD
- Filing Date
- 2022-11-22
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Traditional gradient calibration methods for magnetic resonance imaging systems are prone to human error, leading to inaccurate gain calculations and low calibration efficiency.
Method used
A spherical phantom is used for calibration. By scanning magnetic resonance images in at least two directions, the axial distance and center point information of the spherical phantom are obtained from the images to calculate the gain in each direction, avoiding manual measurement and improving the accuracy of gain measurement.
Benefits of technology
It reduces human error, improves the efficiency of gradient calibration and the accuracy of gain calculation, and ensures the accuracy of scanned images.
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Figure CN115774228B_ABST
Abstract
本申请提供一种磁共振成像系统中梯度校准方法和装置，该方法包括：将球形模体置于磁共振成像系统中的扫描区域中心；获取球形模体至少两个方位的磁共振图像；根据磁共振图像获取球形模体的轴向距离、球形模体的理论中心点和测量中心点；根据轴向距离、理论中心点和测量中心点计算各个方向上的增益；其中，增益包括由磁共振成像系统中梯度线圈产生的增益；根据各个方向上的增益分别校准磁共振成像系统对应方向上的梯度。使用本申请实施例提供的磁共振成像系统中梯度校准方法只需要提前获取球形模体半径，其余参数均非人工手动测量，不但避免了人为误差的引入，还能够提高增益测量的精确性，从而提高梯度校准的效率。
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