公开(公告)号：US20240272259A1

公开(公告)日：2024-08-15

申请号：US18434786

申请日：2024-02-06

申请人： SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.

发明人： Xiangbin FANG ,  Can LIAO ,  Tuota XING ,  Feichao FU

IPC分类号： G01R33/58 ,  A61B5/055 ,  G01R33/565

CPC分类号： G01R33/583 ,  A61B5/055 ,  G01R33/56518 ,  A61B2560/0223

摘要： A method for calibrating a medical device is provided. The medical device may include a magnetic resonance (MR) device. The method may include switching a gradient field in at least one gradient direction of the MR device; obtaining a magnetic flux variation in the at least one gradient direction in at least one portion of a spatial region within a gradient field domain of the MR device using a magnetic flux measurement component; determining a center of the gradient field domain of the MR device based on the magnetic flux variation; and performing a mechanical adjustment on the MR device to locate the center of the gradient field domain at a target position based on the center of the gradient field domain, or adjusting an image reconstruction process to correct or eliminate an impact of inaccuracy of the center of the gradient field domain on a reconstructed image.