公开(公告)号：US20210116524A1

公开(公告)日：2021-04-22

申请号：US17114661

申请日：2020-12-08

申请人： SYNAPTIVE MEDICAL INC.

发明人： JEFF ALAN STAINSBY ,  CHAD TYLER HARRIS

IPC分类号： G01R33/3815 ,  H01F6/00 ,  G01R33/50 ,  G01R33/38

摘要： A method is provided for magnetic resonance (MR) imaging near metal, including acquiring an image at a first magnetic field from a subject that includes a metal object, acquiring an image at a second magnetic field, and combining the images to provide a corrected image with reduced metal distortion. An MR imaging system for measuring near metal is also provided including a superconducting magnet to provide a magnetic field, a power supply for a current to ramp the magnetic field, a cryocooler in contact with the superconducting magnet, a magnetic field controller programmed to ramp the main magnetic field by adjusting the current generated by the power supply, a radio frequency system for transmitting and receiving signals, and a data acquisition and processing system to receive the MR signals, generate image data sets and combine the image data sets to provide a corrected image having a reduced metal distortion.