公开(公告)号：US11237235B2

公开(公告)日：2022-02-01

申请号：US16773532

申请日：2020-01-27

申请人： SYNAPTIVE MEDICAL INC.

发明人： Chad Tyler Harris ,  Philip J. Beatty ,  Alexander Gyles Panther ,  Jeff Alan Stainsby ,  David Mark Deschenes

IPC分类号： G01V3/00 ,  G01R33/3875 ,  G01R33/385 ,  G01R33/54

摘要： A method for operating a magnetic resonance imaging (MRI) system that includes: accessing data indicating a first region for imaging a portion of a subject, the portion being placed in a main magnet of the MRI system and the main magnet generating a magnetic field; selecting, from a group of available shimming coils, a first subset of shimming coils arranged and configured such that, when the shimming coils in the first subset are driven, a homogeneity of the magnetic field at the first region is increased; and driving the shimming coils in the selected first subset of shimming coils without driving other shimming coils in the group of available shimming coils such that the homogeneity of the magnetic field at the first region increases relative to the homogeneity of the magnetic field at the first region when the shimming coils of the selected first subset are not driven.

公开(公告)号：US20210263121A1

公开(公告)日：2021-08-26

申请号：US17301312

申请日：2021-03-31

申请人： Synaptive Medical Inc.

发明人： Chad Tyler Harris ,  David Mark Deschenes ,  Alexander Gyles Panther ,  Jeff Alan Stainsby ,  Philip J. Beatty

IPC分类号： G01R33/50 ,  G01R33/38 ,  G01R33/3815 ,  G01R33/44

摘要： Systems and methods for magnetic field-dependent relaxometry using magnetic resonance imaging (“MRI”) are provided. Relaxation parameters, including longitudinal relaxation time (“T1”) and transverse relaxation time (“T2”), are estimated from magnetic resonance signal data acquired at multiple different magnetic field strengths using the same MRI system. By measuring these relaxation parameters as a function of magnetic field strength, T1 dispersion data, T2 dispersion data, or both, are generated. Based on this dispersion data, quantitative physiological parameters can be estimated. As one example, iron content can be estimated from T2 dispersion data.