公开(公告)号：US10545211B2

公开(公告)日：2020-01-28

申请号：US15635898

申请日：2017-06-28

申请人： Chad Tyler Harris ,  Andrew Thomas Curtis ,  Philip Beatty ,  Jeff Alan Stainsby

发明人： Chad Tyler Harris ,  Andrew Thomas Curtis ,  Philip Beatty ,  Jeff Alan Stainsby

IPC分类号： G01R33/565

摘要： The present disclosure provides a method and system for correcting errors caused by non-linearities in a gradient field profile of a gradient coil in a magnetic resonance imaging (MRI) system. The method includes obtaining a non-linearity tensor at each voxel within the imaging space using a computer model of the gradient coil; correcting motion sensitive encoding using the non-linearity tensor; and generating a corrected image using the corrected motion sensitive encoding.

公开(公告)号：US10393837B2

公开(公告)日：2019-08-27

申请号：US15544162

申请日：2015-02-23

申请人： Geron Andre Bindseil ,  Chad Tyler Harris ,  William Bradfield Handler ,  Blaine Alexander Chronik

发明人： Geron Andre Bindseil ,  Chad Tyler Harris ,  William Bradfield Handler ,  Blaine Alexander Chronik

IPC分类号： G01R33/44 ,  G01R33/38 ,  G01R33/381 ,  G01R33/421 ,  G01R33/385

摘要： A magnetic resonance imaging (MRI) system is provided. The system includes a main field magnet generating a main magnetic field B0. Moreover, the system further includes an integrated magnet device. The integrated magnet device has field-shift shield coils and gradient coils. The MRI system further includes a removable insert comprising field-shift shield coils. At least one substrate layer is included in the integrated magnet device to provide mechanical support for the field-shift coils and the gradient coils. Moreover, a cooling mechanism is provided to cool at least some of the magnets.

公开(公告)号：US10024936B2

公开(公告)日：2018-07-17

申请号：US15526903

申请日：2014-12-09

申请人： Geron Bindseil ,  Chad Tyler Harris

发明人： Geron Bindseil ,  Chad Tyler Harris

IPC分类号： G01V3/00 ,  G01R33/381 ,  G01R33/00 ,  G01R33/385 ,  G01R33/3875

摘要： A method of manufacturing electromagnet coils for use in a magnetic resonance imaging (MRI) system is provided. The electromagnet coils are located in a non-homogeneous external magnetic field. The method comprises forming a coil representation of a coil surface for the electromagnet coils; setting limits for performance metrics for the electromagnet coils including a magnetic field-shape metric and at least one of an external torque metric and an external force metric, the external torque metric and the external force metric based, respectively, at least in part on a torque and a force exerted on the electromagnet coil by the non-homogeneous external magnetic field; forming a performance functional, based on the coil representation and the performance metrics, for generating a current density pattern over the coil surface; optimizing the performance functional and generating a current density pattern based on the optimized performance functional; and obtaining coil windings.

公开(公告)号：US20190064301A1

公开(公告)日：2019-02-28

申请号：US15690795

申请日：2017-08-30

申请人： Andrew Thomas Curtis ,  Christopher Kumar Anand ,  Chad Tyler Harris ,  Jeff Alan Stainsby ,  Phil J. Beatty

发明人： Andrew Thomas Curtis ,  Christopher Kumar Anand ,  Chad Tyler Harris ,  Jeff Alan Stainsby ,  Phil J. Beatty

IPC分类号： G01R33/565 ,  G01R33/389

CPC分类号： G01R33/56509 ,  G01R33/3854 ,  G01R33/389

摘要： The present disclosure provides a method and system of magnetic resonance imaging using a constrained gradient waveform. The constrained gradient waveform is designed to have only predetermined frequencies, for example excluding one or more identified resonant frequencies associated with the MRI system. The application of such a constrained gradient waveform during imaging may aid in reducing noise, vibration and/or heating of the MRI system during imaging.

公开(公告)号：US20180102215A1

公开(公告)日：2018-04-12

申请号：US15837123

申请日：2017-12-11

申请人： Geron André Bindseil ,  Chad Tyler Harris ,  William Bradfield Handler ,  Blaine Alexander Chronik

发明人： Geron André Bindseil ,  Chad Tyler Harris ,  William Bradfield Handler ,  Blaine Alexander Chronik

IPC分类号： H01F41/04 ,  G01R33/385

CPC分类号： H01F41/04 ,  G01R33/385 ,  G01R33/3854

摘要： A method of manufacturing electromagnet coils for use in a magnetic resonance imaging (MRI) system is provided. The method comprises forming a coil representation of a coil surface for the electromagnet coils; setting a plurality of performance metric requirements for a plurality of performance metrics for the electromagnet coils, the plurality of performance metrics including a magnetic field-shape metric and an eddy-field metric; forming a performance functional, based on the coil representation and the plurality of performance metrics, for generating a current density pattern over the coil surface; optimizing the performance functional based on the plurality of performance metric requirements; generating a current density pattern over the coil surface based on the minimized performance functional; and obtaining coil windings from the current density pattern.

公开(公告)号：US09880251B2

公开(公告)日：2018-01-30

申请号：US15102448

申请日：2015-09-04

申请人： Fergal Kerins ,  Timotheus Anton Gmeiner ,  Jeff Alan Stainsby ,  Chad Tyler Harris ,  Sheryl Rae Thingvold ,  Gregory Allan Whitton

发明人： Fergal Kerins ,  Timotheus Anton Gmeiner ,  Jeff Alan Stainsby ,  Chad Tyler Harris ,  Sheryl Rae Thingvold ,  Gregory Allan Whitton

IPC分类号： G01R33/58 ,  G01R33/48 ,  G01R33/563

CPC分类号： G01R33/58 ,  A61B5/055 ,  G01R33/4806 ,  G01R33/56341 ,  G09B23/30

摘要： Disclosed herein are cerebrospinal diffusion phantoms which include a housing having a shape and size configured for insertion into a magnetic resonance coil in one or more preselected poses. A scaffold support structure is mounted on an interior of said housing and a plurality of elongated diffusion mimicking members supported on the support array. The elongated diffusion mimicking members are affixed to the scaffold support structure such that elongated diffusion mimicking members extend in directions needed to substantially emulate a 3 dimensional arrangement of cerebrospinal diffusion fiber tracts in a living organism; as well as modules for elimination of resolution based-bias, angular accuracy evaluation, diffusion rate calibration, and quality assurance image referencing. Each elongated diffusion mimicking member includes an aqueous component which can undergo diffusion along the elongated diffusion mimicking member. The phantom includes a cerebrospinal tissue mimic matrix material contained in the housing enveloping the array of elongated diffusion mimicking members. The housing is made of a material whose magnetic susceptibility substantially matches that of the cerebrospinal mimic matrix material.

公开(公告)号：US10545212B2

公开(公告)日：2020-01-28

申请号：US15690795

申请日：2017-08-30

申请人： Andrew Thomas Curtis ,  Christopher Kumar Anand ,  Chad Tyler Harris ,  Jeff Alan Stainsby ,  Phil J. Beatty

发明人： Andrew Thomas Curtis ,  Christopher Kumar Anand ,  Chad Tyler Harris ,  Jeff Alan Stainsby ,  Phil J. Beatty

IPC分类号： G01R33/389 ,  G01R33/565

摘要： The present disclosure provides a method and system of magnetic resonance imaging using a constrained gradient waveform. The constrained gradient waveform is designed to have only predetermined frequencies, for example excluding one or more identified resonant frequencies associated with the MRI system. The application of such a constrained gradient waveform during imaging may aid in reducing noise, vibration and/or heating of the MRI system during imaging.

公开(公告)号：US09842689B2

公开(公告)日：2017-12-12

申请号：US14894212

申请日：2014-12-09

申请人： Geron André Bindseil ,  Chad Tyler Harris ,  William Bradfield Handler ,  Blaine Alexander Chronik

发明人： Geron André Bindseil ,  Chad Tyler Harris ,  William Bradfield Handler ,  Blaine Alexander Chronik

IPC分类号： G01R33/385 ,  H01F41/04

CPC分类号： H01F41/04 ,  G01R33/385 ,  G01R33/3854

摘要： A method of manufacturing electromagnet coils for use in a magnetic resonance imaging (MRI) system is provided. The method comprises forming a coil representation of a coil surface for the electromagnet coils; setting a plurality of performance metric requirements for a plurality of performance metrics for the electromagnet coils, the plurality of performance metrics including a magnetic field-shape metric and an eddy-field metric; forming a performance functional, based on the coil representation and the plurality of performance metrics, for generating a current density pattern over the coil surface; optimizing the performance functional based on the plurality of performance metric requirements; generating a current density pattern over the coil surface based on the minimized performance functional; and obtaining coil windings from the current density pattern.