-
公开(公告)号：US11607181B2
公开(公告)日：2023-03-21
申请号：US16041462
申请日：2018-07-20
发明人： Liewei Sha , Dawei Gui , Yawei Liu , Yan Ma , Haonan Wang
摘要： Methods and systems are provided for cardiac triggering of an imaging system. a method for an imaging system comprises acquiring, during a scan of a subject, an electrical signal indicating a periodic physiological motion of an organ of the subject, inputting a sample of the electrical signal into a trained neural network to detect whether a peak is present in the sample, triggering acquisition of image data responsive to detecting the peak in the sample, and not triggering the acquisition of image data responsive to not detecting the peak in the sample. In this way, the timing of data acquisition may be optimally and robustly synchronized with a cardiac cycle.
-
公开(公告)号：US11486950B2
公开(公告)日：2022-11-01
申请号：US16052427
申请日：2018-08-01
摘要： Methods and systems are provided for automated graphical prescriptions with deep learning systems. In one embodiment, a method for a medical imaging system comprises acquiring, by the medical imaging system, localizer images of a subject, generating, by a trained neural network system, a graphical prescription using the localizer images, and performing, by the medical imaging system, a scan of the subject according to the graphical prescription. In this way, a desired region of interest of the subject may be accurately scanned with minimal input from an operator of the medical imaging system.
-
公开(公告)号：US20200041596A1
公开(公告)日：2020-02-06
申请号：US16052427
申请日：2018-08-01
摘要： Methods and systems are provided for automated graphical prescriptions with deep learning systems. In one embodiment, a method for a medical imaging system comprises acquiring, by the medical imaging system, localizer images of a subject, generating, by a trained neural network system, a graphical prescription using the localizer images, and performing, by the medical imaging system, a scan of the subject according to the graphical prescription. In this way, a desired region of interest of the subject may be accurately scanned with minimal input from an operator of the medical imaging system.
-
公开(公告)号：US10132883B2
公开(公告)日：2018-11-20
申请号：US15169183
申请日：2016-05-31
发明人： Dashen Chu , Scott Allen Lindsay , Dawei Gui , James Hiroshi Akao , Zhu Li
摘要： In one example, an RF coil array includes a first RF coil configured to generate a magnetic field along a first axis, the first RF coil having a first surface, a second RF coil configured to generate a magnetic field along a second axis, orthogonal to the first axis, the second RF coil having a second surface, and a first foldable interconnect coupling the first RF coil to the second RF coil. The first foldable interconnect may be adjusted to couple the first RF coil to the second RF coil with a first amount of overlap and with the first surface and second surface facing a common direction, or couple the first RF coil to the second RF coil with a second amount of overlap, larger than the first amount of overlap, and with the first surface in face to face position with the second surface.
-
5.发明授权公开(公告)号：US10859646B2
公开(公告)日：2020-12-08
申请号：US15995059
申请日：2018-05-31
发明人： Shaorong Chang , Zachary Slavens , Dawei Gui
摘要： Various methods and systems are provided for selecting radio frequency coil array comprising a plurality of coil elements for magnetic resonance imaging. In one embodiment, the method includes grouping the plurality of coil elements into receive elements groups (REGs) according to REGs information; generating REG sensitivity maps; determining, for each REG, signal in a region of interest (ROI) and signal in an annefact source region based on the REG sensitivity maps; selecting one or more REGs based on the signal in the ROI and the signal in the annefact source region; and scanning the ROI with the coil elements in the one or more selected REGs being activated and the coil elements not in any selected REGs being deactivated. In this way, annefact artifacts in the reconstructed image may be reduced.
-
公开(公告)号：US10816623B2
公开(公告)日：2020-10-27
申请号：US16161401
申请日：2018-10-16
发明人： Dawei Gui , Anton M. Linz , Ajeetkumar Gaddipati , Xiaoli Zhao , Shaorong Chang , Donglai Huo
IPC分类号： G01R33/38 , G01R33/385 , G01R33/48 , G01R33/561
摘要： A system and method for reducing MRI-generated acoustic noise is disclosed. A system control of an MRI apparatus causes a plurality of gradient coils and an RF coil assembly in the MRI apparatus to generate pulse sequences that each cause an echo train to form and acquire blades of k-space data of the subject of interest from the pulse sequences, with the blades being rotated about a section of k-space compared to every other blade. The system control also causes the plurality of gradient coils to generate gradient pulses in each pulse sequence having an optimized gradient waveform that reduces an acoustic noise level generated thereby and causes the RF coil assembly to generate a 180 degree prep pulse subsequent to generation of an RF excitation pulse and prior to generation of a first RF refocusing pulse, the 180 degree prep pulse minimizing echo spacing in the echo train.
-
公开(公告)号：US10132889B2
公开(公告)日：2018-11-20
申请号：US13899691
申请日：2013-05-22
发明人： Dawei Gui , Anton M. Linz , Ajeetkumar Gaddipati , Xiaoli Zhao , Shaorong Chang , Donglai Huo
IPC分类号： G01R33/385 , G01R33/48 , G01R33/561
摘要： A system and method for reducing MRI-generated acoustic noise is disclosed. A system control of an MRI apparatus causes a plurality of gradient coils and an RF coil assembly in the MRI apparatus to generate pulse sequences that each cause an echo train to form and acquire blades of k-space data of the subject of interest from the pulse sequences, with the blades being rotated about a section of k-space compared to every other blade. The system control also causes the plurality of gradient coils to generate gradient pulses in each pulse sequence having an optimized gradient waveform that reduces an acoustic noise level generated thereby and causes the RF coil assembly to generate a 180 degree prep pulse subsequent to generation of an RF excitation pulse and prior to generation of a first RF refocusing pulse, the 180 degree prep pulse minimizing echo spacing in the echo train.
-
公开(公告)号：US20190049536A1
公开(公告)日：2019-02-14
申请号：US16161401
申请日：2018-10-16
发明人： Dawei Gui , Anton M. Linz , Ajeetkumar Gaddipati , Xiaoli Zhao , Shaorong Chang , Donglai Huo
IPC分类号： G01R33/385 , G01R33/48
CPC分类号： G01R33/3854 , G01R33/4824 , G01R33/4826 , G01R33/5617
摘要： A system and method for reducing MRI-generated acoustic noise is disclosed. A system control of an MRI apparatus causes a plurality of gradient coils and an RF coil assembly in the MRI apparatus to generate pulse sequences that each cause an echo train to form and acquire blades of k-space data of the subject of interest from the pulse sequences, with the blades being rotated about a section of k-space compared to every other blade. The system control also causes the plurality of gradient coils to generate gradient pulses in each pulse sequence having an optimized gradient waveform that reduces an acoustic noise level generated thereby and causes the RF coil assembly to generate a 180 degree prep pulse subsequent to generation of an RF excitation pulse and prior to generation of a first RF refocusing pulse, the 180 degree prep pulse minimizing echo spacing in the echo train.
-
公开(公告)号：US20140347050A1
公开(公告)日：2014-11-27
申请号：US13899691
申请日：2013-05-22
发明人： Dawei Gui , Anton M. Linz , Ajeetkumar Gaddipati , Xiaoli Zhao , Shaorong Chang , Donglai Huo
IPC分类号： G01R33/385
CPC分类号： G01R33/3854 , G01R33/4824 , G01R33/4826 , G01R33/5617
摘要： A system and method for reducing MRI-generated acoustic noise is disclosed. A system control of an MRI apparatus causes a plurality of gradient coils and an RF coil assembly in the MRI apparatus to generate pulse sequences that each cause an echo train to form and acquire blades of k-space data of the subject of interest from the pulse sequences, with the blades being rotated about a section of k-space compared to every other blade. The system control also causes the plurality of gradient coils to generate gradient pulses in each pulse sequence having an optimized gradient waveform that reduces an acoustic noise level generated thereby and causes the RF coil assembly to generate a 180 degree prep pulse subsequent to generation of an RF excitation pulse and prior to generation of a first RF refocusing pulse, the 180 degree prep pulse minimizing echo spacing in the echo train.
摘要翻译： 公开了一种用于减少MRI产生的声学噪声的系统和方法。 MRI装置的系统控制使得MRI装置中的多个梯度线圈和RF线圈组件产生脉冲序列，每个脉冲序列使得回波序列从脉冲形成并获取感兴趣对象的k空间数据的叶片 序列，与每个其他叶片相比，叶片围绕k空间的一部分旋转。 系统控制还使得多个梯度线圈在具有优化的梯度波形的每个脉冲序列中产生梯度脉冲，其减小由此产生的声学噪声电平，并且使得RF线圈组件在产生RF之后产生180度预制脉冲 激发脉冲，并且在产生第一RF再聚焦脉冲之前，180度准备脉冲使回波列中的回波间隔最小化。
-
公开(公告)号：US20200022660A1
公开(公告)日：2020-01-23
申请号：US16041462
申请日：2018-07-20
发明人： Liewei Sha , Dawei Gui , Yawei Liu , Yan Ma , Haonan Wang
IPC分类号： A61B5/00 , A61B5/0456 , A61B5/04 , A61B5/055
摘要： Methods and systems are provided for cardiac triggering of an imaging system. a method for an imaging system comprises acquiring, during a scan of a subject, an electrical signal indicating a periodic physiological motion of an organ of the subject, inputting a sample of the electrical signal into a trained neural network to detect whether a peak is present in the sample, triggering acquisition of image data responsive to detecting the peak in the sample, and not triggering the acquisition of image data responsive to not detecting the peak in the sample. In this way, the timing of data acquisition may be optimally and robustly synchronized with a cardiac cycle.
-
-
-
-
-
-
-
-
-
搜索结果
14 条记录 (耗时 0.014 秒)