公开(公告)号：US11221382B2

公开(公告)日：2022-01-11

申请号：US16753096

申请日：2018-10-05

申请人： Advanced Imaging Research, Inc.

发明人： Ravi Srinivasan

IPC分类号： G01R33/34 ,  G01R33/28 ,  G01R33/341

摘要： A pediatric magnetic resonance imaging (MRI) system is provided. The pediatric MRI system includes a radio frequency (RF) coil configured to image a portion of a patient. The pediatric MRI system also includes a cryo-cooling mechanism operatively coupled to the RF coil. The cryo-cooling mechanism is configured to maintain a temperature of the RF coil within a prescribed temperature range.

公开(公告)号：US20210379318A1

公开(公告)日：2021-12-09

申请号：US16896809

申请日：2020-06-09

申请人： Advanced Imaging Research, Inc.

发明人： Ravi Srinivasan ,  Swathi R Srinivasan

IPC分类号： A61M16/10 ,  A61M16/20 ,  A61M16/00 ,  A61M16/06

摘要： A breathing apparatus includes a first air pathway for receiving ambient air and channeling the air through a portion of the breathing apparatus, a heating section operatively coupled to the first air pathway and configured to elevate a temperature of the ambient air in the first air pathway to a first prescribed temperature, and a cooling section operatively coupled to the first air pathway and configured to reduce the temperature of the ambient air heated by the heating section to a second prescribed temperature, the second prescribed temperature lower than the first prescribed temperature. A breathing circuit is coupled to the first air pathway and configured to provide the cooled air to a user.

公开(公告)号：US11206995B2

公开(公告)日：2021-12-28

申请号：US15560328

申请日：2015-03-23

申请人： Advanced Imaging Research, Inc.

发明人： Ravi Srinivasan

IPC分类号： A61B5/055 ,  G01R33/3815 ,  G01R33/28 ,  G01R33/34 ,  A61G11/00

摘要： A pediatric magnetic resonance imaging (MRI) system includes a magnet (9), an isolette (14) including a patient section for accommodating a patient, the isolette positionable relative to the magnet; and a radio frequency (RF) array (10) positionable within the patient section of the isolette (14). The RF array (10) includes a plurality of coils configured for simultaneous imaging of different portions of a patient, the plurality of coils being distinct from one another.

公开(公告)号：US5777474A

公开(公告)日：1998-07-07

申请号：US745893

申请日：1996-11-08

申请人： Ravi Srinivasan

发明人： Ravi Srinivasan

IPC分类号： G01R33/34 ,  G01R33/341 ,  G01R33/36 ,  G01R33/422 ,  G01V3/00

CPC分类号： G01R33/3628 ,  G01R33/34046 ,  G01R33/422 ,  G01R33/341 ,  G01R33/3635

摘要： An RF coil which includes an RF coil primary, an RF coil secondary, and coupling impedances that connect the two at several points along the coil peripheries. The coupling impedances are primarily reactive, and may be fixed or variable, depending on the purpose of use.

公开(公告)号：US20200284861A1

公开(公告)日：2020-09-10

申请号：US16753096

申请日：2018-10-05

申请人： Advanced Imaging Research, Inc.

发明人： Ravi Srinivasan

IPC分类号： G01R33/34 ,  G01R33/341 ,  G01R33/28

摘要： A pediatric magnetic resonance imaging (MRI) system is provided. The pediatric MRI system includes a radio frequency (RF) coil configured to image a portion of a patient. The pediatric MRI system also includes a cryo-cooling mechanism operatively coupled to the RF coil. The cryo-cooling mechanism is configured to maintain a temperature of the RF coil within a prescribed temperature range.

公开(公告)号：US20200275859A1

公开(公告)日：2020-09-03

申请号：US16649781

申请日：2018-09-21

申请人： Advanced Imaging Research, Inc.

发明人： Ravi Srinivasan

IPC分类号： A61B5/055 ,  G01R33/31 ,  G01R33/38 ,  G01R33/3815

摘要： A pediatric magnetic resonance (MRI) system and sub-system are provided. The pediatric MRI system includes a magnet-gradient assembly, an RF shield-body coil assembly and a pediatric MRI sub-system. The pediatric MRI sub-system includes an infant warmer or isolette having a patient section for accommodating a patient. The infant warmer is positionable relative to the magnet-gradient-body coil assembly of the pediatric MRI system. The pediatric MRI sub-system also includes a warming mattress arranged within the patient section of the infant warmer. The infant warming mattress includes an interior space filled at least partially with a host medium and a conduction heating system at least partially arranged in the interior space to conduct heat to the interior space of the infant warming mattress. The pediatric MRI system also includes at least one local radio frequency (RF) coil that is positionable within the patient section of the infant warmer.

公开(公告)号：US07123012B2

公开(公告)日：2006-10-17

申请号：US10722857

申请日：2003-11-26

申请人： Ravi Srinivasan

发明人： Ravi Srinivasan

IPC分类号： G01V3/00

CPC分类号： G01R33/34046 ,  G01R33/3635

摘要： A multi-tune radio frequency (RF) coil for concurrent magnetic resonance imaging (MRI) and magnetic resonance spectroscopy (MRS) is disclosed. The multi-tune RF coil includes a first end ring having a generally annular opening and a first plurality of elongated segments coupled to and positioned circumferentially around the first end ring. The first plurality of elongated segments are azimuthally offset from one another by a substantially equal angular distance. A second RF coil includes a second end ring having a generally annular opening and a second plurality of elongated segments coupled to and positioned circumferentially around the second end ring. The second plurality of elongated segments are azimuthally offset from one another by a substantially equal angular distance. The first and second plurality of elongated segments are coupled to and positioned circumferentially around at least one of an a third end ring having a generally annular opening and an end cap, thereby forming a coil volume, and the first and second plurality of elongated segments lie in a same circumferential plane.

摘要翻译： 公开了用于并行磁共振成像（MRI）和磁共振光谱（MRS）的多调谐射频（RF）线圈。 多调节RF线圈包括具有大致环形的开口的第一端环和耦合到第一端环周围并围绕第一端环定位的第一多个细长段。 第一多个细长段以相等的角距离彼此方位偏移。 第二RF线圈包括具有大致环形开口的第二端环和耦合到第二端环周围并围绕第二端环定位的第二多个细长段。 所述第二多个细长段以相等角度的距离彼此方位偏移。 第一和第二多个细长段联接到周围并围绕具有大致环形开口和端盖的第三端环中的至少一个定位，从而形成线圈体积，并且第一和第二多个细长段位于 在同一圆周平面上。

公开(公告)号：US06992486B2

公开(公告)日：2006-01-31

申请号：US10722760

申请日：2003-11-26

申请人： Ravi Srinivasan

发明人： Ravi Srinivasan

IPC分类号： G01V3/00

CPC分类号： G01R33/34046

摘要： A radio frequency (RF) pediatric coil for magnetic resonance/imaging analysis is disclosed. The coil includes a first end ring having a generally annular opening, and at least one of a second end ring and an end cap. An anterior extension is formed on the first end ring and on the at least one of the second end ring and the end cap. A plurality of elongated segments are coupled to and positioned circumferentially around the first end ring and the at least one of the second end ring and the end cap to form a coil volume. A first elongated segment and a second elongated segment are spaced about the anterior extension to facilitate access into the coil volume. The coil can be implemented as a standalone coil, or it can be operatively coupled to an incubator to increase the resolution of magnetic resonance scans of a neonate inside the incubator.

摘要翻译： 公开了用于磁共振/成像分析的射频（RF）儿科线圈。 线圈包括具有大致环形开口的第一端环和第二端环和端盖中的至少一个。 在第一端环和第二端环和端盖中的至少一个上形成有前延伸部。 多个细长段联接到第一端环和第二端环和端盖中的至少一个周围并且周向地定位以形成线圈体积。 第一细长段和第二细长段围绕前延伸部分间隔开以便于进入线圈体积。 线圈可以实现为独立线圈，或者它可以可操作地耦合到培养箱以增加孵化器内的新生儿的磁共振扫描的分辨率。

公开(公告)号：US06850064B1

公开(公告)日：2005-02-01

申请号：US09721249

申请日：2000-11-22

申请人： Ravi Srinivasan

发明人： Ravi Srinivasan

IPC分类号： G01R33/34 ,  G01V3/00

CPC分类号： G01R33/34046

摘要： An RF coil array is provided with increased S/N over the entire imaging FOV. The array design includes a first RF coil spanning the entire FOV, second and third RF coils which together span the entire FOV such that the entire system provides improved S/N over the imaging FOV. An aspect of the invention is the unusual combination of coils in one integrated structure, that are well isolated from one another and maintain preferred current distributions and mode orientations.

摘要翻译： RF线圈阵列在整个成像FOV上具有增加的S / N。 阵列设计包括跨越整个FOV，第二和第三RF线圈的第一RF线圈，其一起跨越整个FOV，使得整个系统在成像FOV上提供改善的S / N。 本发明的一个方面是在一个集成结构中的线圈的不寻常组合，其彼此完全隔离并保持优选的电流分布和模式取向。

公开(公告)号：US20220381859A1

公开(公告)日：2022-12-01

申请号：US17774518

申请日：2020-11-04

申请人： Advanced Imaging Research, Inc.

发明人： Ravi Srinivasan

IPC分类号： G01R33/3815 ,  G01R33/38 ,  G01R33/385 ,  G01R33/421 ,  G01R33/422 ,  A61B5/00

摘要： An ambulance-compatible magnetic resonance imaging (MRI) system for on-site emergency diagnosis includes a mid-field super-conducting head-only magnet including a bore and an active shield arranged relative to the magnet, a passive shield arranged relative to the magnet, the passive shield including a first flange arranged adjacent to a first side of the magnet bore, a second flange arranged adjacent to a second side of the magnet bore, wherein the first flange and the second flange are electrically connected to each other, and wherein the passive shield is operative to capture flux extending out from the magnet bore and return the flux to the magnet. An asymmetric head gradient assembly for generating magnetic gradient field in the mid-field super-conducting magnet is also provided, the magnetic gradient field being between 100-150 mT/m or having a slew rate between 400-800 T/m/s. The MRI system includes a receiver coil and a controller operatively coupled to the receive coil, the controller configured to produce an image based on data obtained from the receive coil. The MRI system is mountable in an ambulance vehicle.