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公开(公告)号：US20080197846A1
公开(公告)日：2008-08-21
申请号：US12066269
申请日：2006-09-08
申请人： Romhild Martijn Hoogeveen , Jan Frans Lodewijk De Becker , Peter Boernert , Johannes Adrianus Overweg
发明人： Romhild Martijn Hoogeveen , Jan Frans Lodewijk De Becker , Peter Boernert , Johannes Adrianus Overweg
IPC分类号： G01R33/54
CPC分类号： G01R33/561
摘要： A magnetic resonance imaging system comprises a signal acquisition system to acquire magnetic resonance signals. A reconstructor reconstructs magnetic resonance images from the acquired magnetic resonance signals. The signal acquisition system and/or the reconstructor are controlled to perform overhead activities separately from actual acquisition of the magnetic resonance signals notably for different contrast types. Accordingly, time efficient signal acquisition for multiple contrasts is achieved.
摘要翻译： 磁共振成像系统包括用于获取磁共振信号的信号采集系统。 重构器从获取的磁共振信号重建磁共振图像。 控制信号采集系统和/或重构器以独立于实际获取磁共振信号以独特地对于不同对比度类型进行开销活动。 因此，实现了多个对比度的时间有效的信号采集。
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22.发明授权Vertical field type MRI apparatus with a conical cavity situated in the main magnet 失效垂直场型MRI装置，其具有位于主磁体中的锥形腔公开(公告)号：US06741078B2
公开(公告)日：2004-05-25
申请号：US09962297
申请日：2001-09-25
IPC分类号： G01V300
CPC分类号： G01R33/3806 , G01R33/3815
摘要： The invention relates to a vertical field type MRI apparatus provided with a superconducting coil system 20a, 20b for generating a substantially homogeneous magnetic field in an imaging volume 18 of the apparatus. The coil system includes a circular outer coil 28 and a supplementary coil 30 which is positioned in the same plane 32 as and within the outer coil, which coils conduct opposite currents. The ratio Da/Do of the diameter Da of the supplementary coil to the diameter Do of the outer coil lies between 0,7 and 0,9. Further coils 34 to 38, 40 to 46 for making the field even more homogeneous are preferably located on a conical surface 48, 50 within the first mentioned coils 28, 30 in such a manner that a recess is formed in which a conically shaped gradient coil system 52 can be accommodated, with the result that the expensive outer coil 28 and the supplementary coil 30 can be arranged at an as short as possible distance from the space for receiving the patient to be examined.
摘要翻译： 本发明涉及一种具有超导线圈系统20a，20b的垂直场型MRI设备，用于在该装置的成像体积18中产生基本均匀的磁场。 线圈系统包括圆形的外部线圈28和辅助线圈30，辅助线圈30位于与外部线圈内部和外部线圈中相同的平面32中，该线圈传导相反的电流。 辅助线圈的直径Da与外部线圈的直径Do的比Da / Do在0,7和0,9之间。 用于使场更均匀的另外的线圈34至38,40至46优选地位于第一提及的线圈28,30内的锥形表面48,50上，使得形成凹部，其中形成锥形梯度线圈 可以容纳系统52，结果是昂贵的外部线圈28和辅助线圈30可以布置在与用于接收待检查的患者的空间尽可能短的距离处。
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23.发明授权Vertical field type MRI apparatus with a conical gradient coil situated in the main magnet 失效垂直场型MRI装置，其具有位于主磁体中的锥形梯度线圈公开(公告)号：US06618606B2
公开(公告)日：2003-09-09
申请号：US09962654
申请日：2001-09-25
IPC分类号： A61B5055
CPC分类号： G01R33/3806 , G01R33/3815
摘要： A vertical field type MRI apparatus is provided with a superconducting coil system for generating a substantially homogeneous magnetic field in an imaging volume of the apparatus. The coil system includes a circular outer coil and a supplementary coil which is positioned in the same plane as and within the outer coil, which coils conduct opposite currents. The ratio Da/Do of the diameter Da of the supplementary coil to the diameter Do of the outer coil lies between 0.7 and 0.9. Further coils for making the field more homogeneous are preferably located on a conical surface within the circular outer coil and supplementary coil in such a manner that a recess is formed in which a conically shaped gradient coil system can be accommodated, with the result that the expensive outer coil and the supplementary coil can be arranged at an as short as possible distance from the space for receiving the patient to be examined.
摘要翻译： 垂直场型MRI装置设置有超导线圈系统，用于在装置的成像体积中产生基本均匀的磁场。 线圈系统包括圆形的外部线圈和辅助线圈，该线圈与外部线圈位于同一平面内，该线圈导致相反的电流。 辅助线圈的直径Da与外部线圈的直径Do的比Da / Do在0.7和0.9之间。 用于使场更均匀的更多线圈优选地位于圆形外线圈和辅助线圈内的锥形表面上，使得形成凹槽，其中可容纳锥形梯度线圈系统，结果是昂贵的 外线圈和辅助线圈可以布置在与用于接收待检查患者的空间尽可能短的距离处。
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公开(公告)号：US09606206B2
公开(公告)日：2017-03-28
申请号：US12997020
申请日：2009-06-16
CPC分类号： G01R33/4808 , A61B5/055 , A61N5/1038 , A61N5/1049 , A61N5/1067 , A61N2005/1055 , G01R33/56 , G01R33/5608 , G01R33/5611
摘要： A radiation therapy system comprises: a radiation therapy subsystem (20, 22, 32) configured to perform radiation therapy by applying radiation pulses to a region of a subject at pulse intervals (Tpi); a magnetic resonance (MR) imaging subsystem (10, 16, 30, 36) configured to acquire a dataset of MR imaging data samples from the region of the subject over one or more MR sampling intervals (TAQ) that are longer than the pulse intervals, the one or more MR sampling intervals overlapping at least some of the pulse intervals; a synchronizer (40) configured to identify MR imaging data samples of the dataset whose acquisition times overlap pulse intervals; and a reconstruction processor (44) configured to reconstruct the dataset without the measured values for the MR imaging data samples identified as having acquisition times overlapping pulse intervals to generate a reconstructed MR image.
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公开(公告)号：US09274192B2
公开(公告)日：2016-03-01
申请号：US13696127
申请日：2011-05-13
IPC分类号： G01V3/00 , G01R33/385 , G01R33/421
CPC分类号： G01R33/385 , G01R33/3854 , G01R33/4215
摘要： A magnetic resonance imaging magnet assembly (100) comprising: —a magnet (102) adapted for generating a main magnetic field for aligning the magnetic spins of nuclei of a subject (502) located within an imaging volume (504); and —a gradient coil (103) for generating a gradient magnetic field for spatial encoding of the magnetic resonance signal of spins of nuclei within the imaging volume, wherein the gradient coil is adapted to be mounted into the magnet, wherein the gradient coil comprises: —a first gradient coil section (112), wherein the first gradient coil section comprises a first rigid element (113), —a second gradient coil section (114), wherein the second gradient coil section also comprises a second rigid element (115), —a connecting element (116, 300, 302, 304, 400) for joining the two half gradient coils, wherein the connecting element comprises an elastic material (116), wherein the elastic material is in contact with the first rigid element and the second rigid element.
摘要翻译： 一种磁共振成像磁体组件（100），包括： - 磁体（102），适于产生主磁场，用于对准位于成像体积（504）内的对象（502）的核的磁旋转; 和梯度线圈（103），用于产生用于空间编码成像体积内的核心的磁共振信号的梯度磁场，其中所述梯度线圈适于安装到所述磁体中，其中所述梯度线圈包括： - 第一梯度线圈段（112），其中所述第一梯度线圈段包括第一刚性元件（113），第二梯度线圈段（114），其中所述第二梯形线圈段还包括第二刚性元件（115） ， - 用于连接所述两个半梯度线圈的连接元件（116,300,302,304,400），其中所述连接元件包括弹性材料（116），其中所述弹性材料与所述第一刚性元件接触，并且所述连接元件 第二刚性元件。
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26.发明授权公开(公告)号：US09188654B2
公开(公告)日：2015-11-17
申请号：US13496208
申请日：2010-09-16
CPC分类号： A61N5/1071 , A61N5/1031 , A61N5/1039 , A61N5/1049 , A61N2005/1055 , A61N2005/1058 , G01R33/3806 , G01R33/381 , G01R33/4808 , G01R33/5601
摘要： A combined magnetic resonance (MR) and radiation therapy system (10) includes a bore-type magnet (12) with a magnet radiation translucent region (16) which allows radiation beams to travel radially through the magnet and a split-type gradient coil (18) includes a gradient coil radiation translucent region (20) aligned to the magnet radiation translucent region (16). A radiation source (24), disposed laterally to the magnet, administers a radiation dose through the magnet and gradient coil radiation translucent regions (16, 20) to an examination region (14). A dosage unit (66) determines the actual radiation dose delivered to each voxel of a target volume (30) and at least one non-target volume based on a pre-treatment, intra-treatment, and/or post-treatment image representation of the target volume (30) and the at least one non-target volume. A planning processor (60) updates at least one remaining radiation dose of a radiation therapy plan based on the determined actual radiation dose.
摘要翻译： 组合磁共振（MR）和放射治疗系统（10）包括具有磁体辐射半透明区域（16）的孔型磁体（12），其允许辐射束径向穿过磁体和分离式梯度线圈 18）包括与磁体辐射半透明区域（16）对准的梯度线圈辐射半透明区域（20）。 辐射源（24）横向设置在磁体上，通过磁体和梯度线圈辐射半透明区域（16,20）将辐射剂量施加到检查区域（14）。 剂量单元（66）基于预处理，治疗前和/或后处理图像表示来确定递送到目标体积（30）的每个体素的实际辐射剂量和至少一个非目标体积 目标体积（30）和至少一个非目标体积。 计划处理器（60）基于所确定的实际辐射剂量更新辐射治疗计划的至少一个剩余辐射剂量。
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公开(公告)号：US08134368B2
公开(公告)日：2012-03-13
申请号：US12513188
申请日：2007-11-05
IPC分类号： G01V3/00
CPC分类号： G01R33/3815 , G01R33/288 , H01F6/02
摘要： The present invention relates to a magnetic resonance examination system (10) and to a method of operating such a magnetic resonance examination system (10). In particular the present invention relates to a magnetic resonance examination system (10) comprising a superconducting main magnet (20) surrounding an examination region (18) and generating a main magnetic field in the examination region (18), and further comprising a magnetic field gradient system (30) selectively causing alternating gradient magnetic fields in the examination region (18), said magnetic field gradient system (30) being coupled to the main magnet (20). In order to provide a technique to reliably detect a quench of the superconducting main magnet (20) of such a magnetic resonance examination system (10) a detecting device (91) is suggested for detecting an emerging quench of the main magnet (20), said detecting device (91) being adapted to operate in different modes depending on the mode of operation of the magnetic resonance examination system (e.g. ramp-up, ramp-down or continuous operation).
摘要翻译： 本发明涉及磁共振检查系统（10）以及操作这种磁共振检查系统（10）的方法。 特别地，本发明涉及一种磁共振检查系统（10），其包括围绕检查区域（18）并在检查区域（18）中产生主磁场的超导主磁体（20），并且还包括磁场 梯度系统（30）选择性地在检查区域（18）中引起交变梯度磁场，所述磁场梯度系统（30）耦合到主磁体（20）。 为了提供可靠地检测这种磁共振检查系统（10）的超导主磁体（20）的淬火的技术，建议检测装置（91）用于检测主磁体（20）的出现的淬火， 所述检测装置（91）适于根据磁共振检查系统的操作模式（例如，上升，下降或连续操作）以不同的模式操作。
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公开(公告)号：US20110230754A1
公开(公告)日：2011-09-22
申请号：US13131476
申请日：2009-11-19
CPC分类号： A61N5/1049 , A61N5/1037 , A61N5/1038 , A61N2005/1055 , A61N2005/1087
摘要： A therapeutic apparatus comprising: a magnetic resonance imaging system adapted for acquiring a set of magnetic resonance imaging data in an imaging zone, wherein the magnetic resonance imaging system comprises a means for generating a magnetic field, a guiding means adapted for guiding a beam of charged particles to a target zone within a subject such that the beam encloses an angle with the magnetic field lines of the magnetic field within the imaging zone, the angle being between 0 degrees and 30 degrees, wherein the imaging zone comprises the target zone, a zone determination means for determining the location of the target zone within the subject using the set of magnetic resonance imaging data.
摘要翻译： 一种治疗装置，包括：磁共振成像系统，其适于在成像区域中获取一组磁共振成像数据，其中所述磁共振成像系统包括用于产生磁场的装置，适于引导带电束的引导装置 颗粒到受试者内的目标区域，使得束与成像区域内的磁场的磁场线包围一角度，角度在0度和30度之间，其中成像区域包括目标区域，区域 确定装置，用于使用所述一组磁共振成像数据确定所述对象内的所述目标区域的位置。
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公开(公告)号：US07263839B2
公开(公告)日：2007-09-04
申请号：US10531348
申请日：2003-09-18
CPC分类号： F25D29/001 , F25B45/00 , F25B2345/001 , F25B2345/002 , F25B2345/003
摘要： The invention relates to a cooling method for cooling a superconducting coil assembly in a MR apparatus, wherein the superconducting coil assembly 10 is cooled using a cooling agent 41, 42 which is in thermal contact with the superconducting coil assembly in a cooling chamber 20, the cooling agent being cooled by a refrigerator 50. The method comprises the steps of transferring (S2) cooling agent from the cooling chamber to a cooling agent storage when a predetermined temperature is exceeded in at least a part of the cooling agent in the cooling chamber, and returning (S4) cooling agent from the cooling agent storage to the cooling chamber when the temperature of at least a part of the cooling agent in the cooling chamber is equal to or less than the predetermined temperature. The invention also relates to a cooling device for performing the cooling method and to an MR apparatus with such a cooling device.
摘要翻译： 本发明涉及用于冷却MR设备中的超导线圈组件的冷却方法，其中超导线圈组件10使用在冷却室20中与超导线圈组件热接触的冷却剂41,42来冷却， 冷却剂被冷藏库50冷却。 该方法包括以下步骤：在冷却室中的冷却剂的至少一部分超过预定温度时将（S 2）冷却剂从冷却室转移到冷却剂储存器，并且返回（S 4）冷却剂 当冷却室中的至少一部分冷却剂的温度等于或小于预定温度时，从冷却剂储存器到冷却室。 本发明还涉及一种用于执行冷却方法的冷却装置和具有这种冷却装置的MR装置。
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公开(公告)号：US07193416B2
公开(公告)日：2007-03-20
申请号：US10498198
申请日：2002-11-20
申请人： Paul Royston Harvey , Johannes Adrianus Overweg , Cornelis Leonardus Gerardus Ham , Nicolaas Bernardus Roozen , Patrick Willem Paul Limpens
发明人： Paul Royston Harvey , Johannes Adrianus Overweg , Cornelis Leonardus Gerardus Ham , Nicolaas Bernardus Roozen , Patrick Willem Paul Limpens
IPC分类号： G01V3/00
CPC分类号： G01R33/3806 , G01R33/385 , G01R33/3856
摘要： The invention relates to an open magnetic resonance imaging (MRI) magnet system (1) for use in a medical imaging system. The open MRI magnet system has two main coil units which are accomodated, at some distance from each other, in a first housing (2) and in a second housing (3), respectively. Between the two housings, an imaging volume (6) is present wherein a patient to be examined is placed. A gradient coil unit (9, 10) facing the imaging volume is present near a side of each of the two housings. Functional connections of the gradient coil units (9, 10), such as electrical power supply lines (13, 14) and cooling channels (15, 16) are provided in a central passage (4, 5) which is present in each of the two housings. As a result, these functional connections do not reduce the space in the imaging volume available for the patient. The central passages and the electrical power supply lines provided therein are parallel to the direction of the main magnetic field of the open MRI magnet system, so that the Lorentz forces exerted on the power lines are limited.
摘要翻译： 本发明涉及用于医学成像系统的开放磁共振成像（MRI）磁体系统（1）。 开放MRI磁体系统具有分别在第一壳体（2）和第二壳体（3）中彼此相隔一定距离的两个主线圈单元。 在两个壳体之间，存在成像体积（6），其中放置待检查的患者。 面对成像体积的梯度线圈单元（9,10）存在于两个壳体中的每一个的侧面附近。 梯形线圈单元（9,10）的功能连接，例如电力供应线（13,14）和冷却通道（15,16）设置在中央通道（4,5）中，中心通道（4,5）存在于 两个外壳。 因此，这些功能连接不会减少可用于患者的成像体积的空间。 设置在其中的中央通道和电源线平行于开放式MRI磁体系统的主磁场的方向，使得施加在电力线上的洛伦兹力受到限制。
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