专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US07409035B2 Phantom for improving coronary calcium scoring consistency 失效
标题翻译：用于改善冠状动脉钙评分一致性的幻影
公开(公告)号：US07409035B2
公开(公告)日：2008-08-05
申请号：US11146668
申请日：2005-06-06
申请人： Leon Kaufman , Joseph W. Carlson
发明人： Leon Kaufman , Joseph W. Carlson
IPC分类号： G01D4/00
CPC分类号： G06F19/321 , A61B6/027 , A61B6/5288 , A61B6/541 , A61B6/583 , G06F19/00 , G06F19/324 , G06K9/40 , G06T5/002 , G06T5/003 , G06T5/10 , G06T5/20 , G06T2207/10081 , G06T2207/20008 , G06T2207/20056 , G06T2207/20192 , G06T2207/30101
摘要： Methods and devices for improving the machine-to-machine and temporal (e.g., inter and intra-machine) and database consistency of coronary calcium scoring by applying a filtering algorithm that sharpens and/or smoothes the image so as to return a filtered image having a spatial resolution of a certain reference value.
摘要翻译：用于通过应用使图像锐化和/或平滑的过滤算法来改善冠状动脉钙评分的机器对机器和时间（例如机内和机器间）和数据库一致性的方法和装置，以便返回具有某个参考值的空间分辨率。

2. 发明授权

US06493572B1 Inherently de-coupled sandwiched solenoidal array coil 有权
标题翻译：固有的去耦合夹层螺线管阵列线圈
公开(公告)号：US06493572B1
公开(公告)日：2002-12-10
申请号：US09408506
申请日：1999-09-30
申请人： Sunyu Su , Leon Kaufman , Mitsuaki Arakawa , Joseph W. Carlson
发明人： Sunyu Su , Leon Kaufman , Mitsuaki Arakawa , Joseph W. Carlson
IPC分类号： A61B5055
CPC分类号： G01R33/3415
摘要： An inherently de-coupled sandwiched solenoidal array coil (SSAC) is disclosed for use in receiving nuclear magnetic resonance (NMR) radio frequency (RF) signals in both horizontal and vertical-field magnetic resonance imaging (MRI) systems. In its most basic configuration, the SSAC comprises two coaxial RF receive coils. The first coil of the array has two solenoidal (or loop) sections that are separated from one another along a common axis. The two sections are electrically connected in series but the conductors in each section are wound in opposite directions so that a current through the coil sets up a magnetic field of opposite polarity in each section. The second coil of the SSAC is disposed (“sandwiched”) between the two separated solenoidal sections of the first coil in a region where the combined opposing magnetic fields cancel to become a null. Due to the winding arrangement and geometrical symmetry, the receive coils of the array become electromagnetically “de-coupled” from one another while still maintaining their sensitivity toward receiving NMR signals. The multiple coil array arrangement also allows for selecting between a larger or smaller field-of-view (FOV) to avoid image fold-over problems without time penalty in image data acquisition. Alternative embodiments are disclosed which include unequal constituent coil diameters, unequal constituent coil windings, non-coaxial coil configurations, a three-coil quadrature detection (QD) SSAC arrangement, multiple SSAC arrangements, and optimized SSAC configurations for breast imaging in both horizontal and vertical-field MRI systems.
摘要翻译：公开了一种固有的去耦合的夹层螺线管阵列线圈（SSAC），用于在水平和垂直场磁共振成像（MRI）系统中接收核磁共振（NMR）射频（RF）信号。在其最基本的配置中，SSAC包括两个同轴RF接收线圈。阵列的第一个线圈具有沿公共轴彼此分离的两个螺线管（或环）部分。两个部分串联电连接，但每个部分中的导体沿相反的方向缠绕，使得通过线圈的电流在每个部分中建立相反极性的磁场。 SSAC的第二线圈在组合的相对磁场取消为零的区域中被布置（“夹持”在第一线圈的两个分离的螺线管部分之间）。由于绕组布置和几何对称性，阵列的接收线圈彼此电磁“去耦合”，同时仍然保持对接收NMR信号的灵敏度。多线圈阵列布置还允许在更大或更小的视场（FOV）之间进行选择，以避免图像折叠问题，而在图像数据采集中没有时间损失。公开了包括不等构成线圈直径，不相等的构成线圈绕组，非同轴线圈配置，三线圈正交检测（QD）SSAC布置，多个SSAC布置以及用于乳腺成像在水平和垂直方向上的优化SSAC配置的替代实施例场MRI系统。

3. 发明授权

US5629624A Switched field magnetic resonance imaging 失效
标题翻译：开关场磁共振成像
公开(公告)号：US5629624A
公开(公告)日：1997-05-13
申请号：US545068
申请日：1990-06-29
申请人： Joseph W. Carlson , Lawrence E. Crooks , Leon Kaufman
发明人： Joseph W. Carlson , Lawrence E. Crooks , Leon Kaufman
IPC分类号： A61B5/055 , G01R33/38 , G01R33/48 , G01R33/56 , G01R33/561 , G01V3/00
CPC分类号： G01R33/445 , G01R33/38 , G01R33/50 , G01R33/56 , G01R33/561 , G01R33/383
摘要： Switched magnetic fields (in addition to the usual pulsed magnetic gradient fields) aiding and/or opposing the usual constant static magnetic field B.sub.o are utilized so as to increase the signal-to-noise ratio for given available imaging sequence times and/or to provide special imaging effects.
摘要翻译：利用与通常的恒定静磁场Bo相辅相和/或相反的开关磁场（除了通常的脉冲磁梯度场），以增加给定的可用成像序列时间的信噪比和/或提供特殊成像效果。

4. 发明授权

US5250901A Open architecture iron core electromagnet for MRI using superconductive winding 失效
标题翻译：使用超导绕组开放架构用于MRI的铁芯电磁铁
公开(公告)号：US5250901A
公开(公告)日：1993-10-05
申请号：US789041
申请日：1991-11-07
申请人： Leon Kaufman , Joseph W. Carlson
发明人： Leon Kaufman , Joseph W. Carlson
IPC分类号： G01R33/38 , G01R33/383 , G01R33/3875 , G01R33/20
CPC分类号： G01R33/383 , G01R33/3806 , G01R33/3875
摘要： A high T.sub.c superconductive electromagnet winding is advantageously employed as part of an MRI magnet structure having a pair of magnetically permeable poles opposingly disposed about the patient imaging volume. The magnetic circuit is otherwise completed by a magnetically permeable yoke structure having plural open apertures for easy access to the patient imaging volume. Still further advantage can be had by asymmetrically disposing a single superconductive electromagnet winding with respect to the patient image volume thereby eliminating the need for more than one cryostat. When high T.sub.c superconductive electromagnetic windings are utilized, a non-conductive composite cryostat may also be used to further reduce spurious eddy current fields. When an asymmetric single high T.sub.c superconductive electromagnet coil is utilized, an asymmetric electromagnet shim winding may also be employed so as to further increase the magnetic field homogeneity within what is now an asymmetrically located patient imaging volume within the air gap of the magnet structure.
摘要翻译：有利地采用高Tc超导电磁铁绕组作为具有相对设置在患者成像体积周围的一对导磁极的MRI磁体结构的一部分。否则，磁路可以通过具有多个开放孔径的磁性可透过的磁轭结构来完成，以容易地接近患者成像体积。可以通过相对于患者图像体积不对称地布置单个超导电磁铁绕组而进一步的优点，从而不需要多于一个的低温恒温器。当使用高Tc超导电磁绕组时，也可以使用非导电复合低温恒温器来进一步减少杂散涡流场。当使用非对称单高Tc超导电磁线圈时，也可以采用非对称电磁铁垫片绕组，以便进一步增加磁体均匀性，现在在磁体结构的气隙内的不对称位置的患者成像体积内。

5. 发明授权

US5227728A Gradient driver control in magnetic resonance imaging 失效
标题翻译：磁共振成像中梯度驱动控制
公开(公告)号：US5227728A
公开(公告)日：1993-07-13
申请号：US786828
申请日：1991-11-01
申请人： Leon Kaufman , Joseph W. Carlson , Richard Gran
发明人： Leon Kaufman , Joseph W. Carlson , Richard Gran
IPC分类号： A61B5/055 , G01R33/12 , G01R33/381 , G01R33/385 , G01R33/389
CPC分类号： G01R33/385 , G01R33/389
摘要： Electromagnet coil driving circuitry in a magnetic resonance imaging system is modified to include a flux-driven closed-loop real-time feedback control. The result is more accurate and efficient control of the net actual gradient flux generated by the coil even in the presence of magnetic circuit materials exhibiting hysteresis effects and/or electrical conductors giving rise to eddy current effects. Such driver control can be used to simultaneously correct the magnetic flux changes induced by environmental, ambient or other outside disturbances affecting the net magnetic field within a patient imaging volume of a magnetic resonance imaging system.
摘要翻译：磁共振成像系统中的电磁线圈驱动电路被修改为包括磁通驱动的闭环实时反馈控制。结果是即使在存在导致涡流效应的磁滞效应的磁路材料和/或电导体的情况下，线圈产生的净实际梯度通量的更精确和有效的控制。可以使用这样的驱动器控制来同时校正由影响磁共振成像系统的患者成像体积内的净磁场的环境，环境或其它外部干扰引起的磁通量变化。

6. 发明授权

US6011393A Self-supporting RF coil for MRI 失效
标题翻译：用于MRI的自支持RF线圈
公开(公告)号：US6011393A
公开(公告)日：2000-01-04
申请号：US883083
申请日：1997-06-26
申请人： Leon Kaufman , Joseph W. Carlson
发明人： Leon Kaufman , Joseph W. Carlson
IPC分类号： G01R33/32 , A61B5/055 , G01R33/34 , G01R33/341
CPC分类号： G01R33/34046
摘要： An RF coil for an MRI system is self-supported by the formed conductor used to make the coil itself. A high-strength, high-conductive, stiff, internally self-supporting Cu-ag alloy may be used.
摘要翻译：用于MRI系统的RF线圈由用于制造线圈本身的成形导体自支撑。可以使用高强度，高导电，刚性，内部自支撑的Cu-Ag合金。

7. 发明授权

US5317297A MRI magnet with robust laminated magnetic circuit member and method of making same 失效
标题翻译：具有坚固的层叠磁路元件的MRI磁体及其制造方法
公开(公告)号：US5317297A
公开(公告)日：1994-05-31
申请号：US141701
申请日：1993-10-26
申请人： Leon Kaufman , Joseph W. Carlson , Shigemasu Okada , Shigeo Hashimoto
发明人： Leon Kaufman , Joseph W. Carlson , Shigemasu Okada , Shigeo Hashimoto
IPC分类号： A61B5/055 , G01R33/20 , G01R33/38 , G01R33/381 , G01R33/383 , G01R33/385 , H01F3/00
CPC分类号： B82Y15/00 , G01R33/383 , G01R33/385
摘要： An MRI magnet member (e.g., a pole piece or tip) is laminated using relatively large bar-shaped laminations instead of the usual thin sheet material. One or more layers of such bar-shaped laminations are arrayed with small insulating gaps into which a low loss insulating liquid filler material is flowed and then cured to a hardened solid state. This simultaneously produces insulated pole tip laminations which have been robustly integrated together into a unitary structure. The resulting robust laminated pole tip is relatively easy to manufacture and is also capable of withstanding rather large magnetic forces and maintaining relatively uniform magnetic field distribution within an MRI imaging region while yet providing providing sufficient eddy current reduction so as to efficiently permit rapidly changing magnetic gradient coil currents to be established.
摘要翻译：使用相对较大的棒状叠片而不是通常的薄片材料层叠MRI磁体构件（例如，极片或尖端）。这种棒状叠片的一层或多层排列有小的绝缘间隙，低损失绝缘液体填充材料流入其中，然后固化至硬化固体状态。这同时产生绝缘极尖叠片，它们已经牢固地集成在一起成为一体的结构。所得到的坚固的层叠极尖相对容易制造，并且还能够承受相当大的磁力并且在MRI成像区域内保持相对均匀的磁场分布，同时还提供足够的涡流减少以便有效地允许快速变化的磁梯度线圈电流要建立。

8. 发明授权

US4897604A Method and apparatus for selective adjustment of RF coil size for magnetic resonance imaging 失效
标题翻译：用于磁共振成像的RF线圈尺寸的选择性调节的方法和装置
公开(公告)号：US4897604A
公开(公告)日：1990-01-30
申请号：US312189
申请日：1989-02-21
申请人： Joseph W. Carlson , Leon Kaufman , Peter A. Rothschild
发明人： Joseph W. Carlson , Leon Kaufman , Peter A. Rothschild
IPC分类号： A61B5/055 , G01R33/34 , G01R33/36
CPC分类号： G01R33/34084 , G01R33/34053 , G01R33/3628
摘要： A bridge conductors for the turns of an MRI RF coil may be connected serially within a connector joint area of an inductive coil so as to selectively increase its physical size (e.g., so as to accommodate larger patient volumes to imaged therewithin). Serial capacitance may be included in at least one of the bridging conductors so as to substantially reduce the net inductive impedance of the added bridge conductors such that the standard coil RF tuning and impedance matching circuits may still operate within their normal predetermined adjustable ranges.

9. 发明授权

US5706575A Method of making eddy current-less pole tips for MRI magnets 失效
标题翻译：制造MRI磁铁无涡流极尖的方法
公开(公告)号：US5706575A
公开(公告)日：1998-01-13
申请号：US700995
申请日：1996-08-21
申请人： Leon Kaufman , Joseph W. Carlson
发明人： Leon Kaufman , Joseph W. Carlson
IPC分类号： G01R33/38 , A61B5/055 , G01R33/383 , G01R33/385 , H01F7/02 , H01F41/02
CPC分类号： G01R33/385 , G01R33/383 , H01F2007/1676 , Y10T29/49075 , Y10T29/49078 , Y10T29/49796
摘要： Static magnet pole tips for a MRI system in which the static magnet pole tips are cut from a slug of spirally wound ferromagnetic material. The static magnet pole tips are cut from the spirally wound slug such that the static magnet pole tips have no or few semi-closed loops of ferromagnetic material. The static magnet pole tips can be used individually, or can be stacked for strength and symmetry.
摘要翻译：用于MRI系统的静磁极尖，其中静磁极尖由螺旋卷绕的铁磁材料的块塞切割。静磁极端头从螺旋缠绕的块塞上切下，使得静磁极端头没有或几乎没有铁磁材料的半闭环。静磁极端头可以单独使用，也可以堆叠成强度和对称性。

10. 发明授权

US5517121A MRI system with side-access to an image volume located within a two-column main magnet 失效
标题翻译： MRI系统具有对位于两列主磁体内的图像体积的侧面访问
公开(公告)号：US5517121A
公开(公告)日：1996-05-14
申请号：US372345
申请日：1995-01-13
申请人： Leon Kaufman , Jianhua Li , Joseph W. Carlson , Bruce C. Breneman
发明人： Leon Kaufman , Jianhua Li , Joseph W. Carlson , Bruce C. Breneman
IPC分类号： G01R33/38 , G01V3/00
CPC分类号： G01R33/3806
摘要： Convenient side access to an image volume located within a two-pole, two-column main magnet of an MRI system is provided by rotating the symmetry axis of the magnet to be non-perpendicular with respect to the longitudinal axis of the patient transport and/or otherwise displacing the two column structures of the magnetic circuit so as to permit open and unobstructed access to the image volume along a direction perpendicular to the longitudinal axis of the patient transport.
摘要翻译：通过使磁体的对称轴相对于患者输送的纵向轴线旋转而不对称地提供位于MRI系统的两极双列主磁体内的图像体积的便利侧进入和/ 或以其它方式移位磁路的两个列结构，以允许沿垂直于患者输送的纵向轴线的方向打开和畅通无阻地访问图像体积。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式