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公开(公告)号：EP1103223A3
公开(公告)日：2001-07-04
申请号：EP00309887.8
申请日：2000-11-07
IPC分类号： A61B10/00
CPC分类号： A61B10/0233 , A61B34/75 , A61B34/76 , A61B90/11 , A61B2017/3405 , A61B2034/742 , A61B2090/376
摘要： A needle biopsy system (10) includes a biopsy needle (210) , and a needle support assembly (200) . The needle support assembly (200) holds the biopsy needle (210) and manipulates the biopsy needle (210) in response to received control signals. A needle simulator having an input device generates the control signals in response to manipulation of the input device by an operator. The operator, in turn, receives feedback from the needle simulator in accordance with forces experienced by the biopsy needle (210) . In a preferred embodiment, the feedback received by the operator includes tactile sensations experienced by the operator as he manipulates the input device. The tactile sensations mimic those the operator would have received had he directly manipulated the biopsy needle (210). Optionally, a curved needle guide is employed to restrict the biopsy needle's progression longitudinally therethrough.
摘要翻译： 针活检系统（10）包括活检针（210）和针支撑组件（200）。 针支撑组件（200）保持活检针（210）并响应于接收到的控制信号操纵活检针（210）。 具有输入装置的针模拟器响应于操作者对输入装置的操纵而产生控制信号。 操作者依次根据活检针（210）所经历的力从针模拟器接收反馈。 在优选实施例中，操作员接收到的反馈包括操作员操纵输入设备时所经历的触觉。 触觉感觉模仿操作者直接操纵活检针（210）时将会接收到的感觉。 可选地，采用弯曲的针引导件来限制活检针纵向地穿过其中。
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公开(公告)号：EP1103223A2
公开(公告)日：2001-05-30
申请号：EP00309887.8
申请日：2000-11-07
IPC分类号： A61B10/00
CPC分类号： A61B10/0233 , A61B34/75 , A61B34/76 , A61B90/11 , A61B2017/3405 , A61B2034/742 , A61B2090/376
摘要： A needle biopsy system (10) includes a biopsy needle (210) , and a needle support assembly (200) . The needle support assembly (200) holds the biopsy needle (210) and manipulates the biopsy needle (210) in response to received control signals. A needle simulator having an input device generates the control signals in response to manipulation of the input device by an operator. The operator, in turn, receives feedback from the needle simulator in accordance with forces experienced by the biopsy needle (210) . In a preferred embodiment, the feedback received by the operator includes tactile sensations experienced by the operator as he manipulates the input device. The tactile sensations mimic those the operator would have received had he directly manipulated the biopsy needle (210). Optionally, a curved needle guide is employed to restrict the biopsy needle's progression longitudinally therethrough.
摘要翻译： 针活检系统（10）包括活检针（210）和针支撑组件（200）。 针支撑组件（200）保持活检针（210）并响应于接收到的控制信号来操纵活检针（210）。 具有输入装置的针模拟器响应于操作者对输入装置的操纵而产生控制信号。 操作者又根据活检针（210）所经受的力从针模拟器接收反馈。 在优选实施例中，由操作者接收的反馈包括操作者在操纵输入装置时经历的触感。 如果他直接操纵活检针（210），触觉就会模仿操作者所接受的感觉。 任选地，使用弯曲的针引导件来纵向地限制活检针的进展。
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公开(公告)号：EP1102080A2
公开(公告)日：2001-05-23
申请号：EP00309902.5
申请日：2000-11-08
IPC分类号： G01R33/385
CPC分类号： G01R33/385
摘要： A gradient coil assembly (22) generates substantially linear gradient magnetic fields through an examination region (14) . The gradient coil assembly (22) includes a pair of primary gradient coil sets (22a, 22b) and a pair of shield coil sets (23a, 23b) which are disposed in an overlapping relationship. One gradient coil set is displaced relative to the other gradient coil set such that the mutual inductance between the two is minimized. Preferably, the coil sets (22a, 22b, 23a, 23b) are asymmetric, such that the sweet spot of each coil is displaced from the geometric centre of each coil. One primary gradient coil set (22a) is a high efficiency, high switching speed coil to enhance performance of ultrafast magnetic resonance sequences, while the second primary gradient coil set (22b) is a low efficiency coil which generates a high quality gradient magnetic field, but with slower switching speeds. By displacing one gradient coil set relative to the other, mutual inductance is minimized, which maximizes peak gradient, rise time, and slew rate, while dB/dt levels are minimized. Arranging asymmetric gradient coil sets in an overlapping, phased array reduces coil resistance, which increases duty cycle and reduces heat dissipation to eliminate extra costs for a cooling system.
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公开(公告)号：EP1096544A1
公开(公告)日：2001-05-02
申请号：EP00309401.8
申请日：2000-10-25
IPC分类号： H01J35/10
CPC分类号： H01J35/101 , H01J2235/1046 , H01J2235/1053 , H01J2235/1208
摘要： An x-ray tube (20) comprising a cathode (23) and an anode (24) in operative relationship with the cathode (23). The anode (24) is mounted on a stem (32). The x-ray tube includes at least one bearing (58) rotatably receiving the stem (32). The at least one bearing (58) has an outer bearing race (66) in an outer race member, an inner bearing race (62) and a plurality of bearing members (64) operatively disposed between the inner and outer bearing races. The x-ray tube (20) also includes an evacuated envelope (78) which encloses the tube components and receives the outer race member of the at least one bearing (58) in thermally conductive contact along an inner surface (79).
摘要翻译： 一种包括阴极（23）和与阴极（23）处于操作关系的阳极（24）的X射线管（20）。 阳极（24）安装在杆（32）上。 X射线管包括至少一个可旋转地接收杆（32）的轴承（58）。 所述至少一个轴承（58）在外座圈构件，内座圈座圈（62）和可操作地设置在内座圈座圈和外座圈座圈之间的多个轴承构件（64）中具有外轴承座圈（66）。 X射线管（20）还包括真空外壳（78），其封闭管部件并容纳沿着内表面（79）导热接触的至少一个轴承（58）的外座圈部件。
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公开(公告)号：EP1000582A3
公开(公告)日：2001-05-02
申请号：EP99308631.3
申请日：1999-10-29
IPC分类号： A61B6/03
CPC分类号： A61B6/583 , A61B6/08 , A61B6/466 , A61B6/547 , A61B2562/0219
摘要： An x-ray source (30) transmits a beam of x-rays through an examination region (E). A receiver (28), in an initial spatial orientation relative to the source (30), receives the beam and generates a view of image data indicative of the intensity of the beam received. A sensor such as an accelerometer detects motion in a selected portion of a mechanical structure (M) supporting the source (30) and the receiver (28). Upon detection of motion, the sensor generates a motion signal. In one embodiment, a first accelerometer (40) is associated with the receiver (28) and a second accelerometer (42) is associated with the source (30). A position calculator mathematically calculates a position of both the source and receiver based on the acceleration data generated by the accelerometers. An image reconstruction processor receives the relative position data, electronically corrects for any misalignment or change in beam travel distance, and reconstructs the views into a volumetric image representation. In another embodiment, a processor compares the detected motion with a database loaded with an empirically determined vibration model. Based on this comparison the processor (110) then generates a cancellation signal, which controls an electromechanical actuator (106) which imparts an offsetting force or motion to the mechanical structure.
摘要翻译： X射线源（30）通过检查区域（E）传输一束x射线。 相对于源（30）处于初始空间取向的接收器（28）接收波束并产生指示所接收的波束的强度的图像数据的视图。 诸如加速度计的传感器检测支撑源（30）和接收器（28）的机械结构（M）的选定部分中的运动。 在检测到运动时，传感器产生运动信号。 在一个实施例中，第一加速度计（40）与接收器（28）相关联，并且第二加速度计（42）与源（30）相关联。 位置计算器基于由加速度计产生的加速度数据，数学地计算源和接收器的位置。 图像重建处理器接收相对位置数据，电子校正光束移动距离中的任何未对准或变化，并将视图重建为体积图像表示。 在另一个实施例中，处理器将检测到的运动与加载有经验确定的振动模型的数据库进行比较。 基于该比较，处理器（110）然后产生消除信号，该消除信号控制向机械结构施加偏移力或运动的机电致动器（106）。
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97.发明公开Apparatus for magnetic resonance imaging and method of designing a gradient coil assembly 有权一种用于磁共振成像和方法，用于梯度线圈结构
公开(公告)号：EP1094330A2
公开(公告)日：2001-04-25
申请号：EP00308446.4
申请日：2000-09-27
IPC分类号： G01R33/385
CPC分类号： G01R33/385
摘要： A gradient coil assembly generates substantially linear magnetic gradients across the central portion of an examination region. The gradient coil assembly includes primary x, y, and z-gradient coils which generate a gradient magnetic field (90) having a non-zero first derivative in and adjacent the examination region. Preferably, the gradient coil assembly includes secondary, shielding x, y, and z coils which generate a magnetic field which substantially cancels, in an area outside a region defined by the shielding coils, a fringe magnetic field generated by the primary gradient coils. The existence of a non-zero first derivative in and adjacent the examination region eliminates aliasing effects attributable to the non-unique gradient field values on either side of a rollover point (82) . The non-unique values of the gradient magnetic field adjacent the rollover point caused structure near the rollover point to overlay each other. The unique non-linearity of the present gradient (90) adjacent the edges expands (magnifies) the image adjacent the edges. Because the expansion is unique, distortions at the edges are readily and accurately mapped back to linear.
摘要翻译： 梯度线圈组件基因率基本上横过检查区域的中央部分线性磁梯度。 梯度线圈组件包括初级的x，y，和z梯度线圈产生哪一个梯度磁场（90），其具有在非零第一衍生物和邻近所述检查区域。 优选地，所述梯度线圈组件包括二次，屏蔽的x，y和z的线圈哪个产生磁场，该磁场基本上消除，在由屏蔽线圈，由主梯度线圈产生的边缘磁场限定的区域以外的区域。 在非零第一衍生物和邻近所述检查区域的存在消除了混叠效应的非唯一梯度场属性的值能够在翻转点（82）的任一侧上。 梯度磁场相邻的翻转点附近的翻转点引起的结构的非唯一值叠加海誓山盟。 本梯度（90）相邻的边缘拓展（放大）图像相邻边缘的独特的非线性。 因为膨胀是唯一的，在边缘处的失真可以容易地和精确地设定映射回线性。
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公开(公告)号：EP1086653A1
公开(公告)日：2001-03-28
申请号：EP00307960.5
申请日：2000-09-14
IPC分类号： A61B6/00
CPC分类号： A61B6/56
摘要： A computerized tomography system includes a stationary section ( A ) and a rotating section electrically linked by at least one interconnecting slip ring ( E ). On one side the slip ring ( E ) is configured as a series of electrically conductive segments separated by non-conductive interruptions. On the other side a like number of transmitters is in selective electrical contact with the conductive segments depending on a position of the rotating frame. Also included is a de-multiplexer which takes image data from the plurality of receivers and rearranges the image data in a determined sequence. Also provided is an angular encoder for providing angular displacement signals to the de-multiplexer for assistance in reconstructing the data channels in the determined sequence.
摘要翻译： 计算机断层摄影系统包括固定部分（A）和由至少一个互连滑环（E）电连接的旋转部分。 一方面，滑环（E）被配置为由非导电中断分开的一系列导电段。 另一方面，根据旋转框架的位置，相同数量的发射器与导电段选择性地电接触。 还包括去多路复用器，其从多个接收器获取图像数据并以确定的顺序重新排列图像数据。 还提供了一种角度编码器，用于向去多路复用器提供角位移信号，以帮助以确定的顺序重构数据信道。
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公开(公告)号：EP1061379A3
公开(公告)日：2001-01-24
申请号：EP00116949.9
申请日：1994-06-03
IPC分类号： G01R33/38 , G01R33/385
CPC分类号： G01R33/34 , G01R33/385 , G01R33/3856 , G01R33/4215 , G01R33/422
摘要： A magnetic resonance imaging machine includes a toroidal vacuum dewer (24) which contains a superconducting magnet (10). A radio frequency coil (32) is mounted within a cylindrical bore (26) of the vacuum dewer. A cylindrical, dielectric former (46) supports an RF shield (34), a z-gradient coil (50), an x-gradient coil (52), and a y-gradient coil (54). The x and y-gradient coils are each composed of four like spiral coil constructions. A metallic layer is cut with cut lines (64) to define a generally spiral coil winding pattern. In a high current density region (68) in which the coil windings are narrower than a preselected width, the cut lines (76) are thinner. In lower current density regions (70), the cut lines (78) are thicker. In lower current density regions, two cut lines are defined between adjacent coil windings such that the coil windings are limited to a maximum width. Conductive islands (80) defined in the lower current density areas which are large enough to support detrimental eddy currents are preferably removed or at least modified such that their ability to support detrimental eddy currents is curtailed.
摘要翻译： 一种磁共振成像机器包括含有超导磁体（10）的环形真空腔（24）。 射频线圈（32）安装在真空吸尘器的圆柱形孔（26）内。 圆柱形电介质成形器（46）支撑RF屏蔽件（34），z梯度线圈（50），x梯度线圈（52）和y梯度线圈（54）。 x和y梯度线圈每个由四个相似的螺旋线圈结构组成。 用切割线（64）切割金属层以限定大致螺旋形的线圈缠绕图案。 在线圈绕组窄于预选宽度的高电流密度区域（68）中，切割线（76）较薄。 在较低的电流密度区域（70）中，切割线（78）较厚。 在较低电流密度区域中，在相邻线圈绕组之间限定两条切割线，使得线圈绕组被限制到最大宽度。 限定在较低电流密度区域中的足够大以支持有害涡流的导电岛（80）优选地被移除或至少被修改，使得其支持有害涡流的能力被削减。
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100.发明公开
公开(公告)号：EP1037066A2
公开(公告)日：2000-09-20
申请号：EP00302109.4
申请日：2000-03-15
IPC分类号： G01R33/561
CPC分类号： G01R33/5615 , G01R33/5618
摘要： The present invention is directed to an MRI apparatus including a main magnet that generates a substantially uniform temporally constant main magnetic field, Bo, through an examination region wherein an object being imaged is positioned. A magnetic gradient generator produces magnetic gradients in the main magnetic field across the examination region. A transmission system includes an RF transmitter that drives an RF coil which is proximate to the examination region. A sequence control manipulates the magnetic gradient generator and the transmission system to produce an MRI pulse sequence. The MRI pulse sequence induces an initial set of contiguous spin echoes (62) and a subsequent set of gradient echoes (64) which stem from the object. A reception system includes a receiver that receives and demodulates the spin and gradient echoes. Ultimately, a reconstruction processor reconstructs an image of the object from data collected via the reception system, and an output device produces a human viewable rendering of the image.
摘要翻译： 本发明涉及一种MRI装置，其包括主磁体，其通过检查区域生成基本上均匀的时间常数的主磁场Bo，其中定位的被摄体被定位。 磁梯度发生器在整个检查区域的主磁场中产生磁梯度。 传输系统包括驱动靠近检查区域的RF线圈的RF发射器。 序列控制操纵磁梯度发生器和传输系统以产生MRI脉冲序列。 MRI脉冲序列引起初始的一组连续的自旋回波（62）和源自物体的随后的一组梯度回波（64）。 接收系统包括接收和解调自旋和梯度回波的接收机。 最终，重建处理器通过接收系统收集的数据来重建对象的图像，并且输出装置产生图像的人可见的渲染。
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