公开(公告)号：EP0863411A2

公开(公告)日：1998-09-09

申请号：EP98301273.3

申请日：1998-02-20

申请人： PICKER INTERNATIONAL, INC.

发明人： Difilippo, Frank P.

IPC分类号： G01T1/29

CPC分类号： G01T1/1648

摘要： A camera for use in coincidence imaging includes detector heads (10a, 10b) disposed about an examination region (12). The detector heads (10a, 10b) include septa (36) for absorbing radiation having a relatively large axial angle. The septa, however, cause the sensitivity of the detectors (10a, 10b) to vary as a function of axial position along their face. The relative positions of the detectors (10a, 10b) and the patient are varied so as to reduce septal artifacts. In particular, artifacts arising from second and fourth harmonics may be reduced.

摘要翻译： 用于符合成像的相机包括围绕检查区域（12）设置的检测器头（10a，10b）。 检测器头（10a，10b）包括用于吸收具有较大轴向角度的辐射的隔片（36）。 然而，隔垫使得检测器（10a，10b）的灵敏度随着其面部的轴向位置的变化而变化。 检测器（10a，10b）和患者的相对位置是变化的，以便减少隔膜假象。 特别地，可以减少由第二和第四谐波产生的伪影。

公开(公告)号：EP0863410A2

公开(公告)日：1998-09-09

申请号：EP98301287.3

申请日：1998-02-19

申请人： PICKER INTERNATIONAL, INC.

发明人： Difilippo, Frank P. ,  Heller, Mark H.

IPC分类号： G01T1/164

CPC分类号： G01T1/2985 ,  G01T1/172

摘要： A camera for use in coincidence imaging includes detectors (10a, 10b) disposed about an examination region (12). Coincidence logic (]4) determines whether gamma rays are detected by each of the detectors (10a, 10b) occur within a specified time interval. If so, the energy and positions of the detected events are determined. Energy discrimination circuitry (20a, 20b) associated with each detector (10a, 10b) determines if the detected events fall within a specified energy window. A list mode processor (22) generates a list of coincidence events. A rebinning processor (24) rebins the events, and a weight processor (26) weights each coincidence event based on the energy of the detected gamma rays.

摘要翻译： 生成图像包括：（a）检测正电子湮灭事件的特征性γ射线; （b）确定所检测的伽马射线的能量; （c）基于所确定的能量，将正电子湮灭事件分配给至少三个不同权重之一; （d）重复检测，确定和分配多个正电子湮灭事件; 和（e）生成指示加权事件的图像。 还要求保护的是用于产生上述图像的伽马照相机。

公开(公告)号：EP0859240A1

公开(公告)日：1998-08-19

申请号：EP98301108.1

申请日：1998-02-16

申请人： GEC-Marconi Limited

发明人： Young, Ian Robert

IPC分类号： G01R33/38 ,  G01R33/421

CPC分类号： G01R33/381 ,  G01R33/3815 ,  G01R33/421

摘要： In magnetic resonance imaging (MRI) apparatus in which weight considerations and accessibility of the patient result in a magnet 1 with a large bore 2, in order to enable spectroscopy or other activities requiring large magnetic fields to nevertheless be carried out, a small magnet 4 with its own cryostat can be moved from an inoperative position A to an operative B, in which the large magnet acts as a shield winding for the small magnet.

摘要翻译： 在磁共振成像（MRI）装置中，其中重量因素和可接近性导致具有大孔2的磁体1，为了能够进行需要大磁场的光谱学或其它活动，小磁体4 其自身的低温恒温器可以从不工作位置A移动到操作B，其中大磁体用作小磁体的屏蔽绕组。

公开(公告)号：EP0846959A1

公开(公告)日：1998-06-10

申请号：EP97309528.4

申请日：1997-11-26

申请人： GEC-MARCONI LIMITED

发明人： Young, Ian Robert ,  Burl, Michael ,  Tanttu, Jukka I.

IPC分类号： G01R33/34

CPC分类号： G01R33/34084 ,  G01R33/287 ,  G01R33/341

摘要： A radio frequency coil (19) adapted for use in interventional magnetic resonance imaging consists of a loop of an elongated electric conductor arranged to form a twisted wire pair and means associated with it for operating the coil both in transmit and receive mode, in order that the coil does not image anything but tracks its own path on an MR image, without affecting the magnetisation in the main bulk of the body being imaged.

摘要翻译： 适用于介入磁共振成像的射频线圈（19）由布置成形成双绞线对的细长电导线的环和与其相关联的装置以在发射和接收模式下操作线圈，以便 线圈不会对任何东西进行成像，而是在MR图像上追踪其自身的路径，而不影响被成像的身体的主体部分的磁化。

公开(公告)号：EP0845684A1

公开(公告)日：1998-06-03

申请号：EP97309010.3

申请日：1997-11-10

申请人： PICKER INTERNATIONAL, INC.

发明人： Liu, Haiying ,  Bearden, Francis H. ,  Demeester, Gordon D.

IPC分类号： G01R33/561

CPC分类号： G01R33/56554 ,  G01R33/56545

摘要： A transmitter (24) and gradient amplifiers (20) transmit radio frequency excitation and other pulses to induce magnetic resonance in selected magnetic dipoles and cause the magnetic resonance to be focussed into a series of echoes (66) at each of a plurality of preselected echo positions following each excitation. A receiver (38) converts each echo into a data line. Calibration data lines having a close to zero phase-encoding are collected and used to generate correction parameters (102) for each of the echo positions. These parameters include relative echo centre positions (96) and unitary complex correction vectors (106) . The calibration data lines for each of the preselected positions are one-dimensionally Fourier transformed ( 82 ) and multiplied ( 90 ) by the same complex conjugate reference echo (80) . These data lines are then inverse Fourier transformed (92) to generate an auxiliary data array (94) . A relative echo centre position is computed (96) which represents a fractional shift of the true centre relative to the reference echo. A complex sum is computed (104) from the relative echo centre position and normalised (106) to generate a unitary correction vector. The phase-correction parameters are used to phase-correct (116) imaging data lines. The phase-corrected imaging data lines are sorted (122) to build an image plane which is one-dimensionally Fourier transformed (128) in the phase-encoding direction to produce a final corrected image (130) for display on a monitor (134) .

摘要翻译： 发射机（24）和梯度放大器（20）发射射频激励和其它脉冲，以诱发磁共振在选择的磁偶极子，并导致磁共振在每个预选的回波的多个被聚焦成一系列回波（66）的 继位的各激励。 一种接收机（38），转换每个回波到数据线。 具有接近相位编码零校准数据线被收集并用于产生针对每个回波位置的校正参数（102）。 这些参数包括相对于回波中心位置（96）和整体的复杂校正矢量（106）。 对于每个预先选择的位置的校准数据线是由相同的复共轭参考回波（80）转化（82）的一维傅立叶和相乘（90）。 这些数据线然后逆傅里叶变换（92），在辅助数据阵列（94）来生成。 的相对回波中心位置被计算（96）其中darstellt真相对于基准回波中心的部分移位。 复数总和被计算（104）从相对回波中心位置和获救（106），以产生一个单一的校正向量。 相位校正参数用于进行相位正确（116）成像的数据线。 相位校正后的成像数据线排序（122），以建立一个图像平面中的所有其是转化的一维傅立叶（128）中的相位编码方向，以产生在监视器上进行显示的最终校正的图像（130）（134） ，

公开(公告)号：EP0845683A1

公开(公告)日：1998-06-03

申请号：EP97309172.1

申请日：1997-11-14

申请人： PICKER INTERNATIONAL, INC.

发明人： Molyneaux, David A. ,  Braum, William O. ,  Kristoff, James W.

IPC分类号： G01R33/341 ,  G01R33/3415 ,  G01R33/36

CPC分类号： G01R33/341 ,  G01R33/3415

摘要： A multi-mode radio frequency coil (50 1 ) receives resonance signals from a region of interest while allowing arbitrary placement of the coil. A peripheral electrical conductor (62) is divided into four symmetric segments by capacitors (76) , (78) , (80) , (82) . A pair of crossing conductors (64, 66) are connected between 90° offset diagonally opposite portions of the peripheral loop (62) . The crossing conductors include capacitors (68, 70) and are not connected but could include capacitors (68, 70, 86, 88) and be connected at their mid-points. With this configuration, the coil supports orthogonal modes within the plane of the coil and, additionally, a third orthogonal mode (84) perpendicular to the plane of the coil. To image an extended region, a plurality of coils may be overlapped to minimise mutual inductance relative to a first mode. An adjustable capacitor may be connected across one of the coils to adjust mutual inductance relative to the second mode. A pair of half wavelength conductors may be connected diagonally across the coils and be interconnected by an adjustable capacitor for adjusting the third mode.

摘要翻译： 多模式射频线圈（501）从感兴趣的区域接收谐振信号，同时允许线圈的任意放置。 外围电导体（62）通过电容器（76），（78），（80），（82）分成四个对称段。 一对交叉导体（64,66）连接在外围环（62）的90°偏移对角线相对部分之间。 交叉导体包括电容器（68,70）并且不连接，但是可以包括电容器（68,70,86,88）并且在它们的中点连接。 利用这种构造，线圈支撑线圈平面内的正交模式，并且还支持垂直于线圈平面的第三正交模式（84）。 为了对延伸区域进行成像，可以重叠多个线圈以使相对于第一模式的互感最小化。 可调节的电容器可以跨越一个线圈连接，以调节相对于第二模式的互感。 一对半波长导体可以对角地连接在线圈上，并通过可调电容器互连，用于调节第三模式。

公开(公告)号：EP0694149B1

公开(公告)日：1998-06-03

申请号：EP94912025.7

申请日：1994-04-07

申请人： Redring Electric Limited

发明人： Hill, Craig Anthony ,  Carter, Maurice Hugh

IPC分类号： F24C15/10 ,  H05B3/74

CPC分类号： H05B3/746 ,  F24C15/102

摘要： A hob comprises a substantially planar member (1) having apertures defining hotplate regions, a glass-ceramic insert (4) being positioned in each aperture above a radiant heating element (7). The use of a moulded glass insert corresponding to a hotplate regionoffers several advantages over prior art hobs conventionally comprising a glass-ceramic sheet formed by a flat glass process which extends over a plurality of hotplate regions.

公开(公告)号：EP0841575A2

公开(公告)日：1998-05-13

申请号：EP97308477.5

申请日：1997-10-23

申请人： GEC-Marconi Limited

发明人： Gilderdale, David John

IPC分类号： G01R33/34

CPC分类号： G01R33/34084

摘要： A re-usable prostate coil, for use with magnetic resonance imaging to improve the signal to noise ratio, comprises a rigid handle portion by which the coil may be inserted into and withdrawn from an operative position within the patient, and a rigid coil supporting portion integral with the handle portion, a rectangular coil loop being carried by the coil supporting portion and at least a part of the handle portion having a width which is less than that of the rectangular coil loop.

摘要翻译： 用于磁共振成像以改善信噪比的可重新使用的前列腺线圈包括刚性手柄部分，通过该手柄部分可以将线圈插入并从患者体内的操作位置排出线圈，以及刚性线圈支撑部分 与手柄部分成一体，由线圈支撑部分承载的矩形线圈环和手柄部分的至少一部分具有小于矩形线圈环的宽度的宽度。

公开(公告)号：EP0835030A2

公开(公告)日：1998-04-08

申请号：EP97307811.6

申请日：1997-10-02

申请人： GEC-MARCONI LIMITED

发明人： Spencer, Simon Howard

IPC分类号： H04N9/04

CPC分类号： H04N9/045

摘要： A camera producing colour video outputs may employ an image intensifier 5 and a monochrome CCD sensor 3. The scene is exposed through filters F 3 , F 4 which may each contain stripes of subtractive primary colours alternating with clear regions. The video is decoded using waveforms derived from a memory which records the output of the sensor when imaged on, for example, primary colours such as red and blue, producing trains of pulses which identify the spatial regions of each line corresponding to the spatial areas of the pattem on the sensor produced by the colour filters F 3 , F 4 , in order that actual scenes can be decoded using the stored waveforms, for example using sample and hold devices. A colour interference signal is generated in matrix addition circuitry 10 to produce a luminance signal which has stripe visibility removed from it, permitting high resolution video signals to be obtained.

摘要翻译： 产生彩色视频输出的相机可以采用图像增强器5和单色CCD传感器3.该场景通过滤光片F3，F4曝光，滤光片F3和F4可以各自含有与透明区域交替的减色原色的条纹。 使用从存储器导出的波形来解码视频，所述存储器在例如像红色和蓝色这样的原色成像时记录传感器的输出，从而产生一系列脉冲，其识别与空间区域对应的每行的空间区域 由滤色器F3，F4生成的传感器上的图案，以便可以使用所存储的波形来解码实际场景，例如使用采样和保持装置。 在矩阵加法电路10中产生颜色干扰信号，以产生从其中去除条纹可见度的亮度信号，从而允许获得高分辨率视频信号。

公开(公告)号：EP0832609A2

公开(公告)日：1998-04-01

申请号：EP97307554.2

申请日：1997-09-26

申请人： PICKER INTERNATIONAL, INC.

发明人： Barnett, Gene H. ,  Wood, Christopher H. ,  Dayton, Patrick A.

IPC分类号： A61B17/34 ,  A61B19/00 ,  A61B10/00

CPC分类号： A61B17/3403 ,  A61B10/0233 ,  A61B34/20 ,  A61B90/10 ,  A61B90/14 ,  A61B90/39 ,  A61B2017/00725 ,  A61B2034/2055 ,  A61B2034/207 ,  A61B2090/3945

摘要： A position signaling is usable in connection with an image guided surgery system. A plurality of infrared emitters are mounted on a reference object. The reference object is in turn attached to the rocker arm of a head clamp. The head clamp includes a frame and a first head engaging pin secured to one side of the frame. The rocker arm includes two head engaging pins and is movable in relation to the frame. The image guided surgery system uses the signals provided by the infrared emitters to determine and account for movement of the patient's head.

摘要翻译： 位置信号可用于图像引导手术系统。 多个红外发射器安装在参考对象上。 参考对象又连接到头夹的摇臂上。 头夹具包括框架和固定到框架的一侧的第一头部接合销。 摇臂包括两个头接合销，并且可相对于框架移动。 图像引导手术系统使用由红外发射器提供的信号来确定并考虑患者头部的移动。