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1. 发明授权

US06218838B1 MRI magnet with high homogeneity, patient access, and low forces on the driver coils 失效
标题翻译： MRI磁铁具有高均匀性，病人进入和驱动线圈上的低力
公开(公告)号：US06218838B1
公开(公告)日：2001-04-17
申请号：US09141708
申请日：1998-08-28
申请人： John V. M. McGinley , Ian R. Young , Gordon D. DeMeester , Ilmari Kinanen
发明人： John V. M. McGinley , Ian R. Young , Gordon D. DeMeester , Ilmari Kinanen
IPC分类号： G01V300
CPC分类号： G01R33/383 , G01R33/3873
摘要： A pair of annular magnets (10) generate a vertical magnetic flux field through an imaging volume (12). The flux is focused by a pair of Rose rings (26) of high cobalt steel. A high order shim set includes a plurality of permanently magnetized or magnetized iron rings (32a, 32b, 32c, 32d) which cooperatively interact with the magnet assembly to optimize the homogeneity of the magnetic flux through the imaging volume. One of the permanent magnetic rings (32d), is mounted with an opposite polarity relative to the others. The magnetized rings are mounted in a non-ferrous, electrically insulating support structure (34) such that gradient coils (50) can be positioned behind the permanent magnet rings. A flux return path (14, 16, 18, 20, 22, 24) provides a low flux resistant path from adjacent the Rose ring at one side of the imaging volume remotely around the imaging volume to a position adjacent the Rose ring at the other side of the imaging volume.
摘要翻译：一对环形磁体（10）通过成像体积（12）产生垂直磁通场。焊剂通过一对高钴钢的玫瑰环（26）聚焦。高阶垫片包括多个永久磁化或磁化的铁环（32a，32b，32c，32d），其与磁体组件协作地相互作用以优化通过成像体积的磁通量的均匀性。永久磁环（32d）中的一个相对于其它永久磁环安装有相反的极性。磁化环安装在有铁，电绝缘的支撑结构（34）中，使得梯度线圈（50）可以位于永磁体环的后面。磁通返回路径（14,16,18,20,22,24）在成像体积的远侧围绕成像体积的一侧的玫瑰环附近提供低通量阻力路径到位于另一侧的玫瑰环附近的位置一侧的成像体积。

2. 发明授权

US06335670B1 Mri system with split rose ring with high homogeneity 失效
标题翻译：具有高均匀性的分裂玫瑰环的Mri系统
公开(公告)号：US06335670B1
公开(公告)日：2002-01-01
申请号：US09549852
申请日：2000-04-14
申请人： Ilmari Kinanen
发明人： Ilmari Kinanen
IPC分类号： H01F100
CPC分类号： G01R33/3815
摘要： A pair of pole assemblies (12, 14) are disposed on opposite sides of an examination region (10). A ferrous flux return path includes an overhead ferrous structure (18) above the upper pole assembly and a lower ferrous structure (20) adjacent to the lower pole assembly. The pole assemblies include a Rose ring assembly (34) having axially spaced segments (40, 42) with an axial gap (44) in between. Magnetic attractive forces between an annular magnet (30) and the Rose ring urge the Rose ring and the magnet into an axially centered alignment. The magnet of the upper pole piece assembly (12) is attracted toward the overhead ferrous structure (18) and toward the lower pole piece assembly (14), as well as toward the Rose ring. The magnet is also positioned such that the magnetic attractive forces between the magnet and the Rose ring dominate magnetic attractive forces between the overhead ferrous structure and the magnet. In this manner, the magnet is subject to a net force toward an axially balanced position, such that the force does not change sign during ramp up and ramp down.
摘要翻译：一对杆组件（12,14）设置在检查区域（10）的相对侧上。含铁通量返回路径包括在上极组件上方的架空铁结构（18）和与下极组件相邻的较低铁结构（20）。极组件包括具有在其间具有轴向间隙（44）的轴向间隔开的节段（40,42）的玫瑰环组件（34）。环形磁体（30）和玫瑰环之间的吸引力将玫瑰环和磁体推向轴向居中对齐。上极片组件（12）的磁体被吸引到架空铁结构（18）并且朝着下极靴组件（14）以及朝向玫瑰环的方向被吸引。磁体也被定位成使得磁体和玫瑰环之间的磁吸引力主导着架空铁结构和磁体之间的磁力吸引力。以这种方式，磁体受到朝向轴向平衡位置的净力，使得该力在斜坡上升和下降期间不改变符号。

3. 发明授权

US5329128A Method and apparatus for recording information from a slidable sheet of a rim cassette 失效
标题翻译：用于从轮辋盒的可滑动片材记录信息的方法和装置
公开(公告)号：US5329128A
公开(公告)日：1994-07-12
申请号：US965414
申请日：1992-12-29
申请人： Ilmari Kinanen , Matti Rantanen , Pertti Sormunen
发明人： Ilmari Kinanen , Matti Rantanen , Pertti Sormunen
IPC分类号： G03B42/02 , G03B42/04
CPC分类号： G03B42/02
摘要： A method and apparatus for recording the information from the slidable sheet (5) of a RIM cassette (2). The information included on the sheet, used especially in X-ray photography, is read from the sheet surface drawn out of the cassette with the aid of a laser beam focused on it, after which the sheet is emptied of information with the aid of a powerful light and returned to the cassette. According to the invention, the reading is effected during the linear withdrawal of the slidable sheet (5) in the reading position (9) past which the sheet surface including the information is guided, and the removal of the information is effected during the linear return travel of the slidable sheet in the emptying position (10) past which the sheet surface travels while the sheet is being pushed back into the cassette (2). The movement of the slidable sheet (5) can be effected by a pulling device which consists of a slide (8) travelling on a rotatable shaft (7) and the movement of the slide is effected with the aid of ball bearings mounted against the shaft at a pitch angle. The reciprocating path of the slide (8) is preferably adjusted so that the slidable sheet (5) comes only partially out of the cassette (2) which thus continuously acts as a guide for the sheet.
摘要翻译： PCT No.PCT / FI91 / 00230 Sec。 371日期1992年12月29日 102（e）日期1992年12月29日PCT提交1991年7月29日PCT公布。出版物WO92 / 02849 日期1992年2月20日。一种用于记录来自RIM盒（2）的滑动片（5）的信息的方法和装置。借助于聚焦在其上的激光束从纸盒中拉出的片材表面读取特别用于X射线摄影的片材上的信息，之后借助于强光并返回盒式磁带。根据本发明，在可滑动片材（5）在包括信息的片材表面的读取位置（9）中的线性抽出期间进行读取，并且在线性返回期间实现信息的移除当片材被推回到盒（2）中时，片状表面行进的空置位置（10）中的滑动片的行程。可滑动片材（5）的运动可以通过牵引装置来实现，牵引装置由在可旋转轴（7）上行进的滑动件（8）组成，并且滑块的运动借助于安装在轴上的球轴承以桨距角。优选地调节滑动件（8）的往复运动路径，使得可滑动片材（5）仅部分地离开盒子（2），从而连续地用作片材的导向件。

4. 发明授权

US5296811A Magnetic resonance imaging apparatus and method 失效
标题翻译：磁共振成像装置及方法
公开(公告)号：US5296811A
公开(公告)日：1994-03-22
申请号：US970805
申请日：1992-11-03
申请人： Gosta J. Ehnholm , Ilmari Kinanen , Raimo Sepponen
发明人： Gosta J. Ehnholm , Ilmari Kinanen , Raimo Sepponen
IPC分类号： G01R33/28 , G01R33/383 , G01V3/00
CPC分类号： G01R33/383 , G01R33/28
摘要： The invention relates to a novel magnetic resonance imaging apparatus. The nuclei, protons or the paramagnetic electrons of an imaged object are cyclically polarized during a period of about one second with a permanent magnet which is then quickly shifted away from the imaged object in a permanent magnet carrier tube, so that the field of the permanent magnet would not have an interfering effect on the immediately following signal-collection for MRI-imaging. The permanent magnet can be manipulated or shifted back and forth in the tube either magnetically, pneumatically, hydraulically or mechanically. The apparatus also includes another permanent magnet or a resistive magnet coil couple, which is located in the tube near the opposite end of the tube, and which generates a homogeneous magnetic field within the imaged area. The apparatus includes a gradient coil system for generating a time-dependent magnetic field gradient necessary for imaging, as well as a coil system for producing an electromagnetic radio-frequency excitation signal to be linked with the nuclei or paramagnetic electrons of an imaged object as well as for registering the response of the nuclei or electrons to said signal. A control unit is used to control the above coils and to receive the information therefrom for producing an image or some other representation thereof.
摘要翻译：本发明涉及一种新型的磁共振成像装置。成像对象的核，质子或顺磁性电子在大约一秒钟的周期内被周期性地极化，永久磁铁在永磁体载体管中迅速地从成像对象中移开，从而永久磁场磁体对于立即跟踪的MRI成像信号收集不会产生干扰。永久磁铁可以在磁力，气动，液压或机械上在管中进行操纵或前后移动。该装置还包括另一个永磁体或电阻性磁体线圈对，其位于管的相对端附近的管中，并且在成像区域内产生均匀的磁场。该装置包括用于产生成像所需的时间依赖磁场梯度的梯度线圈系统，以及用于产生要与成像对象的核或顺磁性电子连接的电磁射频激励信号的线圈系统用于记录核或电子对所述信号的响应。控制单元用于控制上述线圈并从其接收信息以产生图像或其他一些表示。

5. 发明授权

US5157264A Support for sliding radiographic plate in a magazine 失效
标题翻译：支持杂志中的滑动放射照相板
公开(公告)号：US5157264A
公开(公告)日：1992-10-20
申请号：US737778
申请日：1991-07-30
申请人： Ilmari Kinanen , Matti Rantanen , Pertti Sormunen
发明人： Ilmari Kinanen , Matti Rantanen , Pertti Sormunen
IPC分类号： G03B42/04
CPC分类号： G03B42/04
摘要： The invention relates to a supporting system of a sliding plate of a magazine comprising a magazine case and a sliding plate which travels in a linear direction inside the magazine case. The system is comprised of a guide bar that is secured to the lower cover of the magazine, parallel to the longitudinal axis of the lower cover. The sliding plate rests upon the guide bar and upon support screws arranged on the end part of the magazine case against the front portion of the sliding plate.
摘要翻译：本发明涉及一种弹匣滑动板的支撑系统，包括一个弹匣盒和一个沿着线性方向行进在弹匣盒内的滑板。该系统包括一个导向杆，该导向杆固定到料仓的下盖，平行于下盖的纵向轴线。滑动板支撑在导向杆上，并且在支撑螺钉上布置在弹匣盒的端部上抵靠滑板的前部。

6. 发明授权

US4757968A Apparatus for implementation of vertical movement of a chair, especially of a patient chair 失效
标题翻译：用于实现椅子，特别是患者椅子的椅子的垂直运动的装置
公开(公告)号：US4757968A
公开(公告)日：1988-07-19
申请号：US13053
申请日：1987-02-10
申请人： Ilmari Kinanen , Matti Smalen
发明人： Ilmari Kinanen , Matti Smalen
IPC分类号： A61G15/06 , A47C3/24 , A61B6/04 , A61B6/14 , A61G9/00 , A61G15/02 , F16M11/00
CPC分类号： A61B6/0457 , A47C3/24 , A61B6/14 , A61G15/02
摘要： An apparatus for the implementation of a vertical movement for a chair, especially a patient chair is disclosed. This apparatus comprises a lift column (1) with an upper end suitable for mounting a chair, a tubular shell construction (2) against which the lift column (1) is telescopically supported, a threaded member (5) whose rotation enables elevation and lowering of the lift column (1), and a motor (4) for rotating the threaded member (5). In the apparatus according the lift column (1) has a polygonal cross section, and it receives for each of its sides a support incorporating a spring action and sliding bearing contact by support braces (3) mounted to the inner surface of the shell construction (2). The apparatus achieves a vibration-free lift movement.
摘要翻译：公开了一种用于实现椅子，特别是患者椅子的垂直运动的装置。该装置包括具有适于安装椅子的上端的提升塔（1），提升塔（1）可伸缩地支撑着的管状壳体结构（2），旋转的螺纹构件（5）能够升高和降低的升降塔（1）和用于使螺纹构件（5）旋转的马达（4）。在升降塔（1）的装置中具有多边形横截面，并且每个侧面都容纳安装在壳结构的内表面上的支撑支架（3）并入弹簧作用和滑动轴承接触的支承件（ 2）。该装置实现无振动升降运动。

7. 发明授权

US4481650A Installation for producing radiographic layer images 失效
标题翻译：安装用于生产射线照相图像
公开(公告)号：US4481650A
公开(公告)日：1984-11-06
申请号：US370615
申请日：1982-04-22
申请人： Ilmari Kinanen
发明人： Ilmari Kinanen
IPC分类号： A61B6/03 , A61B6/14 , G03B41/16
CPC分类号： A61B6/032 , A61B6/14
摘要： The purpose of the invention is to create a mechanically uncomplicated installation for producing radiographic layer images, making it possible to use small radiation dosages and, however, to collect sufficiently information on the object by one exposure, whereby separation of the superimposed layers from each other in a desired way for visualization can be accomplished by means of tomosynthesis. The installation includes radiation generating means (1, 2), collimating means for confining the radiation and focusing it on an object (4) to be radiographed, e.g. a patient, means (10) for detecting the radiation passed through the object and means for storing and processing the information contained in said detection. Said collimating means comprise a collimation unit (3) including at least two separate, narrow, contiguous, substantially parallel collimating slots (5) for producing narrow, fan-shaped beams, said slots being arranged preferably in alignment with the longitudinal axis of the object to be radiographed. The installation also includes means (11, 13) for displacing said collimating slots and the object to be radiographed in relation to each other at least substantially in alignment with the normal of said collimating slots, those parts of the object selected to be radiographed being arranged to be exposed to radiation by said narrow fan-shaped beams from a number of different directions. The information obtained from the object to be radiographed is stored preferably in digital form and processed for visualization.
摘要翻译：本发明的目的是创建一种用于产生射线照相层图像的机械简单安装，使得可以使用小的辐射剂量，然而，通过一次曝光来收集物体上的足够信息，由此叠加的层彼此分离以期望的可视化方式可以通过断层合成来实现。该装置包括辐射发生装置（1,2），准直装置，用于限制辐射并将其聚焦在待射线照相的物体（4）上。患者，用于检测通过物体的辐射的装置（10）和用于存储和处理包含在所述检测中的信息的装置。所述准直装置包括准直单元（3），准直单元（3）包括至少两个分离的，窄的邻接的基本上平行的准直槽（5），用于产生窄的扇形梁，所述狭槽优选地布置成与物体的纵向轴线对齐被拍摄。所述安装还包括用于相对于彼此至少基本上与所述准直槽的法线对准地移动所述准直缝隙和要被放射线照相的物体的装置（11,13），被选择进行射线照相的物体的那些部分被布置被来自多个不同方向的所述窄扇形光束暴露于辐射。从被放射照射的对象获得的信息优选地以数字形式存储并进行可视化处理。

8. 发明授权

US06683456B1 MRI magnet with reduced fringe field 失效
标题翻译： MRI磁铁具有减少的边缘场
公开(公告)号：US06683456B1
公开(公告)日：2004-01-27
申请号：US09611118
申请日：2000-07-06
申请人： Ilmari Kinanen
发明人： Ilmari Kinanen
IPC分类号： G01V300
CPC分类号： G01R33/421
摘要： An MRI scanner generates a temporally constant (B0) magnetic field through an examination region (10), as well as a surrounding fringe field. The fringe field tends to decrease in strength with distance from the examination region and includes a 5 Gauss line (70, 70′) and a 1 Gauss line (74). In a vertical field magnet, the 5 Gauss line can extend more than 3 or 4 meters above and below upper and lower pole assemblies (12, 14). By placing permanent magnets (70, 76) above and below the upper and lower pole assemblies, respectively, with an opposing magnetic polarity, the fringe field is shaped and controlled reducing a distance (d) of the 5 Gauss line above the scanner to about 2 meters and reducing an amount of ferrous material in a ferrous flux return path (24).
摘要翻译： MRI扫描仪通过检查区域（10）以及周围的边缘场产生时间上恒定的（B0）磁场。边缘场随距距离检查区域的强度而降低，包括5高斯线（70,70'）和1高斯线（74）。在垂直场磁体中，5高斯线可以在上下极组件（12,14）上方和下方延伸超过3或4米。通过分别以相反的磁极将永磁体（70,76）放置在上下极组件的上方和下方，边缘场的形状和控制将扫描仪上方的5高斯线的距离（d）减小到大约 2米，并减少含铁回流路径（24）中的铁质材料的量。

9. 发明授权

US06433550B1 MRI magnet with vibration compensation 失效
标题翻译： MRI磁体具有振动补偿
公开(公告)号：US06433550B1
公开(公告)日：2002-08-13
申请号：US09782250
申请日：2001-02-13
申请人： Ilmari Kinanen
发明人： Ilmari Kinanen
IPC分类号： G01V300
CPC分类号： G01R33/389 , G01R33/56563
摘要： In an open magnetic resonance system, pole pieces (16, 18) on opposite sides of an imaging region (10) are supported by a ferrous flux return path (20). During normal operation, environmental disturbances that cause low frequency vertical vibrations in the floor cause corresponding fluctuations in the main field of the magnet. A spacing between the pole pieces (16, 18) expands and contracts with the vibration causing a strength of the main field to fluctuate. A force transducer (60) under the magnet assembly measures the magnitude of the vibrations. A vibration analyzer (62) analyzes the vibrations waveform and calculates compensation for the changes in the interpole spacing. The vibration analyzer (62) controls one or more of a shim coil (70) which produces a field equal and opposite to the main field fluctuations, a reconstruction processor (52) to compensate for magnetic field resonance frequency fluctuations attributable to the main field fluctuations, and gradient magnetic fields applied by gradient field coils (22, 24).
摘要翻译：在开放式磁共振系统中，成像区域（10）的相对侧上的极片（16,18）由铁质磁通返回路径（20）支撑。在正常运行中，导致地面低频垂直振动的环境扰动引起磁铁主场相应的波动。极靴（16,18）之间的间距随着振动而膨胀和收缩，导致主场强度波动。磁体组件下方的力传感器（60）测量振动的大小。振动分析仪（62）分析振动波形，并计算补偿间距的变化。振动分析器（62）控制产生与主场波动相等且相反的场的垫片线圈（70）中的一个或多个，用于补偿归因于主场波动的磁场共振频率波动的重建处理器（52），以及由梯度场线圈（22,24）施加的梯度磁场。

10. 发明授权

US6104192A Magnetic resonance imaging system with floating pole pieces 失效
标题翻译：具有浮极片的磁共振成像系统
公开(公告)号：US6104192A
公开(公告)日：2000-08-15
申请号：US304741
申请日：1999-05-04
申请人： Gosta Jakob Ehnholm , Ilmari Kinanen , Robert G. Gylling , Ian R. Young , Gordon D. DeMeester
发明人： Gosta Jakob Ehnholm , Ilmari Kinanen , Robert G. Gylling , Ian R. Young , Gordon D. DeMeester
IPC分类号： G01R33/38 , G01R33/421 , G01V3/00
CPC分类号： G01R33/421 , G01R33/3806
摘要： A magnetic resonance imaging suite is sheathed with plates (32, 34, 36) of iron or other ferrous material. The plates define projections (42, 44, 54, 54', 68) in alignment with each other on opposite ceiling and floor or wall surfaces. A pair of magnetic pole pieces (10, 10'; 50, 50'; 60, 60') are surrounded by superconducting electromagnetic coils (12, 12'; 52, 52'; 62, 62'). The pole pieces are positioned between the ferrous plates in axial alignment. When current flows through the electromagnetic coils, magnetic flux flows between the pole pieces. The ferrous wall sheathing or other ferrous constructions define a flux return path. The pole pieces are magnetically attracted toward each other and are each magnetically mirrored in and attracted toward the adjacent ferrous flux return path. The pole pieces are positioned relative to each other and the ferrous flux return path such that the attraction between the pole pieces is balanced by the attraction between each pole piece and its magnetically mirrored image in the adjacent ferrous material of the flux return path. Optionally, the magnets are selectively extinguished and one or both pole pieces are moved for better access to the patient.
摘要翻译：磁共振成像套件包含铁或其他含铁材料的板（32,34,36）。板在相对的天花板和地板或墙壁表面上限定了彼此对准的突起（42,44,54,54'，68）。一对磁极片（10,10'; 50,50'; 60,60'）被超导电磁线圈（12,12'; 52,52'; 62,62'）包围。极片以轴向对准的方式定位在铁质板之间。当电流流过电磁线圈时，磁通量在极片之间流动。含铁壁护套或其他含铁结构限定了通量返回路径。极片彼此磁吸引，并且各自磁力镜像并被吸引到相邻的铁流量返回路径。极片相对于彼此定位，并且铁质磁通返回路径使得磁极片之间的吸引力通过磁通返回路径的相邻铁质材料中的每个磁极片与其磁反射图像之间的吸引力平衡。可选地，磁体被选择性地熄灭，并且一个或两个极片移动以更好地接近患者。

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