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48 条记录 (耗时 0.03 秒)

    Dynamic perfusion imaging
    21.
    发明授权
    Dynamic perfusion imaging 有权

    公开(公告)号：US09848843B2

    公开(公告)日：2017-12-26

    申请号：US14112047

    申请日：2012-04-17

    申请人： Michael Grass ,  Holger Schmitt

    发明人： Michael Grass ,  Holger Schmitt

    IPC分类号： A61B6/00

    CPC分类号： A61B6/481 ,  A61B6/00 ,  A61B6/486 ,  A61B6/503 ,  A61B6/507 ,  A61B6/5217 ,  A61B6/542 ,  A61B6/545 ,  F04C2270/0421

    摘要： A method includes scanning a region of interest, during a contrast agent based perfusion scan, at a predetermined temporal sampling rate during contrast agent uptake in the region of interest, and generating time frame data indicative of the scanned region of interest. The method further includes identifying a predetermined change in an amount of the contrast agent in the region of interest from the time frame data. The method further includes scanning the region of interest at a lower temporal sampling rate, which is lower than the temporal sampling rate during the contrast agent uptake, in response to identifying the predetermined change in the amount of the contrast agent in the region of interest.

    Wear resistant lead free alloy bushing and method of making
    25.
    发明授权
    Wear resistant lead free alloy bushing and method of making 有权
    耐磨无铅合金衬套及其制作方法

    公开(公告)号：US08679641B2

    公开(公告)日：2014-03-25

    申请号：US11830913

    申请日：2007-07-31

    申请人： David M. Saxton ,  James M. Carpenter ,  Gregory W. Sevenski ,  Holger Schmitt ,  Gerd Andler

    发明人： David M. Saxton ,  James M. Carpenter ,  Gregory W. Sevenski ,  Holger Schmitt ,  Gerd Andler

    IPC分类号： B22F3/00

    CPC分类号： F16C33/14 ,  B22F7/08 ,  B22F2998/10 ,  C22C1/0425 ,  C22C9/02 ,  C22C32/0021 ,  C22C32/0047 ,  F16C33/121 ,  F16C2204/10 ,  F16C2204/12 ,  F16C2220/20 ,  F16C2223/32 ,  Y02T10/865 ,  Y10T428/12014 ,  Y10T428/12049 ,  Y10T428/12056 ,  Y10T428/12063 ,  Y10T428/1209 ,  B22F3/10 ,  B22F3/18

    摘要： A bearing having improved wear resistance has a bearing material of a copper-tin-bismuth alloy which may also include phosphorus which has excellent strength, due to the solid solution of copper, tin and phosphorus (when used), attached to a steel backing shell. The material also has good lubricity as a result of the presence of the bismuth which also promotes tin mobilization and formation of a layer of tin on the bearing surface upon use of the bearing. The addition of small amounts of relatively small hard particles in the copper-tin-matrix, particularly Fe3P, MoSi2 or a mixture thereof, provides a suitable hard surface artifact to improve the wear resistance of the bearing material. The bearing includes a sintered powder compact bearing material of a copper-tin-bismuth alloy powder and a metal compound powder which is bonded to a steel backing shell, wherein the metal compound powder has an average particle size of less than 10 μm.

    摘要翻译： 具有改进的耐磨性的轴承具有铜 - 锡 - 铋合金的轴承材料，其也可以包括由于铜，锡和磷（当使用时）的固溶体而具有优异强度的磷，附着到钢背衬壳 。 由于铋的存在，该材料还具有良好的润滑性，其还在促使使用轴承时促进锡的移动和在轴承表面上形成锡层。 在铜 - 锡 - 基质，特别是Fe 3 P，MoSi 2或其混合物中加入少量相对较小的硬颗粒，提供了合适的硬表面伪影，以改善轴承材料的耐磨性。 轴承包括铜 - 铋合金粉末的烧结粉末紧凑型轴承材料和与钢背衬壳结合的金属化合物粉末，其中金属化合物粉末具有小于10μm的平均粒度。

    COMPUTED TOMOGRAPHY SYSTEM AND METHOD FOR TRACKING A BOLUS
    26.
    发明申请
    COMPUTED TOMOGRAPHY SYSTEM AND METHOD FOR TRACKING A BOLUS 有权
    计算机图像系统和追踪玻璃的方法

    公开(公告)号：US20130279783A1

    公开(公告)日：2013-10-24

    申请号：US13977042

    申请日：2012-01-04

    申请人： Holger Schmitt ,  Michael Grass

    发明人： Holger Schmitt ,  Michael Grass

    IPC分类号： G06T11/00

    CPC分类号： G06T11/008 ,  A61B6/032 ,  A61B6/469 ,  A61B6/481 ,  A61B6/488 ,  A61B6/504

    摘要： The present invention relates to a computed tomography system (10) and a corresponding method which enable tracking of a contrast material bolus and which involve a reduced radiation dose. The proposed computed tomography system (10) comprises an acquisition unit including an X-ray source (18) and an X-ray detector (30) for acquiring projection data sets (42, 44, 46), a reconstruction unit (41) for reconstructing a planning image (48) from a first projection data set (42), an identification unit (52) for identifying a region of interest (40) in the planning image (48), a selection unit (54) for selecting a projection angle (60) through the region of interest (40), a calculator (62) for calculating a target projection value (64) for a projection of said region of interest (40) with the selected projection angle (60), a control unit (32) for controlling said acquisition unit to acquire a second, reduced projection data set (44) including projection data from projections of said region of interest (40) with the selected projection angle (60), and a comparator (68) for comparing projection values of the second projection data set (44) with the target projection value (64), wherein the control unit (32) is adapted to control the acquisition unit to initiate the acquisition of a third projection data set (46) based on the comparison result (70) and to reconstruct a diagnostic image (50) from the third projection data set (46).

    摘要翻译： 本发明涉及计算机断层摄影系统（10）和相应的方法，其能够跟踪造影剂推注并涉及降低的辐射剂量。 所提出的计算机断层摄影系统（10）包括：采集单元，包括用于获取投影数据组（42,44,46）的X射线源（18）和X射线检测器（30）;重建单元（41），用于 从第一投影数据集（42）重建规划图像（48）;识别单元（52），用于识别所述规划图像（48）中的感兴趣区域（40）;选择单元（54），用于选择投影 通过感兴趣区域（40）的角度（60）;计算器（62），用于计算用于所选择的投影角度（60）的所述感兴趣区域（40）的投影的目标投影值（64）;控制单元 （32），用于控制所述获取单元以选择的投影角度（60）获取包括来自所述感兴趣区域（40）的投影的投影数据的第二缩小投影数据集（44），以及比较器 第二投影数据集（44）的投影值与目标投影值（64），w 这里，控制单元（32）适于控制采集单元基于比较结果（70）开始获取第三投影数据集（46），并且从第三投影数据集重建诊断图像（50） （46）。

    LEAD-FREE SINTERED LUBRICATING MATERIAL AND SINTER POWDER FOR MANUFACTURE OF THE SAME
    30.
    发明申请
    LEAD-FREE SINTERED LUBRICATING MATERIAL AND SINTER POWDER FOR MANUFACTURE OF THE SAME 有权
    无铅烧结材料和烧结粉末制造

    公开(公告)号：US20100190667A1

    公开(公告)日：2010-07-29

    申请号：US12669363

    申请日：2008-07-15

    申请人： Holger Schmitt ,  Thomas Enghof

    发明人： Holger Schmitt ,  Thomas Enghof

    IPC分类号： F16C33/00 ,  C10M125/26

    CPC分类号： C10M103/04 ,  C10M7/00 ,  C22C32/0068 ,  F16C33/121 ,  F16C2204/12

    摘要： The invention relates to a lead-free sliding bearing material having a Cu-based or CuSn-based sintered matrix and a solid lubricant. The solid lubricant contains hexagonal boron nitride in a fine-grained distribution with a mean particle size of 10 μm or less, wherein agglomerates of the particles of hexagonal boron nitride are not greater than 200 μm. The invention also relates to a sintering powder for producing the sliding bearing material, a sliding bearing composite material having a steel protective layer and a bearing layer composed of such a sintered-on sliding bearing material. The invention also relates to a sliding element composed of a sliding bearing composite material of the type mentioned above.

    摘要翻译： 本发明涉及一种具有Cu基或CuSn基烧结基体和固体润滑剂的无铅滑动轴承材料。 固体润滑剂含有平均粒径为10μm以下的细粒分布中的六方氮化硼，其中六方氮化硼的粒子的聚集体不大于200μm。 本发明还涉及一种用于制造滑动轴承材料的烧结粉末，具有钢保护层的滑动轴承复合材料和由这种烧结滑动轴承材料构成的轴承层。 本发明还涉及一种由上述类型的滑动轴承复合材料组成的滑动元件。