Post-patient dynamic filter for computed tomography (CT)
    41.
    发明授权
    Post-patient dynamic filter for computed tomography (CT) 有权
    用于计算机断层扫描(CT)的患者后动态滤波器

    公开(公告)号:US09044187B2

    公开(公告)日:2015-06-02

    申请号:US13992302

    申请日:2011-12-02

    摘要: An imaging system includes a radiation source (310) configured to rotate around an examination region about a z-axis and having a focal spot that emits a radiation beam that traverses the examination region. The system further includes a radiation sensitive detector array (314) with a plurality of detector pixels that detects radiation traversing the examination region and generates projection data indicative of the detected radiation. The system further includes a dynamic post-patient filter (316) including one or more filter segments (402, 802, 902, 1004, 1102). The filter is configured to selectively and dynamically move in front of the detector array between the detector array and the examination region and into and out of a path of the radiation beam illuminating the detector pixels during scanning an object or subject based on a shape of the object or subject, thereby filtering unattenuated radiation and radiation traversing a periphery of the object or subject.

    摘要翻译: 成像系统包括被配置为围绕z轴围绕检查区域旋转并具有发射穿过检查区域的辐射束的焦点的辐射源(310)。 该系统还包括具有多个检测器像素的辐射敏感检测器阵列(314),其检测穿过检查区域的辐射,并产生指示检测到的辐射的投影数据。 该系统还包括动态的患者后过滤器(316),其包括一个或多个过滤器段(402,802,902,1004,1102)。 滤波器被配置为在检测器阵列和检查区域之间选择性地和动态地在检测器阵列之前移动,并且在扫描对象或被摄体期间,在扫描对象或被摄体期间进入和离开照射检测器像素的辐射束的路径, 物体或物体,从而过滤未被衰减的辐射和穿过物体或物体的周边的辐射。

    Forward projection apparatus
    42.
    发明授权
    Forward projection apparatus 有权
    前投投影仪

    公开(公告)号:US09002090B2

    公开(公告)日:2015-04-07

    申请号:US13988349

    申请日:2011-11-16

    IPC分类号: G06K9/00 G06T11/00

    摘要: The invention relates to a forward projection apparatus for performing a forward projection through an image (22), wherein at least one of a number of rays (20, 21) for performing the forward projection, a ray spacing between the rays and a kernel width of an interpolation kernel for calculating interpolated values located on the rays is varied depending on the ray width relative to an effective image element spacing between image elements (24) of the image. This allows reducing artifacts in simulated projection data and, thus, in an image, which is iteratively reconstructed by using the simulated projection data. For example, if the number of provided rays and/or the ray spacing between the provided rays is varied, aliasing artifacts can be reduced. Moreover, if the ray spacing between the provided rays and/or the kernel width of the interpolation kernel is varied, artifacts caused by varying effective kernel widths may be reduced.

    摘要翻译: 本发明涉及一种用于通过图像(22)进行向前投影的前投影装置,其中,用于执行向前投影的多个光线(20,21)中的至少一个,光线之间的光线间隔和核宽度 用于计算位于光线上的内插值的插值内核根据相对于图像的图像元素(24)之间的有效图像元素间隔的光线宽度而变化。 这允许减少模拟投影数据中的伪影,并因此减少通过使用模拟投影数据迭代重建的图像。 例如,如果提供的光线的数量和/或所提供的光线之间的光线间隔变化,则可以减少混叠伪影。 此外,如果所提供的光线之间的光线间距和/或内插核的内核宽度发生变化,则可能会降低由变化的有效内核宽度引起的伪影。

    Mechanism for securing a shaft-hub connection of two shafts
    45.
    发明授权
    Mechanism for securing a shaft-hub connection of two shafts 有权
    用于固定两个轴的轴毂连接的机构

    公开(公告)号:US08206055B2

    公开(公告)日:2012-06-26

    申请号:US12084474

    申请日:2006-10-26

    IPC分类号: B25G3/28

    摘要: A coupling mechanism secures a shaft-to-collar connection for two shafts, such as an extension shaft stub and a tractor PTO shaft. An annular locking element on the first shaft prevents an axial disconnection of an established connection. One of the shafts has a collar with a positive engagement element for a locking engagement with the other shaft. The other shaft includes a positive engagement for a locking engagement with the collar. To enable an easier handling of the axial locking of the shaft to collar connection, the locking element includes a first set of teeth which are complementarily to a second set of teeth on the second shaft. The locking element is rotatably arranged on the first shaft and can be rotated from a locked position to an unlocked position. In the locked position the teeth overlap.

    摘要翻译: 联接机构固定两个轴的轴对环连接,例如延伸轴短柱和拖拉机PTO轴。 第一轴上的环形锁定元件防止已建立的连接件的轴向断开。 其中一个轴具有带有用于与另一轴锁定接合的正接合元件的轴环。 另一个轴包括用于与套环锁定接合的正接合。 为了更容易地处理轴到轴环连接的轴向锁定,锁定元件包括与第二轴上的第二组齿互补的第一组齿。 锁定元件可旋转地布置在第一轴上并且可以从锁定位置旋转到解锁位置。 在锁定位置,牙齿重叠。

    MECHANISM FOR SECURING A SHAFT-HUB CONNECTION OF TWO SHAFTS
    46.
    发明申请
    MECHANISM FOR SECURING A SHAFT-HUB CONNECTION OF TWO SHAFTS 有权
    用于保护两个SHAFT-HUB连接的机构

    公开(公告)号:US20100240464A1

    公开(公告)日:2010-09-23

    申请号:US12084474

    申请日:2006-10-26

    IPC分类号: F16D1/06

    摘要: The present invention relates to a device for securing a shaft to collar connection (16) of two shafts (12, 14), in particular for securing a PTO shaft stub (14) of a PTO shaft of a tractor. The device comprises a locking element (40) preventing a disconnection of an established shaft to collar connection (16) between the two shafts (12, 14) in axial direction. One of the two shafts (12) comprises a collar (15) with a positive engagement element (38) for a locking engagement with the other shaft (14). The other shaft (14) comprises a positive engagement (22) for a locking engagement with the shaft (12) comprising the collar (15). The locking element (40) is basically ring-shaped and arranged at the first of the two shafts (12). In order to enable an easier handling of the axial locking of the shaft to collar connection (16), it is suggested, that the locking element comprises a toothing (44), which is basically complementarily formed to the toothing (22) of the second of the two shafts (14). The locking element (40) is rotatably arranged on the first shaft (12) and can be rotated from a locked position to an unlocked position. In the locked position the toothing (22, 44) is arranged such that they overlap. In the unlocked position the toothing (22, 44) is arranged such that they do not overlap. The locking element (40) is arranged such that in the locked position of the locking element (40) an established shaft to collar connection (16) is secured by the engagement of the toothings (22, 44) of the two shafts (12, 14). Furthermore the present invention relates to a shaft (12) of the locking device.

    摘要翻译: 本发明涉及一种用于将轴固定到两个轴(12,14)的套环连接件(16)的装置,特别是用于固定拖拉机的PTO轴的PTO轴短柱(14)。 该装置包括锁定元件(40),用于防止已建立的轴在轴向方向上在两个轴(12,14)之间断开颈圈连接部(16)。 两个轴(12)中的一个包括具有用于与另一轴(14)锁定接合的正接合元件(38)的轴环(15)。 另一个轴(14)包括用于与包括轴环(15)的轴(12)的锁定接合的正接合(22)。 锁定元件(40)基本上是环形的并且布置在两个轴(12)的第一个处。 为了能够更容易地处理轴到轴环连接件(16)的轴向锁定,建议锁定元件包括齿部(44),该齿部(44)基本上互补地形成于第二齿圈(22)的齿部(22) 的两个轴(14)。 锁定元件(40)可旋转地布置在第一轴(12)上并且可以从锁定位置旋转到解锁位置。 在锁定位置,齿(22,44)被布置成使得它们重叠。 在解锁位置,齿(22,44)被布置成使得它们不重叠。 锁定元件(40)被布置成使得在锁定元件(40)的锁定位置,通过两个轴(12,12)的齿轮(22,44)的接合来固定已建立的轴与套环连接件(16) 14)。 此外,本发明涉及锁定装置的轴(12)。

    Linear guide arrangement
    48.
    发明授权
    Linear guide arrangement 失效
    直线导轨装置

    公开(公告)号:US06513976B2

    公开(公告)日:2003-02-04

    申请号:US09970636

    申请日:2001-10-04

    IPC分类号: F16C2906

    摘要: In a linear guide arrangement (10a) with an elongated guide rail (12a) and a guide carriage (14a) that can travel thereon in the lengthwise direction (L) of the guide rail (12a), a surface of the guide rail (12a) facing the guide carriage (14a) is covered by a cover band (24a). A band securing element (32a) is placed in the vicinity of each of the two longitudinal ends (30a) of the guide rail (12a). The two band securing elements (32a) jointly secure the cover band (24a) at least with respect to its displacement in lengthwise direction (L) of the guide rail (12a), wherein each of the band securing elements (32a) at least impedes movement of the cover band (24a) relative to the guide rail (12a) directed towards the other band securing element (32a). At least one of the band securing elements (32a) can be non-positively engaged with the cover band (24a) as well as with the guide rail (12a).

    摘要翻译: 在具有细长导轨(12a)的直线引导装置(10a)和能够在导轨(12a)的长度方向(L)上行进的引导滑架(14a)上,导轨(12a)的表面 )面向导向架(14a)被盖带(24a)覆盖。 带固定元件(32a)被放置在导轨(12a)的两个纵向端部(30a)中的每一个附近。 两个带固定元件(32a)至少相对于其在导轨(12a)的长度方向(L)上的位移共同固定盖带(24a),其中每个带固定元件(32a)至少阻碍 所述盖带(24a)相对于所述导轨(12a)指向另一带固定元件(32a)的运动。 带固定元件(32a)中的至少一个可以与盖带(24a)以及导轨(12a)非积极地接合。