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公开(公告)号：US4399550A
公开(公告)日：1983-08-16
申请号：US238910
申请日：1981-02-27
摘要： Curved X-ray filter elements are arranged circularly around a drum. Alternate circumferentially adjacent elements have different filtration properties. Diametrically opposite elements have the same properties. An X-ray source provides a sequence of alternate low and high energy X-ray beam pulses. A multicell X-ray detector produces X-ray attenuation data for each pulse and the data is switched to alternate memories. A drum drive motor is energized at power line frequency. A pinion on the motor shaft turns a gear. A lug that is mounted for angular adjustment on the gear drives the drum. A multiple blade shutter is also mounted on the gear for angular adjustment and rotation with the gear. The shutter alternately interrupts and restores a light beam to a photosensitive device which produces corresponding signal state changes or trigger signals. The signals are used to synchronize the low and high energy X-ray pulses, the filter element angular locations and memory switching with power line frequency.
摘要翻译： 弯曲的X射线滤光片元件围绕鼓圆周布置。 替代的周向相邻元件具有不同的过滤性能。 直径相对的元件具有相同的特性。 X射线源提供了一系列交替的低能量和高能量X射线束脉冲。 多单元X射线检测器为每个脉冲产生X射线衰减数据，并将数据切换到备用存储器。 鼓驱动电机在电源线频率下通电。 马达轴上的小齿轮转动齿轮。 安装在齿轮上进行角度调节的凸耳驱动滚筒。 多叶片快门也安装在齿轮上，用于与齿轮进行角度调节和旋转。 快门交替地中断并将光束恢复到产生对应的信号状态改变或触发信号的光敏装置。 这些信号用于同步低能量和高能量X射线脉冲，滤波器元件角位置和电源线频率的存储器切换。
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公开(公告)号：US4361902A
公开(公告)日：1982-11-30
申请号：US166483
申请日：1980-07-07
申请人： Richard T. Brandt , Robert B. Hauck
发明人： Richard T. Brandt , Robert B. Hauck
摘要： A collimator assembly for defining an aperture for the passage of a diagnostic x-ray beam in an x-ray diagnostic apparatus which may, for example, be used in computer assisted tomography. The collimator assembly comprises a framework adapted to be secured to the x-ray apparatus contiguous the x-ray tube, and includes a first and a second blade subassembly lying in a common plane with each other in the path of x-rays emanating from the x-ray tube. Leaf spring means connect each of the blade subassemblies to the framework, the leaf spring means biasing the first and second blade subassemblies into abutting relation to each other whereby to define a zero aperture condition for the passage of a diagnostic x-ray beam through said collimator assembly to the patient. Cam follower means are carried by each of the respective first and second blade subassemblies, and movable cam means are mounted on the framework and engageable with the cam follower means of said first and said second blade subassemblies whereby movement of the cam means is effective to move the first and second blade subassemblies against the biasing force of the spring means to a controlled degree of opening between the first and second blade subassemblies whereby to define a collimating aperture of a predetermined size between said subassemblies for the passage of a diagnostic x-ray beam of a predetermined size to the patient. A further feature of the collimator assembly is the use of a direct acting sensing arrangement for sensing the collimating opening between the two blade subassemblies. This sensing arrangement is embodied in an electromagnetic transducer in the form of a linear variable differential transformer.
摘要翻译： 准直器组件，其用于限定用于X射线诊断装置中的诊断X射线束通过的孔，其可以例如用于计算机辅助断层摄影。 准直器组件包括适于固定到邻近x射线管的x射线设备的框架，并且包括位于公共平面中的第一和第二叶片子组件，所述第一和第二叶片子组件在从所述X射线管发射的x射线的路径中彼此相对 x射线管。 叶片弹簧装置将每个叶片子组件连接到框架上，板簧装置将第一和第二叶片子组件偏置成彼此邻接关系，从而限定零孔径条件，以使诊断X射线束通过所述准直仪 组装到病人身上。 凸轮从动装置由相应的第一和第二叶片子组件中的每一个承载，并且可移动的凸轮装置安装在框架上并且可与所述第一和第二叶片子组件的凸轮从动装置接合，由此凸轮装置的运动有效地移动 所述第一和第二叶片子组件克服所述弹簧装置的偏压力，在所述第一和第二叶片子组件之间的受控程度的开度，从而在所述子组件之间限定预定尺寸的准直孔以便通过诊断X射线束 具有预定尺寸的患者。 准直器组件的另一个特征是使用直接作用的感测装置来感测两个叶片子组件之间的准直开口。 该感测装置体现在线性可变差动变压器形式的电磁换能器中。
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公开(公告)号：US4845734A
公开(公告)日：1989-07-04
申请号：US674122
申请日：1984-11-21
CPC分类号： G03B42/025
摘要： A spot-film device includes an inner carriage whose three members are movable with respect to an outer carriage to provide a cassette tray that will accommodate varying cassette sizes. After insertion of a cassette, the inner carriage automatically contracts to a clamping position and is then movable longitudinally of the table to provide selective placement of the cassette for x-ray exposure. Lateral movement for that purpose is brought about by movement of the outer carriage. A single motor is used to provide both longitudinal clamping and longitudinal transport of the cassette while another motor provides both lateral clamping and lateral transport thereof. The lateral drive mechanism also provides for automatic ejection of a cassette after exposure.
摘要翻译： 点胶膜装置包括内部支架，其三个构件可相对于外部滑架移动，以提供将容纳变化的盒尺寸的盒式盘。 在插入盒式磁带之后，内托架自动收缩到夹紧位置，然后可以在工作台的纵向移动，以提供用于x射线曝光的盒的选择性放置。 为此目的的侧向运动是通过外部托架的运动引起的。 单个电动机用于提供盒的纵向夹紧和纵向输送，而另一个电动机提供横向夹紧和侧向运输。 横向驱动机构还可以在曝光后自动弹出暗盒。
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公开(公告)号：US4501011A
公开(公告)日：1985-02-19
申请号：US421603
申请日：1982-09-22
申请人： Robert B. Hauck , Larry Susami
发明人： Robert B. Hauck , Larry Susami
CPC分类号： A61B6/4464
摘要： Means for coupling an independently suspended medical x-ray source and detector for lateral fluorographic studies such as angiography. When coupled, the x-ray source and detector move vertically in opposite directions, move horizontally toward or away from each other, and pivot about horizontal axes so the distances between the focal spot and isocenter of examination and between the isocenter and image each remain constant, and so the central ray of the source coincides with the central ray of the detector. The bridge also rotates to rotate the entire assembly about a vertical axis passing through the isocenter.The x-ray source and detector are independently hung from the ceiling to support them directly above their centers of weight, eliminating the bending moments and oscillation which are inherent features of prior C-arm structures.
摘要翻译： 用于联合独立悬挂的医用x射线源和用于横向氟摄影研究如血管造影的检测器的装置。 当耦合时，X射线源和检测器沿相反方向垂直移动，水平朝向或远离彼此移动，并且围绕水平轴线枢转，使得焦斑与等角点之间以及等角点与图像之间的距离保持恒定 ，因此源的中心射线与检测器的中心射线重合。 桥梁也旋转以使整个组件围绕穿过等角点的垂直轴线旋转。 X射线源和检测器独立地从天花板悬挂，以将它们直接支撑在其重心上方，消除了作为现有C臂结构的固有特征的弯矩和振动。
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