-
公开(公告)号：US4071771A
公开(公告)日：1978-01-31
申请号：US700538
申请日：1976-06-28
申请人： John Covic , Thomas R. McBride
发明人： John Covic , Thomas R. McBride
摘要： Rotary safety shutter mechanisms for use in computerized tomographic X-ray scanners of the type wherein a source of radiation and a detector means are mounted for movement on opposite sides of a medium in order that the radiation passes through successive planar sections of medium and is attenuated and detected to give an output. The safety shutter mechanisms are arranged to be positioned adjacent the outlet aperture of the radiation source to selectively block the outlet upon occurrence of a predetermined condition. Two different embodiments of safety shutter mechanisms are disclosed. In each embodiment, the mechanism comprises a housing mounted adjacent the outlet aperture and having a through passage through which radiation from the source can pass. A cylindrical shutter member is carried in the housing transversely of the passage and mounted for rotary movement between a first position which permits the flow of radiation from the source and a second position which blocks the flow. In the first embodiment, the shutter member is moved from the second to the first position by a linear solenoid connected with the shutter member through a crank which is continually biased to move the shutter to the second position. In the second embodiment, the shutter member is actuated to the first position by a rotary solenoid aligned with the axis of rotation of the shutter member and directly coupled thereto.
摘要翻译： 用于计算机断层X射线扫描仪的旋转安全快门机构，其中安装辐射源和检测器装置以在介质的相对侧上移动，以使得辐射通过介质的连续平面部分并被衰减 并检测到输出。 安全闸板机构布置成邻近辐射源的出口孔定位，以在出现预定条件时选择性地阻挡出口。 公开了安全快门机构的两个不同实施例。 在每个实施例中，机构包括邻近出口孔安装的壳体，并且具有穿过来自源的辐射通过的贯穿通道。 圆柱形活门构件在通道的横向上被承载在壳体中，并被安装用于在允许来自源的辐射的第一位置和阻挡流动的第二位置之间的旋转运动。 在第一实施例中，活门构件通过连续偏置以将活门移动到第二位置的曲柄通过与活门构件连接的线性电磁铁从第二位置移动到第一位置。 在第二实施例中，活门构件通过与活门构件的旋转轴对准并直接联接到其上的旋转螺线管致动到第一位置。
-
92.发明授权
公开(公告)号：US4029967A
公开(公告)日：1977-06-14
申请号：US526187
申请日：1974-11-22
申请人： Karl-Heinz Tetzlaff
发明人： Karl-Heinz Tetzlaff
摘要： An irradiation device for the uniform irradiation of goods by means of electro-magnetic radiation having a quantum energy larger than 5 KeV comprises at least one radiation source, means for the reception of goods to be irradiated, and at least one shielding element arranged laterally of the radiation path from the radiation source and the center axis of the goods in such a manner that the shielding effect of the shielding element increases with increasing lateral space from this radiation path. The radiation source, the shielding element and the means for the reception of the goods to be irradiated are arranged to allow for the radiation to enter the goods through the entire superficies thereof in such a way that the region immediately around the center axis of the goods is irradiated without radiation being affected by the shielding element.
摘要翻译： 用于通过具有大于5KeV的量子能量的电磁辐射来均匀照射商品的照射装置包括至少一个辐射源，用于接收被照射的商品的装置和至少一个屏蔽元件 以辐射源和商品的中心轴的辐射路径，使得屏蔽元件的屏蔽效应随着从该辐射路径的横向空间的增加而增加。 辐射源，屏蔽元件和用于接收被照射的货物的装置被布置成允许辐射通过其整个表面进入货物，使得紧邻商品的中心轴线的区域 被辐照而不受屏蔽元件的影响。
-
93.发明授权Diaphragm arrangement for adjustable aperture, especially for erecting a radiation beam 失效用于可调节孔径的隔膜装置，特别是用于竖立辐射束
公开(公告)号：US4027167A
公开(公告)日：1977-05-31
申请号：US590792
申请日：1975-06-27
申请人： Max Pollermann
发明人： Max Pollermann
摘要： An adjustable diaphragm arrangement, or device, for defining an aperture ch confines a beam of radiation, especially for radiation therapy, in which cup shaped diaphragm elements, the edges of which define the edge of the aperture and which elements are concave toward a common point at or near the source of radiation, are tiltably mounted for simultaneous movement to control the size of the aperture, and may, in addition, be rotatable to vary the orientation of the aperture, all of the aforesaid movements being carried out without change in the axis of the beam of radiation. The parts of the device may be formed of a material which strongly absorbs radiation.
摘要翻译： 一种可调整的膜片装置或装置，用于限定限制辐射束特别是辐射治疗的孔，其中杯状隔膜元件的边缘限定孔的边缘，哪些元件朝向共同点 在辐射源处或附近，可倾斜地安装以同时运动以控制孔的尺寸，并且另外可以旋转以改变孔的取向，所有上述移动在不改变的情况下被执行 辐射束的轴。 器件的部件可以由强烈吸收辐射的材料形成。
-
公开(公告)号：US4027156A
公开(公告)日：1977-05-31
申请号：US689890
申请日：1976-05-25
申请人： McLouis Robinet
发明人： McLouis Robinet
摘要： An apparatus is provided for controlling the activation of a high energy radiation source having a shutter. The apparatus includes magnets and magnetically responsive switches appropriately placed and interconnected so that only with the shutter and other parts of the source in proper position can safe emission of radiation out an open shutter occur.
摘要翻译： 提供了一种用于控制具有快门的高能量辐射源的激活的装置。 该装置包括适当地放置和互连的磁体和磁响应开关，使得只有在快门和源的其他部分处于适当位置才能安全地发射出一个打开的快门。
-
公开(公告)号：US3936647A
公开(公告)日：1976-02-03
申请号：US492842
申请日：1974-07-29
CPC分类号： A61B6/06 , G21K1/04 , A61B6/4021
摘要： In an X-ray collimator including both "near" and "far" shutter mechanisms, the improvement comprising locating two pairs of independently movable near shutters within an outwardly extending lead cone. The cone is positioned against the X-ray generator tube window and as a result the near shutters are in closer proximity to the focal spot of a rotating anode disc of an X-ray tube than heretofore possible. The cone contains an aperture which defines the maximum size of the primary beam passing through the shutter mechanisms; however, the body of the cone and the closer positioning of the near shutters to the focal spot effectively controls and restricts secondary radiation which is emitted at angles different from the primary beam passing through the collimator.
摘要翻译： 在包括“近”和“远”快门机构的X射线准直器中，改进包括在向外延伸的引导锥体内定位两对可独立移动的近百叶窗。 锥体被定位在X射线发生器管窗口的上方，结果近近的百叶窗更靠近X射线管的旋转阳极盘的焦点，比迄今为止可能的那样。 锥体包含限定通过快门机构的主光束的最大尺寸的孔; 然而，锥体的主体和靠近快门到焦点的更靠近的位置有效地控制和限制了与穿过准直器的主光束不同的角度发射的二次辐射。
-
公开(公告)号：US3643095A
公开(公告)日：1972-02-15
申请号：US3643095D
申请日：1969-11-28
申请人： PICKER CORP
发明人： SHUSTER RONALD F
摘要： In X-ray apparatus, shutter opening dimensions are controlled automatically in accordance with the distance of an X-ray tube from a film and the size of film being used. Shutter opening is controlled automatically in accordance with film size only when the X-ray tube is oriented in particular directions, and is spaced from the film within a predetermined range of distances. Actual shutter opening is compared with computed, desired shutter opening and the actual shutter opening adjusted to correspond to the desired opening. The circuitry is digital in nature, as opposed to analog, and energizes shutter drive motors to operate at fixed speed to adjust the shutters properly, at which time the motors are completely deenergized. Means are provided for manually adjusting the shutter opening when it is desired not to operate automatically, or when the Xray tube is oriented in other than predetermined directions, or when the X-ray tube is spaced from the film by a distance outside the predetermined range.
-
-
-
-
-
搜索结果
96 条记录 (耗时 0.012 秒)
