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公开(公告)号：US4190773A
公开(公告)日：1980-02-26
申请号：US812317
申请日：1977-07-01
申请人： Arthur B. Braden , John J. Kuwik , Samuel K. Taylor , John Covic
发明人： Arthur B. Braden , John J. Kuwik , Samuel K. Taylor , John Covic
CPC分类号： A61B6/4275 , A61B6/032 , A61B6/06 , G21K5/10
摘要： In a CT scanner having a rotating source of radiation and a series of stationary radiation detectors spaced about the axis of rotation of the source, an eclipsing shutter mechanism restricts the width of the diverging fan pattern of radiation to that portion of the patient scan circle which is intermediate the array of stationary detectors and the orbiting source. The eclipsing shutter may include a single elongated slit aperture for flooding the scan circle with radiation or a plurality of smaller apertures defining a collimator for continuously training each one of a plurality of discrete diverging beams in the fan pattern on a single stationary detector during rotation of the source for as long as the separate beam intersects the scan circle. An epicyclic gear train powered by the rotation of the source drives the shutter mechanism in a counter-rotation and causes the collimator to keep each beam aimed at a respective detector.
摘要翻译： 在具有旋转的辐射源的CT扫描器和围绕源的旋转轴线间隔开的一系列固定的辐射检测器的情况下，黯淡的快门机构将辐射的发散扇形图案的宽度限制到病人扫描圆的那部分， 位于固定式探测器阵列和轨道源之间。 日光快门可以包括用于用扫描圆充满辐射的单个细长狭缝孔，或者限定准直器的多个较小的孔，用于在旋转期间在单个静止检测器上连续训练在风扇图案中的多个离散发散光束中的每一个， 只要分离光束与扫描圆相交，源即可。 由源的旋转供电的行星齿轮系以反向旋转驱动快门机构，并使准直器将每个光束保持瞄准相应的检测器。
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公开(公告)号：US4304999A
公开(公告)日：1981-12-08
申请号：US192
申请日：1979-01-02
CPC分类号： A61B6/4275 , A61B6/032 , A61B6/06 , G21K1/025
摘要： Disclosed is a collimator for a tomographic scanner which performs the collimator function of dividing a fan of radiation into a multiplicity of finger beams and the attenuator function of causing a generally bell-shaped radiation energy distribution across a scan circle. The collimator has larger effective apertures for forming radiation into finger beams to traverse the center of the scan circle than for forming finger beams to traverse the edges of the scan circle. The width of the collimator apertures are defined by radially oriented vanes arranged along a circular arc. By offsetting the radiation source from the geometric center of the circular arc, the vanes defining the width of some apertures are more skewed than others relative to the radiation paths.
摘要翻译： 公开了一种用于断层扫描仪的准直器，其执行将辐射风扇分成多个指形光束的准直器功能以及在扫描圆周上引起大致钟形辐射能量分布的衰减器功能。 准直器具有更大的有效孔径，用于将辐射形成指状横梁以穿过扫描圆的中心，而不是形成指形横梁以横穿扫描圆的边缘。 准直器孔的宽度由沿着圆弧布置的径向取向的叶片限定。 通过将辐射源从圆弧的几何中心偏移，限定一些孔的宽度的叶片相对于辐射路径比其它孔更倾斜。
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3.发明授权Method of determining collimator aperture efficiency and apparatus with an efficient collimator aperture size 失效确定准直器孔径效率的方法和具有高效准直器孔径尺寸的装置
公开(公告)号：US4266135A
公开(公告)日：1981-05-05
申请号：US973570
申请日：1978-12-27
申请人： John J. Kuwik , Arthur B. Braden , Samuel K. Taylor , John Covic
发明人： John J. Kuwik , Arthur B. Braden , Samuel K. Taylor , John Covic
CPC分类号： A61B6/4275 , A61B6/032 , A61B6/06 , G21K5/10
摘要： The method of determining collimator aperture efficiency for a computerized tomographic scanner having a plurality of radiation detectors positioned along a detector arc, a source of radiation having a focal spot having radiation flux distribution positioned across a scan circle from at least part of the detector arc, and a collimator having a plurality of apertures arranged in a collimator arc around said source.Also disclosed is a tomographic scanner having a circular detector arc, a radiation source moveable along a circular arc and an arcuate collimator having apertures in which the width of the collimator aperture in the geometry of the system has high efficiency. The ratio of the detector radius to the source radius, to the collimator radius, to the aperture width is 36:24.3;9.4:0.024.
摘要翻译： 一种用于确定具有沿着检测器弧定位的多个辐射检测器的计算机断层扫描仪的准直器孔径效率的方法，具有从至少部分检测器弧定位在扫描圆周上的辐射通量分布的焦点的辐射源， 以及准直器，其具有布置在准直器中的多个孔围绕所述源。 还公开了一种断层扫描器，其具有圆形检测器弧，可沿着圆弧移动的辐射源和具有孔的弓形准直器，其中系统的几何形状中的准直器孔的宽度具有高效率。 检测器半径与源极半径相对于准直器半径与孔径宽度的比值为36：24.3; 9.4：0.024。
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4.发明授权
公开(公告)号：US4131802A
公开(公告)日：1978-12-26
申请号：US808821
申请日：1977-06-22
CPC分类号： A61B6/0457 , A61B6/0442 , A61B6/0471 , A61B6/501 , A61B6/547 , Y10S5/943
摘要： A versatile patient table system for transverse axial scanners employs front and rear tables with a spanning patient pallet for abdominal scans. A motorized conveyer belt on the front table increments the axial position of the patient. For brain scans the rear table and patient pallet are replaced by a head restraint assembly with a hinged headrest, check pad restraint members and a body pad which rests on the conveyer belt on the front table. In the automatic mode of operation, the belt moves either the body pad or the patient pallet out from the scanner in controlled increments triggered by the image processor. The hinged metal seam of the belt is used for indexing the extreme outward and inward positions.
摘要翻译： 用于横向轴向扫描仪的多功能患者台系统采用前后台，并配有横跨病人托盘进行腹部扫描。 前台上的电动输送带增加患者的轴向位置。 对于脑部扫描，后台和患者托盘由具有铰接头枕，止动垫约束构件和搁置在前台上的输送带上的身体垫的头枕组件代替。 在自动操作模式下，皮带以图像处理器触发的受控增量将身体垫或患者托盘从扫描仪移出。 带的铰链金属接缝用于将极端的向外和向内位置分度。
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公开(公告)号：US4253027A
公开(公告)日：1981-02-24
申请号：US915316
申请日：1978-06-14
摘要： A tomographic scanner for subjecting a planar region of a patient to radiation and producing an image representing the planar region in which at least the source or beam of radiation is moved with a varying speed. In particular, in a traverse and rotate type scanner, a carriage carrying the radiation source and detector(s) is traversed relative to the patient with generally simple harmonic motion. Additionally, vibration is reduced by using a motor, which may include a flywheel, running at substantially constant speed to traverse the carriage. Vibration is further reduced by connecting the motor for rotating the carriage to the carriage through a flexible, e.g. chain, drive. Cable connections to the X-ray tube and other elements carried by the moveable carriage are simplified with a bicycle-chain like flexible cable support.
摘要翻译： 一种断层扫描仪，用于使患者的平面区域辐射并产生表示至少所述源或辐射束以变化的速度移动的平面区域的图像。 特别地，在横移和旋转型扫描仪中，携带放射源和检测器的托架相对于具有大致简单的谐波运动的患者穿过。 此外，通过使用电动机来减少振动，该电动机可以包括以基本上恒定的速度运行以横越滑架的飞轮。 通过连接马达来进一步降低振动，所述马达通过柔性的，例如， 链，驱动。 通过自行车链条（如柔性电缆支架）简化了与可移动托架携带的X射线管和其他元件的电缆连接。
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公开(公告)号：US5206660A
公开(公告)日：1993-04-27
申请号：US705517
申请日：1991-05-24
申请人： Goeffrey G. Cochrane , Michael D. Tartamella , Philip W. McLean , Samuel K. Taylor , Christ H. Heipp
发明人： Goeffrey G. Cochrane , Michael D. Tartamella , Philip W. McLean , Samuel K. Taylor , Christ H. Heipp
IPC分类号： B41J15/04
CPC分类号： B41J15/04
摘要： A mobile printer having features particularly suited for use in a mobile conveyance such as an airplane. The printer stores a first data set in a memory that is accessed under control of a programmable controller. The printer then receives a second data set via a communications transceiver. Data from the first and second data sets are combined to form a composite bit mapped image which is printed by means of a thermal printhead controlled by the programmable controller.The thermal printhead uses rolls of thermally sensitive paper which are supported by means of a mandrel roll. The thermal paper is positioned adjacent the print head by means of a platen roll. A biasing force is provided to bias the platen roll away from the print head when a door in the printer housing is opened to provide a space into which the free end of the roll of paper can enter. A cam is provided on the underside of the door to close the gap between the platen roll and the print head when the housing door is closed so that the platen roll presses the paper against the print head while the printing operation takes place. A back pressure acts on the paper upstream of the platen and idler rolls to straighten the paper with respect to the print head.
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