-
公开(公告)号：US6018563A
公开(公告)日：2000-01-25
申请号：US986945
申请日：1997-12-08
CPC分类号： A61B6/14 , G01N23/046 , H05G1/44 , H05G1/64 , G01N2223/419
摘要： An X-ray imaging apparatus including an X-ray tube which emits X-rays, an image sensor which detects X-rays which pass through an object, a support arm which supports the X-ray tube and the image sensor so that they are opposed to each other across the object, a driving motor which moves the support arm in a predetermined direction, a gain adjustment circuit which adjusts the imaging sensitivity of the image sensor and a controlling circuit for controlling the gain of the adjusting circuit. The controlling circuit controls the gain adjusting circuit on the basis of the detected image density of the image sensor. When the adjustment by means of the gain adjusting circuit is insufficient, the controlling circuit controls X-ray tube current, X-ray tube voltage and driving speed adjusters.
摘要翻译： 一种X射线成像装置，包括发射X射线的X射线管，检测穿过物体的X射线的图像传感器，支撑X射线管的支撑臂和图像传感器，使得它们是 相对于物体彼此相对的驱动电机，使支撑臂沿预定方向移动的驱动电动机，调整图像传感器的成像灵敏度的增益调整电路和用于控制调整电路的增益的控制电路。 控制电路根据检测到的图像传感器的图像浓度控制增益调整电路。 当通过增益调节电路的调整不足时，控制电路控制X射线管电流，X射线管电压和驱动速度调节器。
-
公开(公告)号：US6118842A
公开(公告)日：2000-09-12
申请号：US987218
申请日：1997-12-09
CPC分类号： A61B6/032 , A61B6/14 , A61B6/06 , Y10S378/901
摘要： An object of the invention is to provide a dual-purpose X-ray imaging apparatus capable of partial CT imaging in addition to panoramic tomographic imaging. Another object of the invention is to provide a dedicated partial X-ray CT imaging apparatus. An X-ray imaging apparatus comprises an X-ray source 28 which irradiates an object with X-rays; an image sensor 38 which detects X-rays having passed through the object; a support arm 24 which supports the X-ray source 28 and the image sensor 38; and a plurality of motors for moving the support arm 24. These motors move the X-ray source 28 and image sensor 38 along a CT image formation locus in the CT mode, and the X-ray source 28 and the image sensor 38 along a panoramic image formation locus in the case of the panorama mode.
摘要翻译： 本发明的一个目的是提供一种能够进行全景断层摄影成像的部分CT成像的双用途X射线成像装置。 本发明的另一个目的是提供专用的部分X射线CT成像装置。 X射线成像装置包括用X射线照射物体的X射线源28; 检测穿过物体的X射线的图像传感器38; 支撑X射线源28和图像传感器38的支撑臂24; 以及用于移动支撑臂24的多个电动机。这些电动机沿CT模式沿着CT成像轨迹移动X射线源28和图像传感器38，并且沿着X射线源28和图像传感器38沿着 全景图像形成轨迹在全景模式的情况下。
-
公开(公告)号：US5677940A
公开(公告)日：1997-10-14
申请号：US618991
申请日：1996-03-20
申请人： Masakazu Suzuki , Keisuke Mori , Akifumi Tachibana , Kazunari Matoba , Koei Yamamoto , Seiichiro Mizuno
发明人： Masakazu Suzuki , Keisuke Mori , Akifumi Tachibana , Kazunari Matoba , Koei Yamamoto , Seiichiro Mizuno
摘要： A digital X-ray imaging apparatus comprises an X-ray generator 6 for generating X-rays toward a subject, an X-ray imaging device 7 for detecting an image of X-rays having passed through the subject, a swivel member 4 and a horizontal movement means 8 provided with the X-ray generator 6 and the X-ray imaging device 7 opposed to each other to relatively move the X-ray generator 6 and the X-ray imaging device 7 with respect to the subject, a CPU 21 for producing a tomographic image in accordance with an imaging signal from the X-ray imaging device 7, frame memories and an image display unit 26 for displaying the tomographic image. The X-ray imaging device 7 includes a MOS image sensor having a plurality of two-dimensional light-receiving pixels. With this configuration, a tomographic image along a given tomographic plane can be produced by a signal X-ray imaging operation, and the imaging sensitivity of the digital X-ray imaging apparatus can be enhanced.
摘要翻译： 数字X射线成像装置包括用于向被检体产生X射线的X射线发生器6，用于检测穿过被检体的X射线的图像的X射线成像装置7，旋转构件4和 设置有彼此相对的X射线发生器6和X射线摄像装置7的相对于被摄体使X射线发生器6和X射线摄像装置7相对移动的水平移动机构8，CPU21 用于根据来自X射线成像装置7的成像信号，帧存储器和用于显示断层图像的图像显示单元26产生断层图像。 X射线成像装置7包括具有多个二维光接收像素的MOS图像传感器。 利用这种配置，可以通过信号X射线成像操作来产生沿着给定的断层摄影平面的断层图像，并且可以提高数字X射线成像装置的成像灵敏度。
-
公开(公告)号：US5664001A
公开(公告)日：1997-09-02
申请号：US621015
申请日：1996-03-22
申请人： Akifumi Tachibana , Keisuke Mori , Masakazu Suzuki , Kazunari Matoba , Hitoshi Asai , Toshitaka Takeguchi , Kazuhisa Miyaguchi
发明人： Akifumi Tachibana , Keisuke Mori , Masakazu Suzuki , Kazunari Matoba , Hitoshi Asai , Toshitaka Takeguchi , Kazuhisa Miyaguchi
CPC分类号： A61B6/14
摘要： A medical X-ray imaging apparatus is provided, which comprises an X-ray source, an X-ray imaging device for detecting an image of X-rays having passed through a subject and a swivel member for-rotating the X-ray source and the X-ray imaging device around the subject. The X-ray imaging device comprises a CCD sensor for performing the TDI operation and a dosage sensor for detecting X-rays having passed. Dosage signal Y and transfer speed signal X corresponding to the frequency of a false vertical transfer clock are supplied to a divider, and control signal Z is outputted. When control signal Z is supplied to an X-ray control circuit via a delay circuit, the X-ray irradiation dosage of the X-ray source can be feedback-controlled properly.
摘要翻译： 本发明提供一种医用X射线成像装置，其包括X射线源，用于检测穿过被检体的X射线的图像的X射线成像装置和用于使X射线源旋转的旋转构件，以及 被摄物体周围的X射线成像装置。 X射线成像装置包括用于执行TDI操作的CCD传感器和用于检测已经通过的X射线的剂量传感器。 对应于假垂直传送时钟的频率的剂量信号Y和传送速度信号X被提供给分频器，并且输出控制信号Z。 当通过延迟电路将控制信号Z提供给X射线控制电路时，可以适当地反馈控制X射线源的X射线照射量。
-
公开(公告)号：US06289074B1
公开(公告)日：2001-09-11
申请号：US09388282
申请日：1999-09-01
IPC分类号： A61B603
摘要： An X-ray computed tomography (CT) method of producing sectional images and panoramic images while reducing the exposure dose and time. The method includes producing an X-ray projection image on a two-demensional X-ray image sensor by turning a rotary arm within a scope of angle according to the projection conditions, while locally radiating conical X-ray beams, with a small width in the rotating direction of the beams, with the rotating center of the rotary arm fixed at the center position of the region to be X-rayed and the X-ray projection images are processed using specific equation as previously prepared by a computer to extract image information, and thereby to produce a sectional image of the local region of the object to be examined.
摘要翻译： 一种在减少曝光剂量和时间的同时产生截面图像和全景图像的X射线计算机断层摄影（CT）方法。 该方法包括：在二维X射线图像传感器的基础上，通过在旋转臂的角度范围内，根据投影条件旋转X射线投射图像，同时局部地辐射锥形X射线束，其宽度小 梁的旋转方向，其中旋转臂的旋转中心固定在要被X射线的区域的中心位置处，并且使用由计算机预先准备的特定方程来处理X射线投影图像以提取图像信息 ，从而产生被检查物体的局部区域的截面图像。
-
公开(公告)号：US5600699A
公开(公告)日：1997-02-04
申请号：US598442
申请日：1996-02-08
申请人： Masakazu Suzuki , Keisuke Mori , Akifumi Tachibana , Kazunari Matoba , Hitoshi Asai , Kazuhisa Miyaguchi
发明人： Masakazu Suzuki , Keisuke Mori , Akifumi Tachibana , Kazunari Matoba , Hitoshi Asai , Kazuhisa Miyaguchi
CPC分类号： A61B6/4233 , A61B6/14
摘要： The present invention provides a panoramic imaging apparatus capable of obtaining a clear tomographic image even when the rotation speed of a swivel member changes. The clock for driving an FFT CCD device in accordance with the TDI method is set on the basis of the angular speed .omega. of the arm detected by a tachogenerator and a function value f (.theta.) which responds to the rotation angle .theta. of the swivel member detected by an angle detector and used to determine a tomographic orbit. The angle detector is provided with a cam having a shape having been set in accordance with the relationship between the rotation angle .theta. and the film feeding speed at the time of performing X-ray panoramic imaging by using photographic films. The signal of the angular speed .omega. and the signal of the function value f (.theta.) corresponding to the angle .theta. are added by an analog multiplier, and subjected to frequency modulation by a V/F converter to create a TDI clock.
摘要翻译： 本发明提供了即使在旋转构件的转速变化时也能够获得清晰的断层图像的全景成像装置。 根据TDI方法驱动FFT CCD器件的时钟是基于由测速发电机检测到的臂的角速度ω和基于旋转构件的旋转角度θ的函数值f（θ）来设定的 由角度检测器检测并用于确定断层摄影轨道。 该角度检测器设有凸轮，该凸轮具有根据通过使用照相胶片进行X射线全景成像时的旋转角度θ和胶片输送速度之间的关系而设定的形状。 角速度ω的信号和对应于角度θ的函数值f（θ）的信号由模拟乘法器相加，并由V / F转换器进行频率调制以产生TDI时钟。
-
7.发明授权X-ray imaging apparatus and x-ray generation detector for activating the same 失效X射线成像装置和用于激活X射线成像装置的X射线产生检测器
公开(公告)号：US5835554A
公开(公告)日：1998-11-10
申请号：US678341
申请日：1996-07-11
申请人： Masakazu Suzuki , Keisuke Mori , Akifumi Tachibana , Takao Makino
发明人： Masakazu Suzuki , Keisuke Mori , Akifumi Tachibana , Takao Makino
CPC分类号： G01N23/043 , A61B6/145 , A61B6/4233
摘要： An image processor comprises a CPU, a ROM for storing programs and data, a main storage memory for storing image data, parameters for image processing and the like, an image memory for storing image data which are to be displayed on a monitoring device, a DA converter for outputting a signal to the external monitoring device or video printer, a DMA controller, a clock signal generator for driving an imager device such as a CCD sensor, an AD converter for converting an image signal SG from the imager device into a digital signal, an input/output circuit for generating a busy signal to an external X-ray controller and receiving an exposure signal from the X-ray controller, etc.
摘要翻译： 图像处理器包括CPU，用于存储程序和数据的ROM，用于存储图像数据的主存储存储器，用于图像处理的参数等，用于存储要在监视装置上显示的图像数据的图像存储器， DA转换器，用于向外部监视装置或视频打印机输出信号，DMA控制器，用于驱动诸如CCD传感器的成像器装置的时钟信号发生器，用于将来自成像器装置的图像信号SG转换成数字 信号，用于向外部X射线控制器产生忙信号并从X射线控制器接收曝光信号的输入/输出电路等。
-
公开(公告)号：US5640018A
公开(公告)日：1997-06-17
申请号：US598441
申请日：1996-02-08
申请人： Masakazu Suzuki , Keisuke Mori , Akifumi Tachibana , Kazunari Matoba , Hitoshi Asai , Kazuhisa Miyaguchi , Toshitaka Takeguchi
发明人： Masakazu Suzuki , Keisuke Mori , Akifumi Tachibana , Kazunari Matoba , Hitoshi Asai , Kazuhisa Miyaguchi , Toshitaka Takeguchi
摘要： Images are to be satisfactorily continued even at joints of image regions.The surface of a fluorescent screen on which an X-ray image is to be formed is partitioned in the longitudinal direction of a slit, into image regions. From the image regions, image information is guided to CCD imaging elements by optical fiber bundles. Boundaries of the image regions are formed so as to be inclined with respect to the longitudinal direction of a slit.
摘要翻译： 即使在图像区域的关节处，图像也将令人满意地继续。 将要在其上形成X射线图像的荧光屏的表面在狭缝的纵向方向上分隔成图像区域。 从图像区域，通过光纤束将图像信息引导到CCD成像元件。 图像区域的边界形成为相对于狭缝的纵向方向倾斜。
-
公开(公告)号：US5604781A
公开(公告)日：1997-02-18
申请号：US598440
申请日：1996-02-08
申请人： Masakazu Suzuki , Keisuke Mori , Akifumi Tachibana , Kazunari Matoba , Hitoshi Asai , Kazuhisa Miyaguchi , Toshitaka Takeguchi
发明人： Masakazu Suzuki , Keisuke Mori , Akifumi Tachibana , Kazunari Matoba , Hitoshi Asai , Kazuhisa Miyaguchi , Toshitaka Takeguchi
CPC分类号： H04N5/3205 , A61B6/501 , A61B6/585 , H04N5/361 , H04N5/3656 , H05G1/60 , H04N5/32 , Y10S378/901
摘要： The present invention provides an X-ray tomographic imaging apparatus, wherein image degrading components caused by a CCD sensor (3c) or the like are reduced so as to obtain high-quality X-ray images. After tomographic imaging, dark current noise is eliminated by subtracting dark current correction data from a specific line of data among image data stored in an image memory. Next, sensitivity correction coefficients are prepared on the basis of data obtained when an X-ray beam having nearly uniform intensity distribution enters an X-ray imaging device 3. The image data obtained after dark current correction is then multiplied by the sensitivity correction coefficients. As a result, noise due to sensitivity variations or the like can be eliminated.
摘要翻译： 本发明提供一种X射线断层成像装置，其中由CCD传感器（3c）等引起的图像劣化成分减少，以获得高品质的X射线图像。 在断层成像之后，通过从存储在图像存储器中的图像数据中的特定数据线减去暗电流校正数据来消除暗电流噪声。 接下来，基于在具有几乎均匀的强度分布的X射线束进入X射线成像装置3时获得的数据来准备灵敏度校正系数。然后将在暗电流校正之后获得的图像数据乘以灵敏度校正系数。 结果，可以消除由于灵敏度变化等引起的噪声。
-
10.发明授权
公开(公告)号：US5572566A
公开(公告)日：1996-11-05
申请号：US314822
申请日：1994-09-29
申请人： Masakazu Suzuki , Keisuke Mori , Akifumi Tachibana , Takao Makino
发明人： Masakazu Suzuki , Keisuke Mori , Akifumi Tachibana , Takao Makino
CPC分类号： G01N23/043 , A61B6/145 , A61B6/4233
摘要： An image processor comprises a CPU, a ROM for storing programs and data, a main storage memory for storing image data, parameters for image processing and the like, an image memory for storing image data which are to be displayed on a monitoring device, a DA converter for outputting a signal to the external monitoring device or video printer, a DMA controller, a clock signal generator for driving an imager device such as a CCD sensor, an AD converter for converting an image signal SG from the imager device into a digital signal, an input/output circuit for generating a busy signal to an external X-ray controller and receiving an exposure signal from the X-ray controller, etc.
摘要翻译： 图像处理器包括CPU，用于存储程序和数据的ROM，用于存储图像数据的主存储存储器，用于图像处理的参数等，用于存储要在监视装置上显示的图像数据的图像存储器， DA转换器，用于向外部监视装置或视频打印机输出信号，DMA控制器，用于驱动诸如CCD传感器的成像器装置的时钟信号发生器，用于将来自成像器装置的图像信号SG转换成数字 信号，用于向外部X射线控制器产生忙信号并从X射线控制器接收曝光信号的输入/输出电路等。
-
-
-
-
-
-
-
-
-
搜索结果
164 条记录 (耗时 0.028 秒)
