Method and system for the calibration of an x-ray scanner using an
off-centered circular phantom
    1.
    发明授权
    Method and system for the calibration of an x-ray scanner using an off-centered circular phantom 失效
    使用非中心圆形透镜校准X射线扫描仪的方法和系统

    公开(公告)号:US5214578A

    公开(公告)日:1993-05-25

    申请号:US362680

    申请日:1989-06-07

    IPC分类号: A61B6/03 A61B6/00 G06T11/00

    CPC分类号: A61B6/583 G06T11/005

    摘要: A method and system to calibrate an X-ray scanner uses a single circular phantom. The circular phantom is off-centered with respect to the axis of rotation of the scanner so as to introduce different paths in the phantom for each channel, depending on the angular positions of the scanner. This results in different attenuation measurements which are compared with values obtained by the computation of the path lengths which depend on the off-centered coordinates r and .PHI. and on the position of the scanner, thus enabling computation of the polynomial approximation coefficients to be applied to the measurements.

    摘要翻译: 用于校准X射线扫描仪的方法和系统使用单个圆形体模。 圆形体模相对于扫描仪的旋转轴线偏心,以便根据扫描仪的角度位置为每个通道在体模中引入不同的路径。 这导致了不同的衰减测量,其与通过计算取决于偏心坐标r和PHI的路径长度以及扫描仪的位置所获得的值进行比较,从而能够计算要应用到的多项式近似系数 测量。

    X-ray scanning tube with deflecting plates
    2.
    发明授权
    X-ray scanning tube with deflecting plates 失效
    具有偏转板的X射线扫描管

    公开(公告)号:US5125019A

    公开(公告)日:1992-06-23

    申请号:US494444

    申请日:1990-03-16

    IPC分类号: H01J35/06 H01J35/14 H01J35/30

    CPC分类号: H01J35/06 H01J35/14 H01J35/30

    摘要: In an x-ray tube of the beam deflection type for a radiology apparatus, the stair-steps of the focusing device of the electron beam are extended by metallic deflecting electrodes placed in parallel relation to said stair-steps and electrically insulated from these latter by means of insulating layers. Said electrodes are brought to different potentials, the polarities and values of which depend on the direction and amplitude of deflection to be obtained.

    摘要翻译: 在用于放射学装置的光束偏转型的X射线管中,电子束的聚焦装置的台阶由金属偏转电极延伸,金属偏转电极与所述台阶平行地放置并与这些电极电绝缘 绝缘层的手段。 所述电极被带到不同的电位,其极性和值取决于要获得的偏转的方向和幅度。

    Device to control the speed of two-phase or three-phase motors
    3.
    发明授权
    Device to control the speed of two-phase or three-phase motors 失效
    控制两相或三相电机转速的装置

    公开(公告)号:US5105141A

    公开(公告)日:1992-04-14

    申请号:US551888

    申请日:1990-07-12

    申请人: Philippe Ernest

    发明人: Philippe Ernest

    IPC分类号: H05G1/66

    CPC分类号: H05G1/66

    摘要: Disclosed are a device and a method to control the speed of two-phase or three-phase A.C. motors by means of a three-phase converter. The switching-over instants of the switches of the converter for the control of a two-phase motor are computed so that the signals at the common points of each pair of switches are phase shifted with respect to one another and have no low-order harmonic components. The disclosed device and method are applicable to motors driving rotating anodes for X-ray tubes.

    摘要翻译: 公开了一种通过三相转换器来控制两相或三相交流电动机的速度的装置和方法。 计算用于控制两相电机的转换器的开关的切换时刻,使得每对开关的公共点处的信号相对于彼此相移并且不具有低次谐波 组件。 所公开的装置和方法适用于驱动用于X射线管的旋转阳极的电动机。

    Cathode for an X-ray tube and a tube including such a cathode
    4.
    发明授权
    Cathode for an X-ray tube and a tube including such a cathode 失效
    用于X射线管的阴极和包括这种阴极的管

    公开(公告)号:US5031200A

    公开(公告)日:1991-07-09

    申请号:US558447

    申请日:1990-07-27

    IPC分类号: H01J35/06 H01J35/14

    CPC分类号: H01J35/06 H01J35/14

    摘要: The invention relates to X-ray tubes, and more particularly to cathodes for such tubes. The invention lies in the cathode, which includes an electron-emitting filament (26), being made in the form of a main body (10) of insulating material having metal electrodes (16 and 19) deposited thereon which are insulated from one another by the main body. The filament (26) and the electrodes (16 to 19) are connected to conductors (27, 21 to 23) which pass through the main body.

    摘要翻译: 本发明涉及X射线管,尤其涉及这种管的阴极。 本发明在于阴极,其包括电子发射丝(26),其形成为具有沉积在其上的金属电极(16和19)的绝缘材料的主体(10)的形式,其彼此绝缘,所述金属电极彼此绝缘 主体。 灯丝(26)和电极(16〜19)与通过主体的导体(27,21〜23)连接。

    Examination bed for NMR or tomodensitometry apparatus
    5.
    发明授权
    Examination bed for NMR or tomodensitometry apparatus 失效
    核磁共振测定装置

    公开(公告)号:US4944501A

    公开(公告)日:1990-07-31

    申请号:US313976

    申请日:1989-03-09

    CPC分类号: A61B6/0457 A61B5/0555

    摘要: An examination bed, notably for RMN or tomodensitometry, which includes a chassis, an examination plateau, and a mechanism for driving movement of the plateau with respect to the chassis and with respect to the apparatus wherein the moving mechanism includes a moving assembly with respect to the plateau and the chassis, elongated in its shape with one end being movable with respect to the chassis and whose other end is movable with respect to the plateau.

    摘要翻译: PCT No.PCT / FR87 / 00278 Sec。 371日期:1989年3月9日 102(e)1989年3月9日PCT PCT 1987年7月10日PCT公布。 出版物WO88 / 00451 日期:1988年1月28日。一种检查床,特别是用于RMN或者心律测量法,其包括底盘,检查平台和用于驱动平台相对于底盘的运动并相对于其中移动机构 包括相对于平台和底盘的移动组件,其长形形状,其一端可相对于底盘移动,并且其另一端可相对于平台移动。

    Photoconductive detectors of ionizing radiation, and methods of
implementation
    7.
    发明授权
    Photoconductive detectors of ionizing radiation, and methods of implementation 失效
    电离辐射光电探测器及其实施方法

    公开(公告)号:US5051592A

    公开(公告)日:1991-09-24

    申请号:US515865

    申请日:1990-04-27

    申请人: Jacques Trotel

    发明人: Jacques Trotel

    IPC分类号: G01T1/29 H01J47/02

    CPC分类号: G01T1/2935 H01J47/02

    摘要: The invention relates to detectors of ionizing radiation which use a photoconductor as the detecting element. The invention lies in an electrode moving in a direction OX through a photoconductive medium disposed between two grids of electrodes extending parallel to OX. During the irradiation time, the grid electrodes of one grid are raised to a positive potential relative to the electrodes of the other grid and electrons and positive ions are created in the photoconductor. The electrons are removed by maintaining the positive potential on the electrodes of said one grid for a period of time longer than the irradiation. During displacement of said moving electrode, only the positive ions give rise to current in the electrodes. The invention is applicable to radiotherapy and radiography.

    摘要翻译: 本发明涉及使用光电导体作为检测元件的电离辐射检测器。 本发明在于通过设置在两个平行于OX的电极格栅之间的光导介质在OX方向上移动的电极。 在照射时间期间,一个栅格的栅格电极相对于另一个栅极的电极升高到正电位,并且在感光体中产生电子和正离子。 通过将所述一个栅格的电极上的正电位保持比照射更长的时间来去除电子。 在移动电极的位移期间,只有正离子在电极中产生电流。 本发明适用于放射治疗和放射摄影。

    Probe provided with a concave arrangement of piezoelectric elements for
ultrasound apparatus
    8.
    发明授权
    Probe provided with a concave arrangement of piezoelectric elements for ultrasound apparatus 失效
    具有用于超声波装置的压电元件的凹形布置的探针

    公开(公告)号:US5042492A

    公开(公告)日:1991-08-27

    申请号:US368337

    申请日:1989-05-23

    申请人: Patrick Dubut

    发明人: Patrick Dubut

    CPC分类号: G10K11/32

    摘要: In order to make a probe having a concave attack face, a continuous acoustic transition blade (5) is used. Said blade is metallized (7) and is common contact with all the front metallizations (6) of the piezoelectric elements of the probe. The rear metallizations (8) of the elements terminate electrically and independently backwards of the probe. As a result, the electric connection of the piezoelectric elements is simplified. Said probe is usable in experiments with ultrsounds where good focusing is desired.

    摘要翻译: PCT No.PCT / FR87 / 00466 Sec。 371日期1989年5月23日 102(e)日期1989年5月23日PCT提交1987年11月24日PCT公布。 出版物WO88 / 04089 日期:1988年6月2日。为了制造具有凹入攻击面的探针,使用连续的声转变叶片(5)。 所述刀片被金属化(7)并且与探针的压电元件的所有前金属化层(6)共同接触。 元件的后部金属化(8)电连接并独立地从探针的后面终止。 结果,简化了压电元件的电连接。 所述探针可用于需要良好聚焦的超声波实验。

    Echography probe with improved connection circuit
    9.
    发明授权
    Echography probe with improved connection circuit 失效
    回波探头具有改进的连接电路

    公开(公告)号:US5027822A

    公开(公告)日:1991-07-02

    申请号:US368336

    申请日:1989-07-17

    CPC分类号: B06B1/0622 Y10T29/42

    摘要: When making curved bar probes it is necessary, particularly at high frequency, to provide circuits for the connection of piezoelectric elements of the bars which are compatible with the curvature imposed to the bar after it has been fabricated flat. The invention overcomes such difficulty by adjoining on both sides of the elements a generally parallelepipedic relay metallized on at least two (12,13) of its adjacent faces to transpose one connection face (7) situated in plane which must be curved into one connection face (13) which is perpendicular and of which the orientation remains unchanged and parallel to a same plane during the curvature operation. As a result, the connection is simplified.

    摘要翻译: PCT No.PCT / FR87 / 00462 Sec。 371日期:1989年7月17日 102(e)日期1989年7月17日PCT提交1987年11月24日PCT公布。 出版物WO88 / 04090 日期:1988年6月2日。当制造弯曲杆探头时,特别是在高频下,需要提供用于连接杆的压电元件的电路,这些电路在被制造成平坦之后与施加到杆的曲率兼容。 本发明克服了这样的困难,即将元件的两侧邻接在其相邻面的至少两个(12,13)上金属化的大致平行六面体的继电器,以转置位于平面中的一个连接面(7),该连接面必须弯曲成一个连接面 (13),其在弯曲操作期间保持不变并且平行于同一平面。 因此,简化了连接。

    Method for the application of gradient pulses in an imaging experiment
using a nuclear magnetic resonnance machine
    10.
    发明授权
    Method for the application of gradient pulses in an imaging experiment using a nuclear magnetic resonnance machine 失效
    在使用核磁共振机的成像实验中应用梯度脉冲的方法

    公开(公告)号:US4857845A

    公开(公告)日:1989-08-15

    申请号:US180111

    申请日:1988-03-22

    申请人: Eric Breton

    发明人: Eric Breton

    CPC分类号: G01R33/4833

    摘要: Gradient pulses are applied during the common periods and with homothetic shapes on each of three imaging axes of an NMR machine in order to form oblique images. This results in a simplification of programming of the supplies of the gradient pulse application device.

    摘要翻译: PCT No.PCT / FR87 / 00299 Sec。 371日期1988年3月22日 102(e)1988年3月22日PCT Filted 1987年7月28日PCT公布。 出版物WO88 / 01381 日期:1988年2月25日。在共同的周期中施加渐变脉冲,并在NMR机的三个成像轴的每一个上具有同质形状,以形成倾斜图像。 这导致对梯度脉冲施加装置的供给的编程的简化。