X-ray image pick-up method
    81.
    发明公开
    X-ray image pick-up method 失效
    Röntgenbild-Aufnahmeverfahren。

    公开(公告)号:EP0460752A1

    公开(公告)日:1991-12-11

    申请号:EP91201341.4

    申请日:1991-05-31

    申请人: Fujisaki, Yukio

    发明人: Fujisaki, Yukio

    CPC分类号: H05G1/60 G03B42/02 H04N5/32

    摘要: An X-ray image pick-up method causes X-rays from an X-ray source to be irradiated on an object for picking up its image as passed through a filter capable of restricting any fluctuation in effective X-ray energy within ±10%, and then the X-rays thus penetrated through the object to be picked up by an image pick-up means. Radiation dose with respect to patients as the object and eventually to doctors or X-ray operators is thereby minimized, while the image pick-up can be realized with a high resolution.

    摘要翻译: X射线摄像方法使得X射线源的X射线被照射到物体上,以通过能够将有效X射线能量的任何波动限制在+/- 10%,然后X射线穿过物体被摄像装置拾取。 因此,作为对象的患者和最终对医生或X射线操作者的辐射剂量被最小化,而可以以高分辨率实现图像拾取。

    X-RAY LENS AND COLLIMATOR
    82.
    发明公开
    X-RAY LENS AND COLLIMATOR 失效
    X射线镜头和收缩镜

    公开(公告)号:EP0419518A4

    公开(公告)日:1991-10-16

    申请号:EP89906637

    申请日:1989-05-02

    发明人: SHARNOFF, MARK

    摘要: This invention relates to design and fabrication of broad-band X-ray focussing devices useful in lithographic production of structures of submicron dimension. Such as those employed in integrated electronic circuits. The designs given here exploit the diffractibility of X-radiation by obstacles and apertures (Figure 1), specifically in the Fresnel or nearfield regime. Devices are described that concentrate at least twofold the intensity of white incident X-radiation whose bandwidth may exceed one octave (Figure 6). Their fabrication requires no methods not already in wide use.

    Filter for gamma-ray camera
    84.
    发明公开
    Filter for gamma-ray camera 失效
    过滤fammastrahlungskamera。

    公开(公告)号:EP0279476A1

    公开(公告)日:1988-08-24

    申请号:EP88200124.1

    申请日:1988-01-26

    IPC分类号: G21K1/10 G01T1/164 G21K3/00

    CPC分类号: G21K1/10 G01T1/1648

    摘要: An alloy filter (16) in the form of a plate made from a homogeneous alloy comprising 85-95 wt.% cadmium and 5-15 wt.% copper is interposed between a collimator (12) and sodium iodide crystal (18) of a gamma camera. The alloy filter improves image resolution by allowing the passage only of emissions (A,C) which impinge substantially perpendicularly on the collimator, while filtering out others (B,D) which impinge obliquely.

    摘要翻译: 由包含85-95重量%镉和5-15重量%铜的均匀合金制成的板形合金过滤器(16)置于准直仪(12)和碘化钠晶体(18)之间, 伽马相机。 合金过滤器通过仅使基本上垂直于准直器照射的排放物(A,C)通过,同时过滤掉倾斜撞击的其他物体(B,D)来提高图像分辨率。

    DIGITALLY CONTROLLED X-RAY BEAM ATTENUATION METHOD AND APPARATUS
    85.
    发明公开
    DIGITALLY CONTROLLED X-RAY BEAM ATTENUATION METHOD AND APPARATUS 失效
    设备用于制造X射线束补偿掩模和方法,用于对象的X射线图像的补偿。

    公开(公告)号:EP0148213A1

    公开(公告)日:1985-07-17

    申请号:EP84902395.0

    申请日:1984-05-31

    IPC分类号: G21K3 A61B6 G21K1 G21K5 H05G1

    CPC分类号: G21K1/10 H05G1/26 H05G1/60

    摘要: Des masques de compensation de rayons X (51) sont préparés en exposant un objet cible (43), tel qu'un patient, à un premier faisceau de rayons X. Le flux de rayons X provenant du patient est reçu par un récepteur d'image électronique (44) qui produit un signal de sortie indiquant l'intensité des rayons X dans toutes les positions du champ d'image. Les informations d'image sont converties par un processeur d'image (47) en des valeurs transformées d'intensité de rayons X pour une pluralité de "pixels" qui couvrent le champ d'image. Un contrôleur de production de masque (48) détermine la valeur minimale d'intensité transformée pour chaque pixel, attribue à chaque pixel un nombre d'atténuation qui est proportionnel à la différence entre la valeur d'intensité transformée pour le pixel et la valeur minimale d'intensité transformée, et envoie des signaux de commande à un dispositif de formage de masque (49) qui dépose sur un substrat non-atténuateur (50) des masques d'atténuation selon une matrice bidimensionnelle de pixels, l'épaisseur de la masse dans chaque pixel étant proportionnelle au nombre d'atténuation. Lorsque le masque (51) est inséré dans le faisceau provenant de la source de rayons X (41), et lorsqu'on procède à une deuxième exposition, le flux de rayons X traversant aussi bien le masque atténuateur (51) que le patient (43) est sensiblement égalisé sur tout le champ d'image.

    Spinning filter for X-ray apparatus
    86.
    发明公开
    Spinning filter for X-ray apparatus 失效
    Rotorerender过滤器Rürntgenapparat。

    公开(公告)号:EP0059382A1

    公开(公告)日:1982-09-08

    申请号:EP82101253.1

    申请日:1982-02-19

    摘要: Curved x-ray filter elements are arranged circularly around a drum (40). Alternate circumferentially adjacent elements have different attenuation properties. Diametrically opposite elements have the same properties. An x-ray source (11) provides a sequence of alternate low and high energy x-ray beam pulses. A multicell x-ray detector (18) produces x-ray attenuation data for each pulse and the data is switched to altemate memories (1, 2). A drum drive motor (55) 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 (40). 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 (95). The signals are used to synchronize the low and high energy x-ray pulses, the filter elements angular locations and memory switching with power line frequency.

    摘要翻译: 弯曲的x射线过滤器元件围绕鼓(40)圆周布置。 交替的周向相邻元件具有不同的衰减特性。 直径相对的元件具有相同的特性。 x射线源(11)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(18)产生每个脉冲的X射线衰减数据,并将数据切换到交替存储器(1,2)。 鼓驱动电机(55)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(40)。 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(95)。 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存储器与电源线频率的切换。