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    • 2. 发明授权
    • Method for tracking a catheter probe during a fluoroscopic procedure
    • 荧光检查过程中跟踪导管探针的方法
    • US5369678A
    • 1994-11-29
    • US906149
    • 1992-06-29
    • Ming-Yee ChiuDavid L. Wilson
    • Ming-Yee ChiuDavid L. Wilson
    • A61B6/12A61M29/02G01N23/04
    • A61B6/542A61B6/06A61B6/487A61M25/104
    • A common application of X-ray fluoroscopy is in monitoring the location of a catheter inside a body. Such catheters may be used for balloon angioplasty, laser ablation, or like procedures that are now often used in place of traditional invasive surgery. Reliable and fast determination of the tip location from the fluoro images using the digital image processing technique is required. The present invention relates to a method for tracking a catheter probe or similar object during a fluoroscopic procedure as may be utilized, for example, in conjunction with apparatus and methods that confine full X-ray dosage to a central area, compensating for the reduced X-ray dosage in the peripheral areas by computer imaging enhancement.
    • X射线透视的常见应用是监测导管在体内的位置。 这样的导管可用于球囊血管成形术,激光消融或类似的手术,其现在经常用于代替传统的侵入性手术。 需要使用数字图像处理技术可靠和快速地确定来自荧光图像的尖端位置。 本发明涉及一种用于在荧光镜检查过程中跟踪导管探针或类似物体的方法,例如可结合将全X射线剂量限制在中心区域的装置和方法,补偿减少的X 通过计算机成像增强在周边地区的射线剂量。
    • 6. 发明授权
    • Apparatus and method for reducing X-ray dosage during a fluoroscopic
procedure
    • 在荧光镜检查过程中减少X射线剂量的装置和方法
    • US5278887A
    • 1994-01-11
    • US906148
    • 1992-06-29
    • Ming-Yee ChiuDavid L. Wilson
    • Ming-Yee ChiuDavid L. Wilson
    • A61B6/06G21K1/10G21K3/00
    • G21K1/10A61B6/06A61B6/12
    • The present invention is an apparatus and method for reducing the dosage of X-rays during a fluoroscopic procedure wherein a filter member is used to selectively attenuate the X-ray radiation striking a patient's body. The filter member allows unattenuated X-rays to image an area of interest selected by a physician, thus producing a high intensity, low noise image. However, the areas surrounding the area of interest are imaged with attenuated radiation producing a less intense, more noisy image. A real-time image processing system is used to compensate the image brightness and to potentially filter the compensated region so as to reduce noise. Image quality is thus restored so that a physician can orient the location of a procedure, within a patient's body, and have perspective to the position of area of interest relative to its surroundings.
    • 本发明是一种用于在荧光镜检查过程中减少X射线剂量的装置和方法,其中使用过滤器构件来选择性地衰减穿过患者身体的X射线辐射。 过滤构件允许未衰减的X射线成像由医师选择的感兴趣区域,从而产生高强度,低噪声图像。 然而,围绕感兴趣区域的区域用减弱的辐射成像,产生不太强烈,更嘈杂的图像。 使用实时图像处理系统来补偿图像亮度并且可能对补偿区域进行滤波以便降低噪声。 因此,图像质量被恢复,使得医师可以定位在患者身体内的过程的位置,并且具有与感兴趣区域相对于其周围环境的位置的透视。
    • 8. 发明授权
    • Method and apparatus for editing abdominal CT angiographic images for
blood vessel visualization
    • 用于编辑腹部CT血管造影图像用于血管可视化的方法和装置
    • US5570404A
    • 1996-10-29
    • US315524
    • 1994-09-30
    • Cheng-Chung LiangAjit SinghMing-Yee ChiuJay EzrielevRichard FislerDietmar Hentschel
    • Cheng-Chung LiangAjit SinghMing-Yee ChiuJay EzrielevRichard FislerDietmar Hentschel
    • A61B6/00G06T5/00A61B6/03
    • A61B6/504G06T7/0012G06T7/0081G06T2207/10081G06T2207/30101Y10S378/901
    • A method for automatically editing a plurality of CT image slices to provide a three dimensional view of a selected object located within a patient's body comprises providing at least one slab of CT image slices produced by CT scanning system and computing a top MIP image of the slab. An undesirable object is automatically removed from the top MIP image by first detecting all the pixels having illuminating intensity values which represent the undesirable object. Then all the pixels of the object to be removed are set to a substantially zero illuminating intensity value in order to remove the object from the top MIP image of the slab. After the undesirable object is removed from the top MIP image, the edits made thereto are applied to each CT image slice in the slab. The present invention also includes apparatus for performing a 3D reconstruction of CT angiographic images to visualize a selected object located within a patient's body. The apparatus comprises an x-ray tube for projecting energy into a layer of interest in the patient's body and a detector for detecting changes in the projected energy as it exits the layer of interest. The changes detected in the projected energy are indicative of various objects including the selected object that are located within the layer of interest of the patient's body. Moreover, the x-ray tube and detector operate in conjunction to provide at least one slab of CT image slices.
    • 一种用于自动编辑多个CT图像切片以提供位于患者体内的所选对象的三维视图的方法包括提供由CT扫描系统产生的至少一个CT图像切片并计算平板的顶部MIP图像 。 通过首先检测具有表示不需要的物体的照明强度值的所有像素,从顶部MIP图像自动地去除不需要的物体。 然后将要去除的对象的所有像素设置为基本为零的照明强度值,以便从板的顶部MIP图像中移除物体。 在从MIP顶部图像移除不需要的物体之后,对其进行的编辑被应用于板坯中的每个CT图像切片。 本发明还包括用于执行CT血管造影图像的3D重建以使位于患者身体内的所选对象可视化的装置。 该装置包括用于将能量投射到患者体内感兴趣的层中的X射线管,以及用于检测投射能量离开感兴趣层时的能量变化的检测器。 在投影能量中检测到的变化表示包括位于患者身体的感兴趣层内的所选对象的各种对象。 此外,X射线管和检测器联合工作以提供至少一个CT图像片的平板。
    • 9. 发明授权
    • Optical system for inspecting printed circuit boards wherein a ramp
filter is disposed between reflected beam and photodetector
    • 用于检查印刷电路板的光学系统,其中在反射光束和光电检测器之间设置斜坡滤波器
    • US4677302A
    • 1987-06-30
    • US717973
    • 1985-03-29
    • Ming-Yee ChiuEdward J. Devinney, Jr.
    • Ming-Yee ChiuEdward J. Devinney, Jr.
    • H05K13/08G01N21/86
    • H05K13/08
    • A beam (2) of collimated light is directed towards a printed circuit board (4). The light beam is displaced as reflected from a point of incidence in a path including surfaces having different heights above the printed circuit board when detected at an angle oblique to the surface. From the variation of displacement which is portional to height, the overall profile of the circuit board including components present thereon is determined along the path (56) or line (64) the beam is incident. Various photodetectors (14) are utilized and the addition of a ramp filter (58) enables a single cell integrating photodetector to provide an output intensity indicative of the displacement. An arrangement (FIG. 11) is presented for compensating for variations in surface reflectivity using normalization or feedback.
    • 准直光束(2)被引向印刷电路板(4)。 当以与倾斜于表面的角度检测时,光束在包括印刷电路板上方具有不同高度的表面的路径中从入射点反射移位。 沿着位移到高度的位移的变化,沿着波束入射的路径(56)或线(64)确定包括存在于其上的分量的电路板的整体轮廓。 使用各种光电检测器(14),并且增加斜坡滤波器(58)使得单个电池积分光电检测器能够提供指示位移的输出强度。 提出了一种布置(图11),用于使用归一化或反馈来补偿表面反射率的变化。
    • 10. 发明授权
    • Fingerprint sensing device for deriving an electric signal
    • 用于导出电信号的指纹感测装置
    • US4428670A
    • 1984-01-31
    • US317401
    • 1981-11-02
    • Hartwig RuellEdward J. Devinney, Jr.Ming-Yee Chiu
    • Hartwig RuellEdward J. Devinney, Jr.Ming-Yee Chiu
    • A61B5/117G06K9/00G01N21/17
    • A61B5/1172G06K9/00013
    • The fingerprint sensor derives an electric output signal in accordance with the topographic relief of the finger under investigation. The sensor incorporates a contact body which is formed at least in part by a light-transparent elastic material. The contact body, preferably a flat sensor plate made of said elastic material and attached to a flat supporting plate, has a light receiving surface and a contact surface for receiving a contact pressure by the finger. Before an investigation process is started, the contact surface is smooth. By pressing the finger against the contact surface, the contact surface will attain a shape conforming to the fingerprint pattern of the finger. The sensor also incorporates a light source, a photodetector and an optical system. The light source obliquely passes light to the contact surface which reflects a light beam modulated in accordance with the fingerprint. The optical system passes the reflected light beam to the light sensitive area of the photodetector. In the optical path between finger and photodetector is included a light stop for blocking reflected light which does not contain fingerprint information.
    • 指纹传感器根据被调查的手指的地形浮雕得出电输出信号。 该传感器包括至少部分由透光弹性材料形成的接触体。 接触体,优选地由所述弹性材料制成并且附接到平坦支撑板的平板传感器板具有光接收表面和用于接收手指的接触压力的接触表面。 调查过程开始之前,接触面平滑。 通过将手指压靠在接触表面上,接触表面将获得符合手指指纹图案的形状。 该传感器还包括光源,光电检测器和光学系统。 光源将光反射到反射根据指纹调制的光束的接触表面。 光学系统将反射光束传递到光电检测器的光敏区域。 在手指和光电检测器之间的光路中包括用于阻挡不含指纹信息的反射光的光停止。