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    • 1. 发明授权
    • Laser aligned image guided radiation beam verification apparatus
    • 激光对准图像引导辐射束验证装置
    • US07789561B2
    • 2010-09-07
    • US12032628
    • 2008-02-15
    • Xiaodong WuRicardo Garcia
    • Xiaodong WuRicardo Garcia
    • A61B6/08A61N5/10
    • A61B6/00A61B6/08A61N5/1049A61N2005/105A61N2005/1061
    • A method and apparatus for verifying radiation beam alignment in an image guided stereotactic radiosurgery (SRS) delivery system such as the Cyberknife™. This invention achieves precise verification of radiation beam alignment with a radiation beam detection apparatus mounted on a gimbal assembly. The radiation beam detection apparatus houses an alignment fixture of varying geometric shape, such as a metallic ball or can be an array of radio-opaque markers positioned symmetrically at the gimbal assembly's common rotation center. The radiation detection apparatus comprises a radiation detector such as film and an alignment mirror, which are parallel to each other on opposite sides of the alignment fixture. The radiation detector is used to capture a radiographic image of the alignment fixture and the circular radiation field. The resulting image is analyzed to determine the eccentricity of the radiation field and whether adjustment of node positions is required to eliminate any eccentricity.
    • 一种在诸如Cyber​​knife TM的图像引导立体定向放射外科手术(SRS)递送系统中验证辐射束对准的方法和装置。 本发明实现了与安装在万向节组件上的辐射束检测装置的辐射束对准的精确验证。 辐射束检测装置容纳诸如金属球的不同几何形状的对准夹具,或者可以是对称地位于万向节组件的共同旋转中心处的不透射线标记的阵列。 放射线检测装置包括在对准夹具的相对侧上彼此平行的诸如胶片和对准反射镜的放射线检测器。 辐射检测器用于捕获对准夹具和圆形辐射场的射线照相图像。 分析所得图像以确定辐射场的偏心率,并且是否需要调整节点位置以消除任何偏心。
    • 2. 发明授权
    • Apparatus and method for robotic radiosurgery beam geometry quality assurance
    • 机器人放射外科手术器械和方法几何质量保证
    • US07780349B2
    • 2010-08-24
    • US12006629
    • 2008-01-03
    • Xiaodong Wu
    • Xiaodong Wu
    • A61B6/08A61N5/10
    • A61N5/1048A61B34/20A61B34/25A61B90/10A61B90/39A61B2017/00725A61B2090/101A61B2090/363A61N5/1042
    • A method and apparatus for quality assurance of beam geometry of robotic radiosurgery systems. The apparatus comprises two or more radio-opaque markers set at a fixed distance from each other and contained in a housing, which is assembled to a collimator fixture for attachment to the collimator interface of the LINAC of a robotic radiosurgery system. A treatment plan is generated to position the LINAC to a series of pre-defined radiation beam orientations, then a simulation of the treatment is carried out, and radiographic images are taken at each LINAC position. The coordinates of the radio-opaque markers obtained from the images are used to determine beam orientation by calculating their directional cosines, the beam off-axis error and the deviation of the radiation source to iso-center distance (SAD). The imaging system is independently calibrated and the quantitative beam geometric information is used to adjust beam geometry for quality assurance.
    • 一种用于机器人放射外科系统的束几何质量保证的方法和装置。 该装置包括两个或更多个放射线不透明标记,其彼此固定并且容纳在壳体中,该壳体被组装到准直器夹具上,用于附接到机器人放射外科系统的LINAC的准直器界面。 产生处理计划以将LINAC定位成一系列预定义的辐射束取向,然后进行处理的模拟,并且在每个LINAC位置拍摄放射照相图像。 使用从图像获得的不透射线标记的坐标通过计算它们的方向余弦,光束离轴误差和辐射源与等中心距离的偏差(SAD)来确定波束取向。 成像系统被独立校准,并且定量光束几何信息用于调整光束几何形状以确保质量。
    • 3. 发明授权
    • Integrated half-beam profile measurement and polar profile for circular radiation field symmetry assessment
    • 用于圆形辐射场对称性评估的集成半光束轮廓测量和极化轮廓
    • US07531810B2
    • 2009-05-12
    • US11499380
    • 2006-08-04
    • Xiaodong Wu
    • Xiaodong Wu
    • G01K1/08H01J3/14H01J3/26
    • A61N5/1048
    • A method for routine monitoring and quality assurance of field asymmetry of high energy circular radiation beam producing equipment. The quality assurance process of field symmetry for devices such as stereotactic radiosurgery (SRS) systems is simplified by directly measuring the integration of the half-beam profile. The method of the invention provides that the field symmetry is obtained by positioning the tip of an ion chamber, with a collecting length approximately half the diameter of the beam, at the central axis of the beam, and rotating the ion chamber at varying angular positions, acquiring and comparing readings at desired angular positions. Each pair of readings from positions 180 degrees opposed from each other, are plugged into the equation, Asymmetry=2(R1−R2)/(R1+R2) to compute asymmetry.
    • 一种用于高能圆形辐射束生产设备的场不对称的常规监测和质量保证的方法。 立体定向放射外科(SRS)系统等设备的场对称性的质量保证过程通过直接测量半波束剖面的整合来简化。 本发明的方法提供的是,场对称是通过将离子室的尖端定位在梁的中心轴处的集合长度大约为梁的直径的一半,并且以不同的角位置旋转离子室 ,获取和比较所需角度位置的读数。 将相互对齐180度位置的每对读数插入等式,不对称= 2(R1-R2)/(R1 + R2)以计算不对称性。