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    • 4. 发明申请
    • MULTI-LEAF RADIATION ATTENUATOR FOR RADIATION THERAPY WITH VERIFICATION SYSTEM
    • 用于具有验证系统的辐射治疗的多叶辐射衰减器
    • WO1994028974A2
    • 1994-12-22
    • PCT/US1994006487
    • 1994-06-08
    • WISCONSIN ALUMNI RESEARCH FOUNDATION
    • WISCONSIN ALUMNI RESEARCH FOUNDATIONSWERDLOFF, StuartMACKIE, Thomas, RockwellHOLMES, Timothy
    • A61N05/10
    • A61N5/1042A61N5/1048C08F234/02G21K1/04G21K1/046G21K5/04G21K5/10
    • A radiation therapy apparatus includes a compensator with moving leaves to attenuate a radiation beam and a compensator verification system to determine if the attenuating leaves are moving in accordance with desired position signals. Two radiation intensity monitoring chambers, one chamber on either side of a patient within a radiation beam, produce beam fluence data used by a computer to construct radiation absorption images and to evaluate the functionality of the compensator. The absorption image can be used for both radiation dose verification and planning of suitable subsequent therapy sessions. The compensator may include a first plurality of radiation attenuating leaves and a second plurality of radiation attenuating leaves. The first plurality of leaves may be spaced with gaps between adjacent leaves within a radiation beam so that the leaves and the gaps therebetween divide the radiation beam into rays. The second plurality of leaves may be disposed directly under gaps in the first plurality of leaves so that each ray of the beam can be occluded by a leaf in either the first or second plurality. The gaps eliminate interference between leaves; the staggering prevents radiation leakage between leaves. Each leaf, in both groups, may be moved between a first open state on one side of the beam, a closed state within the beam thus occluding one ray of the beam, and a second open state on the other side of the beam.
    • 放射线治疗装置包括具有移动叶片以补偿辐射束的补偿器和补偿器验证系统,以根据期望的位置信号确定衰减叶片是否正在移动。 两个辐射强度监测室,辐射束内患者任一侧的一个腔室产生计算机使用的波束注量数据,以构建辐射吸收图像并评估补偿器的功能。 吸收图像可以用于辐射剂量验证和规划合适的后续治疗会话。 补偿器可以包括第一多个辐射衰减叶和第二多个辐射衰减叶。 第一多个叶片可以与辐射束内的相邻叶片之间的间隙间隔开,使得叶片和其间的间隙将辐射束分成射线。 第二多个叶片可以直接设置在第一多个叶片中的间隙下方,使得束的每个射线可以被第一或第二多个叶片中的叶片遮挡。 差距消除叶间的干扰; 惊人的防止叶片之间的辐射泄漏。 两组中的每个叶片可以在梁的一侧上的第一打开状态之间移动,光束内的闭合状态,从而遮挡一束光束,在光束的另一侧上移动第二打开状态。
    • 7. 发明申请
    • RADIATION THERAPY SYSTEM
    • 辐射治疗系统
    • WO1994028971A2
    • 1994-12-22
    • PCT/US1994006488
    • 1994-06-08
    • WISCONSIN ALUMNI RESEARCH FOUNDATION
    • WISCONSIN ALUMNI RESEARCH FOUNDATIONSWERDLOFF, StuartMACKIE, Thomas, RockwellHOLMES, Timothy
    • A61N05/01
    • A61B6/00A61B6/027A61B6/032A61N5/01A61N5/1042G21K1/04G21K1/046
    • A radiation therapy machine having constrained angular freedom to produce a beam only within a gantry plane. A radiation shield may be stationary and not attached to the gantry or rotating to always block the primary beam. The constrained motion reduces the risk of patient/gantry collision and provides for extremely accurate radiation therapy planning. The therapy machine, so constrained, may include a tomographic imaging system on a single gantry. The two systems cooperate and employ many of the same hardware components to both plan and carry out therapy sessions in which irregularly shaped treatment volumes are accurately irradiated while tissue surrounding those volumes is minimally irradiated. The therapy machine also may include a collimator that changes the width of a fan beam of radiation as a treatment volume of the patient crosses the volume exposed by the beam so as to minimize the irradiation of healthy tissue at the front and back of the tumor. The width of the fan beam may be controlled to treat multiple adjacent, similar slices of the patient at one time reducing the treatment duration.
    • 辐射治疗机具有约束的角度自由度,仅在机架平面内产生束。 辐射屏蔽件可以是静止的并且不附接到台架或旋转以总是阻挡主梁。 受约束的运动减少患者/龙门架碰撞的风险,并提供非常精确的放射治疗计划。 治疗机器受到限制,可以包括在单个机架上的断层成像系统。 两个系统协调并采用了许多相同的硬件组件来规划和执行治疗阶段,其中不规则形状的治疗体积被精确地照射,同时围绕这些体积的组织被最少地照射。 治疗机还可以包括准直器,其随着患者的治疗体积横过由梁暴露的体积而改变辐射束的宽度,以便最小化肿瘤前后的健康组织的照射。 可以控制扇形束的宽度以一次治疗患者的多个相邻的相似切片,从而减少治疗持续时间。