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    • 85. 发明申请
    • RADIOTHERAPEUTIC APPARATUS
    • 放射治疗仪
    • WO2007124760A1
    • 2007-11-08
    • PCT/EP2006/003901
    • 2006-04-27
    • ELEKTA AB (PUBL)BROWN, KevinSTREAMER, RalphBOXALL, PaulBOURNE, Duncan
    • BROWN, KevinSTREAMER, RalphBOXALL, PaulBOURNE, Duncan
    • A61N5/10
    • A61N5/103A61N5/1036A61N5/1042A61N5/1047
    • A radiotherapeutic apparatus comprises a source able to emit a beam of therapeutic radiation along a beam axis, a multi-leaf collimator arranged to collimate the beam to a desired shape, wherein the source is rotateable about a rotation axis that is substantially orthogonal and intersects with the beam axis thereby to describe an arc around that axis, and further comprises a control means able to control the dose/time rate of the source, the rotation speed of the source, and the multi-leaf collimator position. The control means is arranged to receive a treatment plan in which the arc is divided into a plurality of notional arc-segments, and specifying the total dose for the arc-segment and a start and end MLC position. It then controls the source in accordance with that plan over an first arc-segment such that at least one of the rotation speed and dose rate are constant and the multi-leaf collimator changes shape, and a second arc segment such that at least one of the rotation speed and dose rate are constant at a level different to the constant level adopted during the first arc-segment. It achieves this by calculating the total time required for the arc segment for a plurality of factors including an MLC leaf movement from a prescribed position at the start of the arc-segment to a prescribed position at the end of the arc- segment, at a maximum leaf speed, rotation of the source from the start to the end of the arc-segment at a maximum source rotation speed, delivery of the dose at a maximum dose rate per time, selecting the factor dictating the longest time, and controlling the apparatus so that the selected factor operates at its respective maximum and the remaining factors are operated at a reduced rate selected to match that longest time.
    • 放射治疗装置包括能够沿着光束轴发射治疗辐射束的源,多叶准直器,其布置成将光束准直到期望的形状,其中源可绕旋转轴线旋转,旋转轴线基本上正交并与 光束轴由此描述围绕该轴的弧,并且还包括能够控制源的剂量/时间速率,源的旋转速度和多叶准直器位置的控制装置。 控制装置被设置成接收处理计划,其中弧被分成多个概念弧段,并且指定弧段的总剂量以及开始和结束MLC位置。 然后,它根据该计划在第一弧段上控制源,使得旋转速度和剂量率中的至少一个恒定,并且多叶准直器改变形状;以及第二弧段,使得至少一个 旋转速度和剂量率恒定在与第一弧段期间采用的恒定水平不同的水平。 它通过计算多个因素所需的总时间来实现,其包括从弧段开始处的规定位置到弧段末端处的规定位置的MLC叶移动, 最大叶片速度,源以最大源旋转速度从弧段的开始到结束的旋转,以每时间最大剂量率递送剂量,选择规定最长时间的因子,以及控制装置 使得所选择的因子在其各自的最大值下操作,并且剩余因子以选择以匹配最长时间的降低的速率操作。
    • 86. 发明申请
    • SYSTEM AND COMPUTER PROGRAM PRODUCT FOR RADIATION INVERSE TREATMENT PLANNING
    • 用于辐射反转治疗计划的系统和计算机程序产品
    • WO2015193162A1
    • 2015-12-23
    • PCT/EP2015/063008
    • 2015-06-11
    • SWISS SUMMIT SERVICE CENTER SA
    • MARTIN, AndréSALZMANN, Daniel
    • A61N5/10
    • A61N5/1031A61B6/5294A61B6/54A61N5/103A61N5/1038A61N5/1042A61N5/1047A61N5/1071A61N5/1075G01T1/2914G05B2219/33079G06F17/16G06F17/30271
    • The present invention concerns a radiation inverse treatment planning system for a linear accelerator, comprising: - a radiation source, configured for delivering individual dose shots (a j ), each individual dose shot having a predetermined location and incidence angle inside and/or outside a target area, a size and a shape - at least a data bus system (102), - a memory (106) coupled to the data bus system (102), wherein the memory (106) comprises a computer usable program code, and - a processing unit (104) coupled to the data bus system (102), wherein the processing unit (104) is configured to execute the computer usable program code to - pre-compute (10) a set of individual dose shots (a j ), - associate (40) a weight (s j ) to each individual dose shot (a j ), based on one or more constraints (20), characterised in that the processing unit (104) executes the computer usable program code to - find (30) the sparsest subset of individual dose shots, to satisfy said one or more constraints (20).
    • 本发明涉及一种用于线性加速器的辐射反向治疗计划系统,包括: - 辐射源,其被配置用于传送各个剂量射击(aj),每个单独的剂量射击在靶内和/或外部具有预定位置和入射角 区域,大小和形状 - 至少数据总线系统(102), - 耦合到数据总线系统(102)的存储器(106),其中存储器(106)包括计算机可用程序代码,以及 - 处理单元(104),其耦合到所述数据总线系统(102),其中所述处理单元(104)被配置为执行所述计算机可用程序代码以预先计算(10)一组单独剂量镜头(aj), - 基于一个或多个约束(20)将每个单独剂量镜头(aj)的重量(sj)关联(40),其特征在于,所述处理单元(104)执行所述计算机可用程序代码以找到(30) 满足所述一个或多个约束(2 0)。
    • 88. 发明申请
    • DEVICE FOR DETERMINING ILLUMINATION DISTRIBUTIONS FOR IMRT
    • 用于确定IMRT照明分布的装置
    • WO2014191204A1
    • 2014-12-04
    • PCT/EP2014/059807
    • 2014-05-14
    • KONINKLIJKE PHILIPS N.V.PHILIPS GMBH
    • ISOLA, Alfonso AgatinoNEUKIRCHEN, ChristophWEESE, JuergenBAL, Matthieu Frédéric
    • A61N5/10
    • A61N5/1036A61N5/1045A61N5/1047A61N2005/1074
    • The invention relates to a device for determining illumination distributions (18) for IMRT. A layered graph structure is used, which considers which extensions of an illumination distribution along a respective line and thus which illumination distributions are realizable, for determining extensions for the illumination distributions. Moreover, second weights defining fluences of the illumination distributions are determined such that a deviation between a provided fluence map and a fluence map formed by a combination of illumination distributions, which are defined by the respective determined extensions and the respective second weight, is minimized. This determination procedure leads to illumination distributions, which very well correspond to the provided fluence map and which are automatically realizable by the radiation device. This leads to an improved IMRT, wherein a post-processing of the determined illumination distributions for ensuring that the determined illumination distributions are really realizable is not necessarily required.
    • 本发明涉及一种用于确定IMRT的照明分布(18)的装置。 使用分层图结构,其考虑沿着相应行的照明分布的哪些延伸,并且因此考虑哪些照度分布是可实现的,以确定照明分布的扩展。 此外,确定照明分布的通量的第二权重被确定为使得通过由相应的确定的扩展和相应的第二权重定义的由照明分布的组合形成的所提供的注量图与通量密度图之间的偏差被最小化。 该确定过程导致照明分布,其非常对应于所提供的注量图并且可由辐射装置自动实现。 这导致改进的IMRT,其中对确定的确定的照明分布真正可实现的所确定的照明分布的后处理不一定是必需的。