公开(公告)号：EP2010287B1

公开(公告)日：2009-08-12

申请号：EP06753425.5

申请日：2006-04-27

申请人： Elekta AB (publ)

发明人： BROWN, Kevin ,  STREAMER, Ralph ,  BOXALL, Paul ,  BOURNE, Duncan

IPC分类号： A61N5/10

CPC分类号： A61N5/103 ,  A61N5/1036 ,  A61N5/1042 ,  A61N5/1047

摘要： 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.

摘要翻译： 放射治疗装置包括能够沿射束轴线发射治疗辐射束的光源，被布置成使光束准直到期望的形状的多叶式准直器，其中所述源能够围绕基本正交的旋转轴线旋转并且与旋转轴线相交 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。 控制装置被设置为接收治疗计划，其中电弧被划分为多个名义弧段，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是恒定的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的弧段所需的总时间来实现，所述多个因子包括MLC叶片从弧段开始时的规定位置移动到弧段结束时的规定位置，a 最大叶片速度，源在最大源旋转速度下从弧段开始到结束的旋转，以最大剂量率每次输送剂量，选择指示最长时间的因子，以及控制设备 使得所选因素在其各自的最大值处运行，并且其余因素以选择为与最长时间匹配的降低速率运行。

公开(公告)号：EP3222322B1

公开(公告)日：2018-09-26

申请号：EP17167798.2

申请日：2012-12-14

申请人： Elekta AB (PUBL)

发明人： BURT, David ,  BOXALL, Paul

IPC分类号： A61N5/10

CPC分类号： A61N5/1071 ,  A61N5/103 ,  A61N5/1048 ,  A61N5/1067 ,  A61N5/1081

摘要： We have found a superior method for dealing with the effects of inertia in a radiotherapy apparatus. We propose to cater for inertia in advance by incorporating inertia factors into an output from a delivery control system which adapts the treatment plan by incorporating the inertia factors, or by including the inertia factors as a constraint in the treatment planning process. Therefore, instead of instructing the machine to make movements which assume perfect inertia-less behaviour by the geometry item and then compensating for this afterwards, the instructions delivered to the geometry items will reflect their inertia behaviour and can therefore be followed very closely. This, in turn, means that a departure from that plan will be correspondingly more likely to indicate an error by the geometry item. It will no longer be routine for errors to arise when a geometry item needs to accelerate or decelerate and thus the error-checking regime need not make allowances for such departures from the intended path. That, in turn, means that the error tolerances can be correspondingly tighter. Those tighter tolerances mean that the error-checking can safely be carried out locally for each component.

公开(公告)号：EP2931368B1

公开(公告)日：2017-07-05

申请号：EP12812558.0

申请日：2012-12-14

申请人： Elekta AB (PUBL)

发明人： BURT, David ,  BOXALL, Paul

IPC分类号： A61N5/10

CPC分类号： A61N5/1071 ,  A61N5/103 ,  A61N5/1048 ,  A61N5/1067 ,  A61N5/1081

公开(公告)号：EP3222322A1

公开(公告)日：2017-09-27

申请号：EP17167798.2

申请日：2012-12-14

申请人： Elekta AB (PUBL)

发明人： BURT, David ,  BOXALL, Paul

IPC分类号： A61N5/10

CPC分类号： A61N5/1071 ,  A61N5/103 ,  A61N5/1048 ,  A61N5/1067 ,  A61N5/1081

摘要： We have found a superior method for dealing with the effects of inertia in a radiotherapy apparatus. We propose to cater for inertia in advance by incorporating inertia factors into an output from a delivery control system which adapts the treatment plan by incorporating the inertia factors, or by including the inertia factors as a constraint in the treatment planning process. Therefore, instead of instructing the machine to make movements which assume perfect inertia-less behaviour by the geometry item and then compensating for this afterwards, the instructions delivered to the geometry items will reflect their inertia behaviour and can therefore be followed very closely. This, in turn, means that a departure from that plan will be correspondingly more likely to indicate an error by the geometry item. It will no longer be routine for errors to arise when a geometry item needs to accelerate or decelerate and thus the error-checking regime need not make allowances for such departures from the intended path. That, in turn, means that the error tolerances can be correspondingly tighter. Those tighter tolerances mean that the error-checking can safely be carried out locally for each component.

摘要翻译： 我们发现了一种用于处理放疗设备中的惯性效应的优良方法。 我们提出通过将惯性因素纳入来自递送控制系统的输出中来提前迎合惯性，所述递送控制系统通过结合惯性因素来调整治疗计划，或者通过在治疗计划过程中包括惯性因素作为约束。 因此，不是指示机器进行假定几何项目具有完美无惯性行为并随后进行补偿的运动，而是传递给几何项目的指令将反映它们的惯性行为，因此可以非常接近地遵循。 这又意味着偏离该计划将相应地更可能指示几何项目的错误。 当几何项目需要加速或减速时，将不再出现错误，因此错误检查机制不需要考虑偏离预定路径的情况。 这反过来又意味着误差容限可以相应更紧。 这些更严格的公差意味着错误检查可以安全地在每个组件的本地执行。

公开(公告)号：EP2931368A1

公开(公告)日：2015-10-21

申请号：EP12812558.0

申请日：2012-12-14

申请人： Elekta AB (PUBL)

发明人： BURT, David ,  BOXALL, Paul

IPC分类号： A61N5/10

CPC分类号： A61N5/1071 ,  A61N5/103 ,  A61N5/1048 ,  A61N5/1067 ,  A61N5/1081

摘要： We have found a superior method for dealing with the effects of inertia in a radiotherapy apparatus. We propose to cater for inertia in advance by incorporating inertia factors into an output from a delivery control system which adapts the treatment plan by incorporating the inertia factors, or by including the inertia factors as a constraint in the treatment planning process. Therefore, instead of instructing the machine to make movements which assume perfect inertia-less behaviour by the geometry item and then compensating for this afterwards, the instructions delivered to the geometry items will reflect their inertia behaviour and can therefore be followed very closely. This, in turn, means that a departure from that plan will be correspondingly more likely to indicate an error by the geometry item. It will no longer be routine for errors to arise when a geometry item needs to accelerate or decelerate and thus the error-checking regime need not make allowances for such departures from the intended path. That, in turn, means that the error tolerances can be correspondingly tighter. Those tighter tolerances mean that the error- checking can safely be carried out locally for each component.

摘要翻译： 我们发现了一种用于处理放疗设备中的惯性效应的优良方法。 我们提出通过将惯性因素纳入来自递送控制系统的输出中来提前迎合惯性，所述递送控制系统通过结合惯性因素来调整治疗计划，或者通过在治疗计划过程中包括惯性因素作为约束。 因此，不是指示机器进行假定几何项目具有完美无惯性行为并随后进行补偿的运动，而是传递给几何项目的指令将反映它们的惯性行为，因此可以非常接近地遵循。 这又意味着偏离该计划将相应地更可能指示几何项目的错误。 当几何项目需要加速或减速时，将不再出现错误，因此错误检查机制不需要考虑偏离预定路径的情况。 这反过来又意味着误差容限可以相应更紧。 这些更严格的公差意味着错误检查可以安全地在每个组件的本地执行。

公开(公告)号：EP2211993B1

公开(公告)日：2011-03-30

申请号：EP07819280.4

申请日：2007-10-24

申请人： Elekta AB (publ)

发明人： BROWN, Kevin ,  STREAMER, Ralph ,  BOXALL, Paul ,  BOURNE, Duncan ,  GIBSON, Christopher, James

IPC分类号： A61N5/10

CPC分类号： A61N5/103 ,  A61N5/1036 ,  A61N5/1042

摘要： 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, wherein the total time required for the arc segment for at least one factor relating to a moving geometry item is the greater of (a) a time required to complete the segment at a continuous defined upper speed for the geometry item and (b) a time required to accelerate the geometry item until it is travelling at the defined upper speed. Generally, the time required to accelerate the geometry item to the defined upper speed will include a time to accelerate the geometry item to that speed, and a further time to accelerate the geometry item beyond that speed and subsequently decelerate it until travelling at that speed.

摘要翻译： 放射治疗装置包括能够沿射束轴线发射治疗辐射束的光源，被布置成使光束准直到期望的形状的多叶式准直器，其中所述源能够围绕基本正交的旋转轴线旋转并且与旋转轴线相交 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。 控制装置被设置为接收治疗计划，其中电弧被划分为多个名义弧段，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是恒定的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的弧段所需的总时间来实现，所述多个因子包括MLC叶片从弧段开始时的规定位置移动到弧段结束时的规定位置，a 最大叶片速度，源在最大源旋转速度下从弧段开始到结束的旋转，以每次最大剂量率递送剂量，选择指示最长时间的因子，以及控制设备 使得所选择的因子在其各自的最大值处操作，并且其余因子以选择为与最长时间匹配的减小的速率操作，其中弧段对于与移动几何形状项目有关的至少一个因子所需的总时间是较大的 （a）以几何项目的连续定义的较高速度完成线段所需的时间，以及（b）加速几何项目直至其在所定义的鞋面上行进所需的时间 速度。 通常，将几何体加速到定义的较高速所需的时间将包括将几何体加速到该速度的时间，以及将几何体加速超过该速度并随后使其减速直到以该速度行进的时间。

公开(公告)号：EP2211993A1

公开(公告)日：2010-08-04

申请号：EP07819280.4

申请日：2007-10-24

申请人： Elekta AB (publ)

发明人： BROWN, Kevin ,  STREAMER, Ralph ,  BOXALL, Paul ,  BOURNE, Duncan ,  GIBSON, Christopher, James

IPC分类号： A61N5/10

CPC分类号： A61N5/103 ,  A61N5/1036 ,  A61N5/1042

摘要： 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, wherein the total time required for the arc segment for at least one factor relating to a moving geometry item is the greater of (a) a time required to complete the segment at a continuous defined upper speed for the geometry item and (b) a time required to accelerate the geometry item until it is travelling at the defined upper speed. Generally, the time required to accelerate the geometry item to the defined upper speed will include a time to accelerate the geometry item to that speed, and a further time to accelerate the geometry item beyond that speed and subsequently decelerate it until travelling at that speed.

公开(公告)号：EP2010287A1

公开(公告)日：2009-01-07

申请号：EP06753425.5

申请日：2006-04-27

申请人： Elekta AB (publ)

发明人： BROWN, Kevin ,  STREAMER, Ralph ,  BOXALL, Paul ,  BOURNE, Duncan

IPC分类号： A61N5/10

CPC分类号： A61N5/103 ,  A61N5/1036 ,  A61N5/1042 ,  A61N5/1047

摘要： 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.