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：EP2225001B1

公开(公告)日：2013-06-19

申请号：EP07819444.6

申请日：2007-10-30

申请人： Elekta AB (PUBL)

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

IPC分类号： A61N5/10

CPC分类号： A61N5/1049 ,  A61N5/1042 ,  A61N5/1067 ,  A61N2005/1061

公开(公告)号：EP2225001A1

公开(公告)日：2010-09-08

申请号：EP07819444.6

申请日：2007-10-30

申请人： Elekta AB (PUBL)

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

IPC分类号： A61N5/10

CPC分类号： A61N5/1049 ,  A61N5/1042 ,  A61N5/1067 ,  A61N2005/1061

摘要： Realtime beam shape adjustment in response to (for example) online CT scanning of a patient during treatment is assisted by the radiotherapy apparatus comprising a source adapted to emit a beam of therapeutic radiation, a collimator for delimiting the radiation beam, the collimator comprising a plurality of leaves arranged alongside each other and be moveable longitudinally so that the tips of the leaves define a variable edge of the collimator, the leaves being mounted on a support that is moveable laterally with respect to the leaves. In this way, movements of the tumour that are perpendicular to the direction of leaf motion can be accommodated by simply moving the collimator bodily so as to accommodate this. It is preferred that the apparatus also includes a control means adapted to receive information as to the location of the target volume, and, on the basis of that information, control the longitudinal positions of the leaves and the lateral position of the support. It is also preferred that the support tilts as it moves laterally along a path. This can be achieved, by example, by bearings that are moveable on suitable guides, or by mounting the support on a plurality of pivot arms of unequal lengths. The lengths of such pivot arms can be adjusted as necessary.

摘要翻译： 响应于（例如）治疗期间患者的在线CT扫描的实时波束形状调整由放射治疗设备辅助，该放射治疗设备包括适于发射治疗辐射束的源，用于限定辐射束的准直器，准直器包括多个 的叶片彼此并排设置并且可纵向移动，使得叶片的尖端限定准直器的可变边缘，叶片安装在可相对于叶片侧向移动的支架上。 以这种方式，通过简单地移动准直器以适应这一点，可以适应垂直于叶运动方向的肿瘤运动。 优选的是，该设备还包括控制装置，该控制装置适于接收关于目标体积的位置的信息，并且基于该信息控制叶片的纵向位置和支撑体的横向位置。 还优选的是，当支撑件沿路径横向移动时，支撑件倾斜。 这可以通过例如可在合适的导轨上移动的轴承或通过将支架安装在多个不同长度的枢转臂上来实现。 这种枢轴臂的长度可以根据需要进行调整。

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.