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    RADIOTHERAPY APPARATUS
    3.
    发明公开
    RADIOTHERAPY APPARATUS 有权
    放射治疗设备

    公开(公告)号：EP2321009A1

    公开(公告)日：2011-05-18

    申请号：EP09746070.3

    申请日：2009-05-15

    申请人： Elekta AB (PUBL) ,  The Institute of Cancer Research

    发明人： BROWN, Kevin ,  THOMPSON, Maria, Giulia ,  ROBERTS, David, Anthony ,  EVANS, Philip, Mark ,  HANSEN, Vibeke, Nordmark

    IPC分类号： A61N5/10 ,  A61B6/00 ,  A61B6/02

    CPC分类号： A61N5/1049 ,  A61B6/06 ,  A61B6/4042 ,  A61B6/583 ,  A61N2005/1061 ,  G21K1/02 ,  G21K1/10 ,  H01J35/08 ,  H01J2235/081 ,  H01J2235/087

    摘要： It is desirable to achieve a co-incident investigative kV source for a therapeutic MV source - a so-called "beams-eye-view" source. It has been suggested that bremsstrahlung radiation from an electron window be employed; we propose a practical structure for achieving this which can switch easily between a therapeutic beam and a beam-eye-view diagnostic beam capable of offering good image resolution. Such a radiation source comprises an electron gun, a pair of targets locateable in the path of a beam produced by the electron gun, one target of the pair being of a material with a lower atomic number than the other, and an electron absorber insertable into and withdrawable from the path of the beam. In a preferred form, the electron gun is within a vacuum chamber, and the pair of targets are located at a boundary of the vacuum chamber. The lower atomic number target can be Nickel and the higher atomic number target Copper and/or Tungsten. The electron absorber can be Carbon, and can be located within the primary collimator, or within one of a plurality of primary collimators interchangeably locateable in the path of the beam. Such a radiation source can be included within a radiotherapy apparatus, to which the present invention further relates. A flat panel imaging device for this source can be optimised for low energy x-rays rather than high energy; Caesium Iodide-based panels are therefore suitable.

    CT IMAGING APPARATUS AND METHODS
    5.
    发明公开
    CT IMAGING APPARATUS AND METHODS 有权
    CT成像仪器和方法

    公开(公告)号：EP2670308A1

    公开(公告)日：2013-12-11

    申请号：EP11706737.1

    申请日：2011-02-04

    申请人： Elekta AB (PUBL)

    发明人： KNOX, Christopher, Charles ,  WINFIELD, Colin ,  BROWN, Kevin

    IPC分类号： A61B6/03 ,  A61N5/10

    CPC分类号： A61B6/032 ,  A61B6/4233 ,  A61B6/466 ,  A61N2005/1061

    摘要： An apparatus has a patient support, a rotatable gantry supporting a source of imaging radiation, and a radiation detector that operates in a cyclical pattern of an exposure phase followed by a readout phase. For a first detector cycle in which the gantry has a first angle of rotation, the source of radiation is controlled to emit a first radiation beam pulse during the exposure phase, and respective first imaging data is read out during the readout phase. For a second, subsequent detector cycle, it is determined if the gantry has rotated through at least a threshold angular displacement relative to said first angle of rotation, and if so, the source of radiation is controlled to emit a second radiation beam pulse during the exposure phase, and respective second imaging data is read out during the readout phase.

    LINEAR ACCELERATOR
    7.
    发明公开
    LINEAR ACCELERATOR 有权
    直线加速器

    公开(公告)号：EP1859660A1

    公开(公告)日：2007-11-28

    申请号：EP06726365.7

    申请日：2006-03-10

    申请人： Elekta AB (publ)

    发明人： BROWN, Kevin ,  LARGE, Terry, Arthur

    IPC分类号： H05H9/04 ,  H05H7/18

    CPC分类号： H05H7/12 ,  H05H7/18 ,  H05H9/04

    摘要： A linear accelerator comprises a series of accelerating cavities, adjacent pairs of which are coupled via coupling cavities, in which at least one coupling cavity comprises a rotationally asymmetric element that is rotateable thereby to vary the coupling offered by that cavity. A control means for the accelerator is also provided, adapted to control operation of the accelerator and rotation of the asymmetric element, arranged to operate the accelerator in a pulsed manner and to rotate the asymmetric element between pulses to control the energy of successive pulses. A beneficial way of doing so is to rotate the asymmetric element continuously during operation of the linear accelerator. Then, the control means need only adjust the phase of successive pulses so that during the brief period of the pulse, the asymmetric element is 'seen' to be at the required position. The asymmetric element can disposed within an evacuated part of the accelerator and rotated by way of an electromagnetic interaction with parts outside the evacuated part. No parts associated with the drive need therefore pass through the vacuum seal. This could be achieved by providing at least one magnetically polarised member on the asymmetric element and at least one electrical coil outside the evacuated part.

    RADIOTHERAPY APPARATUS
    10.
    发明公开
    RADIOTHERAPY APPARATUS 有权
    放射治疗设备

    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。