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    IMAGE GUIDED RADIOTHERAPY
    1.
    发明公开
    IMAGE GUIDED RADIOTHERAPY 有权
    BILDGEFÜHRTESTRAHLENTHERAPIE

    公开(公告)号：EP3104937A1

    公开(公告)日：2016-12-21

    申请号：EP15704494.2

    申请日：2015-02-04

    申请人： Elekta AB (PUBL)

    发明人： CARLSSON, Per

    IPC分类号： A61N5/10

    CPC分类号： A61N5/1082 ,  A61N5/103 ,  A61N5/1049 ,  A61N5/1067 ,  A61N2005/1061

    摘要： A table with 6 degrees of freedom is regarded as essential in order to adjust the patient position to correct for positioning errors and the like. However, this imposes a significant cost, has a redundant axis in a conventional linac treatment system, and adds to the volume of the table. We disclose a way of dealing with rotation of the patient in an axis about which the source has a limited range of rotation, without needing a rotational adjustment of the table. An apparatus comprises a radiotherapy delivery apparatus having a radiation source adapted to emit a beam of radiation and to rotate around at least one axis that intersects with the beam, the rotation being confined to a limited range of rotation, an associated imaging device, and a control means controlling both the source and the imaging device, together with a treatment planning computer that accepts an image of a patient and parameters defining the machine capabilities, and creates a treatment plan based on both, wherein the source is capable of rotation in that axis through a range of at least
    x degrees, and a parameter is passed to the treatment planning computer defining the source's available range as
    x-e where
    e>0 , and the control means is adapted to detect the patient position using the imaging device, determine a rotation
    r of the patient around the axis relative to the image used by the treatment planning computer, and if
    r compensate for the rotation by offsetting the source by a rotation equal to
    r . The limited range of rotation is typically less than 360 degrees although this need not necessarily be the case. An example of the type of radiotherapy apparatus to which this invention is applicable is shown in our earlier patent application WO2005/041774, but it can equally be applied to other types.

    摘要翻译： 公开了一种装置，其包括放射治疗递送装置，该放射治疗递送装置具有用于发射辐射束的辐射源，并且能够围绕通过至少x度的范围的与光束交叉的轴线旋转;成像装置和用于控制源的控制单元 和成像装置。 该装置还包括治疗计划计算机，其被配置为接收患者的第一图像，并且接收限定放射治疗递送装置的操作的参数。 参数包括定义为x-e的源的可用旋转范围，其中e> 0。 治疗计划计算机还被配置为基于接收到的图像和参数来生成患者的治疗计划。 控制单元使用成像装置确定患者位置，确定患者围绕轴线相对于第一图像的旋转r，并且当r

    METHOD OF CALIBRATING A RADIATION THERAPY SYSTEM
    2.
    发明公开
    METHOD OF CALIBRATING A RADIATION THERAPY SYSTEM 有权
    方法用于校准放射治疗系统

    公开(公告)号：EP2111259A1

    公开(公告)日：2009-10-28

    申请号：EP07722824.5

    申请日：2007-02-15

    申请人： Elekta AB (PUBL)

    发明人： CARLSSON, Per

    IPC分类号： A61N5/10

    CPC分类号： A61N5/1049 ,  A61N5/1048 ,  A61N5/1075 ,  A61N5/1084

    摘要： The present invention concerns a method, a system, a measurement tool and computer readable medium for determining a predetermined position of a positioning system in a radiation therapy system comprising a radiation therapy unit relatively a fixed radiation focus point of the radiation therapy unit. The method comprises positioning (73) a diode element, obtaining (75) measurement data at each of a predetermined number of measurement points from a radiation intensity curve, determining (76) a three-dimensional centre coordinate of the obtained coordinates, and determining (76) the predetermined position of a patient positioning unit (20) relatively to a fixed focus point of a radiation unit (10) using the determined three-dimensional centre coordinate.

    METHOD FOR CALIBRATION AND QA
    4.
    发明公开
    METHOD FOR CALIBRATION AND QA 有权
    程序用于校准和QA

    公开(公告)号：EP2701802A1

    公开(公告)日：2014-03-05

    申请号：EP11716924.3

    申请日：2011-04-29

    申请人： Elekta AB (PUBL)

    发明人： CARLSSON, Per

    IPC分类号： A61N5/10

    CPC分类号： G06F19/3412 ,  A61N5/1075 ,  A61N2005/1076 ,  G06F19/3481 ,  G16H40/40

    摘要： The present invention relates to the field of radiation therapy. In particular, the invention concerns a method of calibrating a positioning system in a radiation therapy system comprising a radiation therapy unit having a fixed radiation focus point. The method comprises the steps of: -releasably attaching a calibration tool to the fixation arrangement; -performing an image scanning procedure with the imaging system; -determining a position of the calibration tool in a coordinate system related to the imaging system; and -calculating a position difference between the determined position of the calibration tool in the coordinate system related to the imaging system and a position of the calibration tool in the stereotactic fixation unit coordinate system, thereby determining a relationship between the coordinate system related to the imaging system and the position of the calibration tool in the stereotactic fixation unit coordinate system.

    METHOD OF CALIBRATING A POSITIONING SYSTEM IN A RADIATION THERAPY SYSTEM
    7.
    发明授权
    METHOD OF CALIBRATING A POSITIONING SYSTEM IN A RADIATION THERAPY SYSTEM 有权
    方法用于校准的定位系统，放射治疗系统

    公开(公告)号：EP1868684B1

    公开(公告)日：2008-09-17

    申请号：EP06742570.2

    申请日：2006-04-12

    申请人： Elekta AB (publ)

    发明人： CARLSSON, Per ,  HEDIN, Lars

    IPC分类号： A61N5/10

    CPC分类号： A61N5/1049 ,  A61N5/1084

    摘要： Calibration of a radiation therapy system comprising a radiation unit (10) with a fixed focus point, a fixation unit (50) for fixing a treatment volume in a patient, and a positioning system (20). The positioning system (20) comprises a fixed framework (22), a movable carriage (24) for carrying and moving the entire patient, motor (s), a control system for controlling the motor (s), and at least one engagement point (30, 32) for releasably mounting the fixation unit (50) in fixed engagement with the positioning system (20). A fixation unit coordinate system defined in relation to the fixation unit (50) is provided. Linearity errors for the motional axes of the carriage (24) and the angular offset between the motional axes and the coordinate system is determined, whereby the relationships between the axes of the coordinate system and the motional axes of the positioning system (20) are determined. The positioning system is then mounted in fixed relationship with the radiation therapy unit (10) and the focus point in relation to the positioning system (20) is determined, whereby the relationship between the focus point and the coordinate system is also determined.