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    COMPUTING RADIOTHERAPY DOSE DISTRIBUTION
    2.
    发明公开
    COMPUTING RADIOTHERAPY DOSE DISTRIBUTION 审中-公开

    公开(公告)号：EP3695882A1

    公开(公告)日：2020-08-19

    申请号：EP20157132.0

    申请日：2020-02-13

    申请人： Elekta AB (PUBL)

    发明人： ERIKSSON, Markus ,  SJÖLUND, Jens Olof ,  ÖSTRÖM, Linn ,  TILLY, David Andreas ,  KIMSTRAND, Peter ,  ADLER, Jonas Anders

    IPC分类号： A61N5/10

    摘要： Systems and methods for calculating radiotherapy dose distribution are provided. The systems and methods include operations for receiving data representing at least one of particle trajectories or a dose deposition pattern in a simulated delivery of a radiotherapy plan; applying a dose calculation process to the received data to generate a first radiotherapy dose distribution having a first level of detail; and processing the first radiotherapy dose distribution using a trained machine learning technique to generate a second radiotherapy dose distribution having a second level of detail that enhances the first level of detail.

    RADIOTHERAPY DOSE DISTRIBUTION MEASUREMENT
    4.
    发明公开
    RADIOTHERAPY DOSE DISTRIBUTION MEASUREMENT 审中-公开

    公开(公告)号：EP3315170A3

    公开(公告)日：2018-06-20

    申请号：EP17194941.5

    申请日：2017-10-05

    申请人： Elekta AB (PUBL)

    发明人： Pencea, Corneliu ,  Harasimowicz, Janusz ,  Marinos, Nikolas ,  Byrne, Julian

    IPC分类号： A61N5/10 ,  G01T1/29

    摘要： A method for the measurement of dose distribution in radiotherapy apparatus comprising an apparatus for generating a beam of therapeutic radiation and an imaging apparatus, one or both apparatuses being mounted to a rotatable gantry adapted in use to rotate around a bore of the radiotherapy apparatus and around an isocentre therein, the method comprising: placing a detector holder within a tank, the detector holder comprising a radio-opaque marker and a visual reference point, the marker and the reference point being separated and in a fixed spatial relationship to each other, and the tank in use containing a liquid having a surface level uppermost; locating the tank within the bore such that the detector holder is in the vicinity of the isocentre; rotating the gantry and monitoring the position of the detector holder using the imaging apparatus to determine the position of the marker relative to the isocentre; displacing the detector holder vertically such that the reference point is positioned at a point level with a desired surface level of the liquid, and adding liquid to or removing liquid from the tank until the surface of the liquid is at the same level as the reference point. Features of the detector holder and tank are also described.

    A frame for fixation of equipment to the head of a patient during neurological diagnosis, stereotactic imaging, therapy or surgery
    5.
    发明授权
    A frame for fixation of equipment to the head of a patient during neurological diagnosis, stereotactic imaging, therapy or surgery 有权

    公开(公告)号：EP2868288B1

    公开(公告)日：2018-06-20

    申请号：EP13191077.0

    申请日：2013-10-31

    申请人： ELEKTA AB (publ.)

    发明人： Rurling, Erik ,  Wik, Anna ,  Svensson, Malin ,  Alksnis, Ivars ,  Plantz, Marianne ,  Stavervik, Mathias

    IPC分类号： A61B90/10 ,  A61B90/14

    CPC分类号： A61B90/14 ,  A61B90/11 ,  A61B2017/00911

    摘要： The present invention relates to a frame (1) for fixation of equipment (10) to the head of a patient during neurological diagnosis, therapy or surgery. The frame (1) is adapted to enclose the head of the patient. The frame (1) comprises a number of mounting slots (2) arranged in said frame (1), said mounting slots (2) being adapted to receive a number of fixation pins adapted to fixate said frame (1) to a bone in said head. The frame (1) further comprising two anterior longitudinal posts (3) and two posterior longitudinal posts (4), extending along a longitudinal axis A, an anterior portion (5), adapted to be arranged at the anterior side of the head, said anterior portion (5) interconnecting said two anterior longitudinal posts (3), and a posterior portion (6), adapted to be arranged at the posterior side of the head, said posterior portion (6) interconnecting said two posterior longitudinal posts (4). The anterior longitudinal posts (3) and said posterior longitudinal posts (4) are interconnected with two lateral portions (7), adapted to extend one on each side of said head, and wherein said lateral portions (7) are axially offset, along said longitudinal axis A, with respect to said anterior and posterior portion (5, 6). The present invention further relates to a stereotactic frame system (10) comprising such frame (1).

    PORTAL DOSIMETRY SYSTEM
    7.
    发明公开
    PORTAL DOSIMETRY SYSTEM 审中-公开
    门户剂量测量系统

    公开(公告)号：EP3235542A1

    公开(公告)日：2017-10-25

    申请号：EP17170519.7

    申请日：2014-06-20

    申请人： Elekta AB (publ)

    发明人： WINFIELD, Colin ,  SAYEED, Abdul

    IPC分类号： A61N5/10

    CPC分类号： G06T7/0012 ,  A61N5/1071 ,  A61N2005/1054 ,  G06F17/30259 ,  G06F19/00 ,  G06F19/321 ,  G06F19/3481 ,  G06K9/6202 ,  G06T2207/10004 ,  G06T2207/10116 ,  G16H20/40 ,  G16H30/20 ,  G16H50/20

    摘要： A system for evaluating treatment parameters for a patient undergoing radiotherapy is provided. The system determines a portal dosimetry image (54, 56) showing a difference between a planning image and a portal image (50) both images corresponding to a target region of the patient. The planning image is obtained prior to a radiotherapy treatment session. The portal image (50) is obtained during the radiotherapy treatment session. The system performs a similarity measurement between the portal dosimetry image and prior portal dosimetry images stored in the system. Based on the similarity measurement and the assessments of the prior portal dosimetry images, the system is able to determine when radiation is not being delivered as planned during the radiotherapy treatment session. The system interrupts the radiotherapy treatment session if such determination is made.

    摘要翻译： 提供了用于评估接受放疗的患者的治疗参数的系统。 该系统确定显示对应于患者的目标区域的规划图像和门户图像（50）两个图像之间的差异的门户剂量测定图像（54,56）。 计划图像是在放疗治疗期间之前获得的。 门户图像（50）在放疗治疗期间获得。 系统执行门户剂量测定图像与存储在系统中的先前的门户剂量测定图像之间的相似性测量。 基于相似性测量和先前的门户剂量测定图像的评估，系统能够确定放射治疗期间何时不按计划进行放射。 如果做出这样的决定，系统会中断放疗治疗。

    Dual-energy cone-beam CT scanning
    9.
    发明公开
    Dual-energy cone-beam CT scanning 审中-公开
    双能锥束CT扫描

    公开(公告)号：EP2719332A3

    公开(公告)日：2017-07-26

    申请号：EP13183505.0

    申请日：2013-09-09

    申请人： ELEKTA AB (publ.)

    发明人： Williams, Malcolm Gertaint Shaw

    IPC分类号： A61B6/00 ,  A61N5/00 ,  A61B6/04 ,  A61B6/03

    摘要： To integrate dual energy CT techniques into a cone-beam CT unit operating as part of a radiotherapy apparatus, we describe a CT scanning apparatus comprising a gantry, rotateable about an axis of rotation, an x-ray source mounted on the gantry at a location offset from the axis of rotation, and capable of emitting x-radiation at a selected one of at least two different x-ray energies, a detector for the x-ray source, mounted opposite the source thereby to detect the x-rays after attenuation by an investigative subject located substantially at the axis of rotation, an angular encoder for detecting an angular position of the gantry, and a control apparatus with control over rotation of the gantry and over operation of the x-ray source, able to receive information from the angular encoder, wherein the control apparatus is arranged to cause a first rotation of the gantry and trigger the x-ray source to emit x-radiation at a first x-ray energy when the angular encoder reports that the gantry is at each of a plurality of predetermined angular locations, and cause a second rotation of the gantry and trigger the x-ray source to emit x-radiation at a second x-ray energy differing from the first x-ray energy when the angular encoder reports that the gantry is at each of the same plurality of predetermined angular locations. An image processing means receives the projection images and reconstructs them into a volumetric image. A support couch is provided for the patient, and to minimise the likelihood of movement artefacts, the support couch comprises a patient immobilisation system such as an evacuatable bead bag, bite post, or stereotactic frames, or the like.

    摘要翻译： 为了将双能CT技术集成到作为放射治疗设备的一部分操作的锥束CT单元中，我们描述了一种CT扫描设备，其包括可围绕旋转轴旋转的机架，安装在机架上的X射线源的位置 偏离旋转轴线并且能够在至少两个不同的x射线能量中的选定的一个处发射x辐射，用于x射线源的探测器，与源相对地安装，从而检测衰减后的x射线 通过基本上位于旋转轴线处的调查对象，检测机架的角度位置的角度编码器，以及控制机架的旋转和X射线源的操作的控制设备，其能够接收来自 所述角度编码器，其中所述控制装置被布置成当所述角度编码器报告所述机架的所述机架时，引起所述机架的第一旋转并且触发所述X射线源以第一X射线能量发射X射线 y在多个预定角度位置中的每一个处，并且引起机架的第二旋转并触发X射线源以不同于第一X射线能量的第二X射线能量发射X射线， 编码器报告机架处于相同的多个预定角度位置中的每一个处。 图像处理装置接收投影图像并将其重建为体积图像。 为患者提供支撑床并为了最小化移动伪像的可能性，支撑床包括患者固定系统，例如可抽空的珠状袋，咬合柱或立体框架等。