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    Radiotherapy apparatus with calibration
    1.
    发明授权
    Radiotherapy apparatus with calibration 有权

    公开(公告)号：US11752363B2

    公开(公告)日：2023-09-12

    申请号：US16604904

    申请日：2018-03-27

    Applicant: Elekta Limited

    Inventor： Julian Byrne

    IPC: A61N5/10 ,  A61B6/04 ,  A61B6/00

    CPC classification number: A61N5/1075 ,  A61B6/0407 ,  A61B6/583 ,  A61N5/1049 ,  A61N2005/1054 ,  A61N2005/1055 ,  A61N2005/1076

    Abstract: A radiotherapy apparatus is disclosed, having an imaging system and a therapeutic radiation source, an imageable volume into which therapeutic radiation may be provided, a first imaging means for providing an image resulting from the imaging system and a second imaging means for providing an image resulting from the therapeutic radiation, and a patient support moveable relative to the volume, wherein the patient support is provided with a calibration portion comprising at least one object of a material capable of appearing in the image produced by the first imaging means and at least one object of a material capable of appearing in the image produced by the second imaging means, the at least one object being fixed in a pre-determined position relative to the calibration portion and the calibration portion being fixed in a pre-determined position relative to the patient support, the patient support being moveable so that the at least one object portion may optionally be positioned within or outside the volume.

    IMAGING SYSTEM FOR A RADIOTHERAPY DEVICE
    2.
    发明公开
    IMAGING SYSTEM FOR A RADIOTHERAPY DEVICE 审中-公开

    公开(公告)号：US20230248999A1

    公开(公告)日：2023-08-10

    申请号：US18003809

    申请日：2021-06-30

    Applicant: Elekta Limited

    Inventor： Markus Eriksson ,  Per CARLSSON ,  Stefan LANGEMARK

    IPC: A61N5/10

    CPC classification number: A61N5/1049 ,  A61N2005/1061 ,  A61N2005/1054

    Abstract: Disclosed herein is a radiotherapy device comprising a source of therapeutic radiation and an imaging system, the imaging system comprising a source of imaging radiation and a detector. The imaging system is switchable between a first configuration and a second configuration wherein, in the first configuration, the imaging system is configured to emit a beam of imaging radiation shaped for a first imaging modality toward the detector and, in the second configuration, the imaging system is configured to emit a beam of imaging radiation shaped for a second imaging modality toward the detector. The detector is of a shape formed by at least a first and a second section, the first and second section intersecting one another, wherein the first section is positioned for receiving the beam of imaging radiation for the first imaging modality, and the second section is positioned for receiving the beam of imaging radiation for the second imaging modality.

    IMAGE-GUIDED RADIATION THERAPY
    5.
    发明申请
    IMAGE-GUIDED RADIATION THERAPY 审中-公开

    公开(公告)号：US20180289985A1

    公开(公告)日：2018-10-11

    申请号：US15892126

    申请日：2018-02-08

    Applicant: Elekta AB (Publ)

    Inventor： Charis KONTAXIS ,  Gijsbert Herman BOL ,  Bas Willem RAAYMAKERS

    IPC: A61N5/10

    CPC classification number: A61N5/1067 ,  A61N5/1031 ,  A61N5/1037 ,  A61N5/1038 ,  A61N5/1039 ,  A61N5/1047 ,  A61N5/1049 ,  A61N5/1071 ,  A61N2005/1034 ,  A61N2005/1054 ,  A61N2005/1055 ,  A61N2005/1058

    Abstract: The disclosed systems and methods for Image-Guided Radiation Therapy (IGRT), utilises an iterative approach which adjusts a treatment plan based on inter- or intra-fraction images to improve the accuracy of the radiation delivered during the overall treatment. The prescribed dose of radiotherapeutic radiation is mapped onto the patient's anatomy using an image acquired of the region, which is to be the target for radiotherapeutic radiation. Following beam-angle-optimisation, fluence optimisation and segmentation, the efficiency of delivery of each segment is determined using an objective function, and the segments ranked according to their efficiency. The plan proceeds with the choice of the most efficient segment (or segments) to be delivered first. When this radiation has been delivered, having been tracked to establish its distribution, this delivered distribution can be subtracted from the original prescribed dose and the process repeated so that the delivered radiation gradually converges on the original prescribed dose.

    DETERMINATION OF RADIATION COLLIMATOR COMPONENT POSITION
    8.
    发明申请
    DETERMINATION OF RADIATION COLLIMATOR COMPONENT POSITION 审中-公开

    公开(公告)号：US20180185672A1

    公开(公告)日：2018-07-05

    申请号：US15395852

    申请日：2016-12-30

    Applicant: Sun Nuclear Corporation

    Inventor： Amir Ramezanzadeh Moghadam

    IPC: A61N5/10 ,  G21K1/04

    CPC classification number: A61N5/1064 ,  A61N5/1045 ,  A61N5/1071 ,  A61N5/1075 ,  A61N5/1077 ,  A61N2005/1054 ,  G21K1/046

    Abstract: A system, a method, and a computer program product for determining a position of a collimator component of a radiation delivery device. Starting and ending times of an image generated by the radiation delivery device are synchronized with a radiation treatment plan executed by the radiation delivery device. The starting and ending times define a period of time when the generated image was acquired. Based on the synchronized starting and ending times, a predicted characteristic of the image is compared to a measured characteristic of the corresponding measured image. The predicted characteristic is determined by the radiation treatment plan. Based on the comparison, a position of the collimator component is determined. The determined position of the collimator component is compared to the radiation treatment plan and/or treatment log. The synchronized starting and ending times of the generated image are then adjusted.

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