利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

136 条记录 (耗时 0.033 秒)

    Image-guided radiotherapy
    91.
    发明授权
    Image-guided radiotherapy 有权

    公开(公告)号：US10022563B2

    公开(公告)日：2018-07-17

    申请号：US15273293

    申请日：2016-09-22

    申请人： Elekta AB (Publ)

    发明人： Per Carlsson

    IPC分类号： A61N5/10 ,  A61B6/03

    摘要： A radiotherapy apparatus comprises a rotatable gantry, supporting a source of therapeutic radiation and a source of diagnostic radiation, the two sources being rotationally (or angularly) spaced apart around a rotation axis of the gantry, with at least one collimator associated with the source of therapeutic radiation and arranged to limit the cross-sectional area of a beam produced by that source, a control means arranged to conduct a treatment fraction using the apparatus by causing the apparatus to i. acquire images of a patient using the source of diagnostic radiation, ii. retain those images at least temporarily, iii. subsequently, after further rotation of the gantry, select a retained image acquired when the source of diagnostic radiation was at a rotational position corresponding to the instantaneous rotational position of the source of therapeutic radiation, and iv. control the beam relative to the patient using information derived from the selected image. The corresponding rotational position is ideally one in which the source of therapeutic radiation is at the same or substantially the same rotational position as was the source of diagnostic radiation at the point in time when the image was acquired. An alternative a radiotherapy apparatus comprises a rotatable gantry supporting a source of therapeutic radiation and a source of diagnostic radiation, at least one collimator associated with the source of therapeutic radiation and arranged to limit the cross-sectional area of a beam produced by that source, a reconstruction means arranged to i. obtain two-dimensional images of a patient using the source of diagnostic radiation, ii. retain those images at least temporarily, iii. apply a recency threshold to the retained images thereby to exclude images less recent than the threshold, iv. select at least three such retained images meeting the recency threshold and reconstruct a CT volume or tomographic image using the selected images, and a control means arranged to conduct a treatment fraction or treatment session using the apparatus, controlling the collimator using information derived from the CT volume.

    RADIOTHERAPY DOSE DISTRIBUTION MEASUREMENT
    92.
    发明申请
    RADIOTHERAPY DOSE DISTRIBUTION MEASUREMENT 审中-公开

    公开(公告)号：US20180117361A1

    公开(公告)日：2018-05-03

    申请号：US15785344

    申请日：2017-10-16

    申请人： Elekta AB (Publ)

    发明人： Corneliu Stefan PENCEA ,  Janus HARASIMOWICZ ,  Nikolas MARINOS ,  Julian Peter David BYRNE

    IPC分类号： A61N5/10

    CPC分类号： A61N5/1075 ,  A61N5/1081 ,  A61N2005/1054 ,  A61N2005/1055 ,  A61N2005/1076 ,  G01T1/29

    摘要： A method for measurement of dose distribution in a radiotherapy apparatus includes providing a detector holder situated at least partially 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; locating the tank within a bore of the radiotherapy apparatus; rotating a gantry and monitoring the position of the detector holder with an imaging apparatus; vertically displacing the detector holder until the reference point is positioned at a desired level, and adding liquid to or removing liquid from the tank until the surface of the liquid is level with the reference point. Features of the detector holder and tank are also described.

    Image-guided radiation therapy
    93.
    发明授权
    Image-guided radiation therapy 有权

    公开(公告)号：US09919166B2

    公开(公告)日：2018-03-20

    申请号：US15301887

    申请日：2015-04-07

    申请人： Elekta AB (Publ)

    发明人： Charis Kontaxis ,  Gijsbert Herman Bol ,  Bas Willem Raaymakers

    IPC分类号： A61N5/10 ,  G21K5/04

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

    摘要： The disclosed systems and methods for Image-Guided Radiation Therapy (IGRT), utilizes 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-optimization, fluence optimization 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.

    Frame for fixation of equipment to the head of a patient during neurological diagnosis, stereotactic imaging, therapy or surgery
    95.
    发明授权
    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：US09827046B2

    公开(公告)日：2017-11-28

    申请号：US14517056

    申请日：2014-10-17

    申请人： ELEKTA AB (PUBL)

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

    IPC分类号： A61B19/00 ,  A61B17/00 ,  A61B90/14 ,  A61B90/11

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

    摘要： A frame for fixation of equipment to the head of a patient during neurological diagnosis, therapy or surgery is adapted to enclose the head of the patient. The frame includes a number of mounting slots arranged in the frame. The mounting slots are adapted to receive a number of fixation pins adapted to fixate the frame to a bone in the head. The frame further includes two anterior longitudinal posts and two posterior longitudinal posts, extending along a longitudinal axis A, an anterior portion, adapted to be arranged at the anterior side of the head, the anterior portion interconnecting the two anterior longitudinal posts, and a posterior portion, adapted to be arranged at the posterior side of the head, the posterior portion interconnecting the two posterior longitudinal posts. The anterior longitudinal posts and the posterior longitudinal posts are interconnected with two lateral portions, adapted to extend one on each side of the head, and wherein the lateral portions are axially offset, along the longitudinal axis A, with respect to the anterior and posterior portion. A stereotactic frame system includes such a frame.

    Radiotherapy and imaging apparatus
    97.
    发明申请
    Radiotherapy and imaging apparatus 审中-公开

    公开(公告)号：US20170281973A1

    公开(公告)日：2017-10-05

    申请号：US15624433

    申请日：2017-06-15

    申请人： Elekta AB (publ)

    发明人： John Allen ,  Duncan Neil Bourne ,  Kevin Brown

    IPC分类号： A61N5/10

    摘要： Radiotherapy apparatus comprises a source of radiation mounted on a chassis, the chassis being rotatable about a rotation axis and the source being adapted to emit a beam of radiation along a beam axis that intersects with the rotation axis; a patient support, moveable along a translation axis; a set of magnetic coils located on either side of the beam, for establishing a magnetic field at the point of intersection, spaced from that point along a first direction; the translation axis, the rotation axis, and the first direction being substantially parallel; and further comprising a multi-leaf collimator fixed in its orientation with respect to the source of radiation, the multi-leaf collimator comprising a plurality of elongate leaves disposed with their longitudinal directions substantially aligned with the first direction and movable in that direction between a withdrawn position in which the leaf lies outside the beam, an extended position in which the leaf projects across the beam and a plurality of intermediate positions therebetween.

    STEREOTACTIC SURGICAL INSTRUMENT
    100.
    发明申请
    STEREOTACTIC SURGICAL INSTRUMENT 审中-公开
    立体外科仪器

    公开(公告)号：US20160166324A1

    公开(公告)日：2016-06-16

    申请号：US14943904

    申请日：2015-11-17

    申请人： ELEKTA AB (PUBL)

    发明人： Markus Nyman ,  Erik Rurling

    IPC分类号： A61B19/00

    CPC分类号： A61B90/11 ,  A61B2017/00477

    摘要： A stereotactic surgical instrument for use in stereotactical therapy and surgery and a coupling mechanism for such an instrument is disclosed. The stereotactic surgical instrument includes a semi-circular arc part and a head frame. The head frame is arranged for fixation to a head of a patient by pins or screws. The arc part includes coupling members shaped as rings arranged at a fixed distance from each other for attaching and locking the arc part to the head frame. The head frame includes support members formed as rings for receiving corresponding coupling members. Each coupling member includes a pivotable clamp element arranged to partly surround a respective support member circumferentially when the arc part is coupled to the head frame. The coupling members include locking elements arranged to receive a tip portion of the respective clamp element and adjustable locking knobs for tightening and locking respective coupling member to respective support member.

    摘要翻译： 公开了一种用于立体定向治疗和手术的立体定向手术器械和用于这种器械的联接机构。 立体定向手术器械包括半圆弧部分和头部框架。 头架布置成通过销或螺钉固定到患者的头部。 弧形部分包括成形为彼此固定距离布置的环的联接构件，用于将弧形部分附接和锁定到头部框架。 头架包括形成为用于接收相应联接构件的环的支撑构件。 每个联接构件包括可枢转的夹紧元件，该可枢转的夹紧元件设置成当弧形部分联接到头部框架时周向地围绕相应的支撑构件。 联接构件包括布置成接收相应的夹紧元件的尖端部分的锁定元件和用于将相应的联接构件紧固并锁定到相应的支撑构件的可调节的锁定旋钮。