利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

283 条记录 (耗时 0.037 秒)

    MRI APPARATUS WITH IMPROVED THERMAL CONTROL SYSTEM AND METHOD FOR OPERATING SAID THERMAL CONTROL SYSTEM
    2.
    发明公开
    MRI APPARATUS WITH IMPROVED THERMAL CONTROL SYSTEM AND METHOD FOR OPERATING SAID THERMAL CONTROL SYSTEM 审中-公开

    公开(公告)号：EP4403945A1

    公开(公告)日：2024-07-24

    申请号：EP23151884.6

    申请日：2023-01-17

    申请人： Esaote S.p.A.

    发明人： IAIA, Paolo ,  PUNZO, Vincenzo ,  SALVO, Giuseppe

    IPC分类号： G01R33/38 ,  G01R33/383

    CPC分类号： G01R33/3804 ,  G01R33/383 ,  G01R33/3806

    摘要： An MRI apparatus with an enhanced thermal control system, the said apparatus comprising:
    - a static magnetic field generation unit with at least two magnetic poles supported one opposed to the other at a predetermined distance by a yoke and forming between them a gantry for housing an object to be imaged;
    - at least one heater for heating the said magnetic poles and/or the said magnetic yoke;
    - one or more temperature sensors measuring the temperature of the at least one pole and/or of the yoke;
    - a thermal control unit, comprising:
    - a processing unit, with a memory in which a control software is loaded or loadable, the said control software being executed or executable by the said processing unit;
    - said processing unit having input ports for receiving the temperature measurement signals from the said one or more temperature sensors;
    - said processing unit having output ports for feeding driving signals to the said at least one heater;
    - the said control software comprising the instructions for configuring the said processing unit to generate the said driving signals of the said at least one heater as a function of the signals related to measured temperatures by the said one or more sensors.
    A method for carrying out thermal control of an MRI apparatus.

    METHOD AND ULTRASOUND SYSTEM FOR SHEAR WAVE ELASTICITY IMAGING
    5.
    发明公开
    METHOD AND ULTRASOUND SYSTEM FOR SHEAR WAVE ELASTICITY IMAGING 审中-公开

    公开(公告)号：EP3569155A1

    公开(公告)日：2019-11-20

    申请号：EP18172549.0

    申请日：2018-05-16

    申请人： Esaote S.p.A.

    发明人： Bini, Giovanni

    IPC分类号： A61B8/08 ,  G01S7/52 ,  A61B8/00

    摘要： Method for shear wave elasticity imaging comprising the following steps:
    a) acquiring B-mode ultrasound images of a target region in a body under examination;
    b) selecting a region of interest inside the said B-mode image;
    c) transmitting a shear wave excitation pulse focalized on an excitation region;
    d) measuring the displacements of a certain number of tracking focal points or depth ranges at different depths positions along each one of a predefined number of laterally staggered tracking lines within the selected region of interest;
    e) determining a curve representing the displacement of the tissue as a function of time at different spatial locations within the region of interest;
    f) determining for each said spatial locations in the region of interest the time of arrival of the shear wave at the said spatial location by setting as the time of arrival of the shear wave as a function of the curve representing the displacement of the tissue as a function of time; g) finding the linear functional relation between the time of arrival and the spatial coordinate in the said lateral direction, i.e. in the direction of propagation of the shear wave perpendicular to the direction of the tracking lines, which linear function best approximates the determined time of arrivals at the positions of the tracking lines along the said lateral direction;
    h) determining the inverse of the velocity of the shear wave in a spatial location as the angular coefficient of the said linear function in a coordinate system representing the time of arrival along the y-coordinate and the position along the lateral direction at which the time of arrival has been recorded on the x-coordinate, i.e. the slope of the straight line representing the said linear function in the said coordinate system,
    and which method further comprises the following steps:
    i) step f) is carried out by considering as time of arrivals the time related to each local maxima of the displacement curve at the corresponding spatial location, and
    j) step g) is carried out by determining the linear function best fitting the said data pairs of local maxima of the displacement and related time of arrival applying a Random Sample Consensus algorithm (RANSAC algorithm).

    METHOD AND SYSTEM FOR PERFORMING RETROSPECTIVE DYNAMIC TRANSMIT FOCUSSING BEAMFORMING ON ULTRASOUND SIGNALS
    8.
    发明公开
    METHOD AND SYSTEM FOR PERFORMING RETROSPECTIVE DYNAMIC TRANSMIT FOCUSSING BEAMFORMING ON ULTRASOUND SIGNALS 审中-公开
    用于在超声信号上执行回波动态发射引起波束成形的方法和系统

    公开(公告)号：EP3263036A1

    公开(公告)日：2018-01-03

    申请号：EP16177117.5

    申请日：2016-06-30

    申请人： Esaote S.p.A.

    发明人： PELLEGRETTI, PAOLO ,  CROCCO, MARCO

    IPC分类号： A61B8/00 ,  G01S7/52 ,  A61B8/08

    CPC分类号： G01S7/52095 ,  A61B8/4461 ,  A61B8/4483 ,  A61B8/5207 ,  A61B8/54 ,  G01S7/52049 ,  G01S7/52077 ,  G01S15/8918 ,  G01S15/8927 ,  G01S15/8977 ,  G01S15/8979 ,  G01S15/8995

    摘要： A method for performing retrospective dynamic transmit focusing beamforming for ultrasound signals,
    the method comprising the steps of:
    a) transmitting a plurality of transmit beams from an array transducer, each transmit beam being centered at a different position along the array and each transmit beam having a width or an aperture encompassing a plurality of laterally spaced line positions, each transmit beam width or aperture overlapping at least partially at least the width or the aperture of the immediately adjacent transmit beam or of more laterally spaced transmit beams;
    b) receiving echo signals with the array transducer;
    c) processing the echo signals received in response to one transmit beam to produce a plurality of receive lines of echo signals at the laterally spaced line positions within the width or the aperture of the transmit beam;
    d) repeating the receiving step b) and the processing step c) for the additional transmit beams of the plurality of transmitted transmit beams of step a);
    e) equalizing the phase shift variance among receive lines at a common line position resulting from transmit beams of different transmit beam positions;
    f) combining echo signals of receive lines from different transmit beams which are spatially related to a common line position to produce image data; and
    g) producing an image using the image data;
    and in which the step e) of equalizing the phase shift is carried out concurrently with in the processing step c) and d).

    摘要翻译： 一种用于对超声信号执行回顾性动态发射聚焦波束形成的方法，所述方法包括以下步骤：a）从阵列换能器发射多个发射波束，每个发射波束集中在沿所述阵列的不同位置处，并且每个发射波束具有 包含多个横向间隔的线位置的宽度或孔径，每个发射波束宽度或孔径至少部分地重叠至少所述直接相邻的发射波束或更横向间隔的发射波束的宽度或孔径; b）用阵列换能器接收回波信号; c）处理响应于一个发射波束接收的回波信号，以在发射波束的宽度或孔径内的横向间隔的线位置处产生多个回波信号的接收线; d）对于步骤a）的多个发射的发射波束的附加发射波束重复接收步骤b）和处理步骤c）; e）均衡由不同发射波束位置的发射波束产生的公共线位置处的接收线之间的相移方差; f）组合来自与公共线位置在空间上相关的不同发射波束的接收线的回波信号以产生图像数据; 和g）使用图像数据产生图像; 并且其中在处理步骤c）和d）中同时执行均衡相移的步骤e）。

    METHOD FOR QUANTIFYING THE ELASTICITY OF A MATERIAL BY ULTRASOUNDS
    9.
    发明公开
    METHOD FOR QUANTIFYING THE ELASTICITY OF A MATERIAL BY ULTRASOUNDS 审中-公开
    用超声波定量材料的弹性的方法

    公开(公告)号：EP3240484A1

    公开(公告)日：2017-11-08

    申请号：EP15823817.0

    申请日：2015-12-29

    申请人： Esaote S.p.A.

    发明人： CARLINI, Davide ,  BIORDI, Fulvio

    IPC分类号： A61B8/00 ,  A61B8/08 ,  G01S7/52

    CPC分类号： A61B8/485 ,  A61B5/0402 ,  A61B8/0825 ,  A61B8/463 ,  A61B8/469 ,  A61B8/5223 ,  A61B8/5276 ,  A61B8/543 ,  G01S7/52022 ,  G01S7/52042 ,  G01S7/52085

    摘要： Method for quantifying the elasticity of a material by ultrasounds, comprising the generation of one acoustic disturbance ultrasound beam (10) for the first excitation point (1), for generating a shear wave (11), a measurement of the shear wave (11) at a plurality of lines of sight placed in a region of interest (2) at different predetermined distances from the first excitation point (1), the calculation of the speed of the measured shear wave (11) and the assessment, by calculation, of a mean stiffness value of the material in the region of interest (2) on the basis of the measured speed of the shear wave (11). In the acquired image (3) a second excitation point (4) is defined, in such a position that the region of interest (2) is interposed between the first excitation point (1) and the second excitation point (4). The method for the second excitation point (4) is carried out, for calculating the speed of the shear wave (11) for the second excitation point (4), and the assessment by calculation of the mean stiffness value is carried out on the basis of the average between the speed of the shear wave measured for the first excitation point (1) and the speed of the shear wave measured for the second excitation point (4).