公开(公告)号：EP4249935A1

公开(公告)日：2023-09-27

申请号：EP23163001.3

申请日：2023-03-21

申请人： Siemens Healthcare GmbH ,  CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE - CNRS ,  INSTITUT NATIONAL DE LA SANTE ET DE LA RECHERCHE MEDICALE - INSERM ,  Kings College London ,  The United States of America, as Represented By the Secretary, Department of Health and Human Services ,  Univ Paris XIII Paris-Nord Villetaneuse ,  Université Paris Cité

发明人： DARWISH, Omar ,  NEJI, Radhouene ,  GHARIB, Ahmed M. ,  SINKUS, Ralph

IPC分类号： G01R33/563 ,  A61B5/00 ,  B06B1/18

摘要： A method for synchronizing a rotational eccentric mass of a gravitational transducer used for a magnetic resonance elastography acquisition with a corresponding magnetic resonance elastography scan carried out by a magnetic resonance imaging system, wherein the rotation of the eccentric mass is driven by a shaft, the method comprising the steps:
(a) starting the rotation of the eccentric mass at a set vibration frequency and the magnetic resonance elastography scan at a set acquisition frequency; (b) determining the rotational position of the shaft; (c) defining the determined rotational position as first reference position; (d) calculating further reference positions, wherein the further reference positions may be the same as the first reference position, or may alternate between several positions; (e) at the start time of each subsequent acquisition period, determining the current rotational position of the shaft; (f) comparing the determined current rotational position with the theoretically expected reference position and decreasing or increasing the rotational speed of the rotational eccentric mass based on the comparison.

公开(公告)号：EP4246165A1

公开(公告)日：2023-09-20

申请号：EP23159482.1

申请日：2023-03-01

申请人： Siemens Healthcare GmbH ,  Centre National de la Recherche Scientifique (CNRS) ,  Institut National de la Santé et de la Recherche Médicale (INSERM) ,  Kings College London ,  The United States of America, as represented by the Secretary, Department of Health and Human Services ,  Univ Paris XIII Paris-Nord Villetaneuse ,  Université Paris Cité

发明人： ANNIO, Giacomo ,  MUELLER-REINWALD, Verena ,  SINKUS, Ralph ,  DARWISH, Omar ,  SCHNELL, Wilfried ,  FALKNER, Tamara Elisabeth ,  GHARIB, Ahmed M.

IPC分类号： G01R33/28 ,  G01R33/563 ,  A61B5/00

摘要： The invention relates in one aspect to a motor for a magnetic resonance (MR) tomography room, in another aspect to a patient table for the MR room, in another further aspect to a MR elastography device and in a further aspect to a MR tomography device.
The invention relates in one aspect to a motor for a magnetic resonance (MR) tomography room, wherein a MR tomography device for a MR elastography imaging protocol is arranged within the MR tomography room, comprising:
- a rotational drive for supplying rotational energy to power a MR elastography transducer usable during the MR elastography imaging protocol and
- a support structure,

wherein the rotational drive comprises a terminal for connecting the MR elastography transducer to the rotational drive,
characterized in
a bearing means configured such that the position of the terminal relative to the support structure is adaptable along a trajectory predetermined by the bearing means,
wherein the rotational drive is mounted to the support structure via the bearing means.