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    MAGNETIC RESONANCE IMAGING APPARATUS AND CONTROL METHOD OF MAGNETIC RESONANCE IMAGING APPARATUS
    2.
    发明公开
    MAGNETIC RESONANCE IMAGING APPARATUS AND CONTROL METHOD OF MAGNETIC RESONANCE IMAGING APPARATUS 审中-公开

    公开(公告)号：EP4439107A1

    公开(公告)日：2024-10-02

    申请号：EP24164186.9

    申请日：2024-03-18

    申请人： FUJIFILM Healthcare Corporation

    发明人： GOTO, Tomohiro

    IPC分类号： G01R33/567

    CPC分类号： G01R33/5676 ,  G01R33/5673

    摘要： An object is to improve data acquisition efficiency in imaging using both electrocardiogram gating and respiratory motion gating.
    A respiratory movement is monitored during imaging to detect the start of a respiratory stable period (expiration). After an R wave is detected, it is confirmed that the respiratory movement immediately before the R wave detection transitions to the respiratory stable period, and a main measurement is performed at a timing at which a cardiac time phase and a respiratory time phase of a subject are matched with each other, to acquire image data. The cardiac time phase for acquiring the image data is fixed, and a slice position of the main measurement is adjusted by using a respiratory movement displacement acquired immediately before the cardiac time phase fixation. As a result, the image data for two heartbeats can be acquired in a respiratory period after the entrance into the stable period while suppressing an influence of body movement.

    DETECTION OF MIS-TRIGGERING IN HEART MRI
    4.
    发明公开
    DETECTION OF MIS-TRIGGERING IN HEART MRI 审中-公开

    公开(公告)号：EP4321893A1

    公开(公告)日：2024-02-14

    申请号：EP22190216.6

    申请日：2022-08-12

    申请人： Siemens Healthineers AG

    发明人： Kunze, Karl-Philipp ,  Neji, Radhouene

    IPC分类号： G01R33/567

    摘要： The invention relates to a method for processing a plurality of cardiac MR data sets where the plurality of cardiac MR data sets which were acquired over a plurality of cardiac cycles are provided, each cardiac MR data set having a corresponding time stamp at which the corresponding cardiac MR data set was acquired, wherein each of the cardiac MR data sets was acquired based on a trigger event. A series of time differences is determined between the acquisitions of the cardiac MR data sets based on the time stamps, and a default time difference representing the time difference between 2 consecutive cardiac MR data sets is determined which were acquired using correct trigger events. In the time differences, at least one pair of incorrect time differences is determined in the series of time differences, each incorrect time difference representing the time difference between 2 consecutive MR data sets in which at least one MR data set from the 2 consecutive MR data sets was acquired using an incorrect trigger event. Approved MR data sets are determined comprising only cardiac MR data sets from the plurality of cardiac MR data sets which were acquired using the correct trigger event, based on the at least one pair of incorrect time differences and the approved MR data sets are further processed.

    MAGNETIC RESONANCE IMAGING APPARATUS AND IMAGING POSITION DETERMINATION METHOD
    7.
    发明公开
    MAGNETIC RESONANCE IMAGING APPARATUS AND IMAGING POSITION DETERMINATION METHOD 审中-公开

    公开(公告)号：EP4283322A1

    公开(公告)日：2023-11-29

    申请号：EP23174467.3

    申请日：2023-05-22

    申请人： FUJIFILM Healthcare Corporation

    发明人： IKEGAWA, Ayaka ,  GOTO, Tomohiro

    IPC分类号： G01R33/54 ,  G01R33/565 ,  G01R33/567

    摘要： A technique for automatically setting an imaging position is provided, considering a respiratory motion of a subject, thereby reducing a user's burden and enabling robust imaging against variation of an organ position. Using a scout image acquired over at least one cycle of a periodic motion of the subject, the imaging position for a main imaging is determined according to imaging conditions. At this time, a predetermined tissue is extracted from the scout image, and multiple imaging ranges are calculated, including a minimum imaging range that embraces the tissue and a maximum imaging range that embraces a range where the tissue is displaced within the cycle of the periodic motion. Then, according to the imaging conditions, any of the imaging ranges is determined as the imaging position. When the periodic motion is a respiratory motion, the imaging conditions include a breathing method designated by the user, and the imaging range is selected based on thus designated breathing method, and the imaging position (slice position) is automatically set.

    COMPUTER-IMPLEMENTED METHOD FOR PARAMETRIZING A MAGNETIC RESONANCE MEASUREMENT SEQUENCE OR SUPPORTING THE PLANNING OF THE MAGNETIC RESONANCE MEASUREMENT SEQUENCE, MEDICAL IMAGING DEVICE, COMPUTER PROGRAM AND COMPUTER-READABLE STORAGE MEDIUM
    9.
    发明公开
    COMPUTER-IMPLEMENTED METHOD FOR PARAMETRIZING A MAGNETIC RESONANCE MEASUREMENT SEQUENCE OR SUPPORTING THE PLANNING OF THE MAGNETIC RESONANCE MEASUREMENT SEQUENCE, MEDICAL IMAGING DEVICE, COMPUTER PROGRAM AND COMPUTER-READABLE STORAGE MEDIUM 审中-公开

    公开(公告)号：EP4235201A1

    公开(公告)日：2023-08-30

    申请号：EP22158588.8

    申请日：2022-02-24

    申请人： Siemens Healthcare GmbH

    发明人： Stich, Manuel ,  Rupp, Dominik

    IPC分类号： G01R33/54 ,  G01R33/56 ,  G01R33/563 ,  G01R33/567 ,  A61B6/00

    摘要： Computer-implemented method for either parametrizing a measurement sequence (49) or for determining output data to support the planning of the measurement sequence (49), wherein the measurement sequence (49) comprises an acquisition of image data at multiple positions (4, 5, 6), comprising the steps of:
    - repeatedly acquiring a respective primary image data set (14) while the table (7) is arranged in a primary position (4) until a primary trigger condition (16) is fulfilled, wherein a primary timing information (17) concerning the time of the acquisition of the primary image data set (14) for which the primary trigger condition (16) was fulfilled is registered,
    - using an actuator (13) to change the position (4, 5, 6) after the primary trigger condition (16) was fulfilled,
    - repeatedly acquiring a respective secondary image data set (18) while the table (7) is positioned in the secondary position (6),
    - on the one hand evaluating a secondary trigger condition (19, 20) and registering a secondary timing information (21, 22) and/or on the other hand registering a respective temporal evolution of an image property (15) in the sequence of the secondary image data sets (18), and
    - determining at least one parameter value (23) to parametrize the measurement sequence (49) and/or the output data based on the primary timing information (17) and on the secondary timing information (21, 22) and/or the registered temporal evolution.