LOW-FIELD DIFFUSION-WEIGHTED MAGNETIC RESONANCE IMAGING

    公开(公告)号:WO2020028449A1

    公开(公告)日:2020-02-06

    申请号:PCT/US2019/044262

    申请日:2019-07-31

    Abstract: Methods and apparatus for operating a low-field magnetic resonance imaging (MRI) system to perform diffusion weighted imaging, the low-field MRI system including a plurality of magnetics components including a Bo magnet configured to produce a low-field main magnetic field Bo, at least one gradient coil configured to, when operated, provide spatial encoding of emitted magnetic resonance signals, and at least one radio frequency (RF) component configured to acquire, when operated, the emitted magnetic resonance signals. The method comprises controlling one or more of the plurality of magnetics components in accordance with at least one pulse sequence having a diffusion- weighted gradient encoding period followed by multiple echo periods during which magnetic resonance signals are produced and detected, wherein at least two of the multiple echo periods correspond to respective encoded echoes having an opposite gradient polarity.

    TECHNIQUES FOR NOISE SUPPRESSION IN AN ENVIRONMENT OF A MAGNETIC RESONANCE IMAGING SYSTEM

    公开(公告)号:WO2021108216A1

    公开(公告)日:2021-06-03

    申请号:PCT/US2020/061281

    申请日:2020-11-19

    Abstract: Techniques for suppressing noise in an environment of a magnetic resonance (MR) imaging system having at least one primary coil and at least one auxiliary sensor. The techniques involve estimating a transform, that, when applied to noise received by the at least one auxiliary sensor, provides an estimate of noise received by the at least one primary coil. The transform is estimated from data obtained by the at least one primary coil and the least one auxiliary sensor, with the data being weighted prior to estimation to remove or suppress data in regions with a high signal to noise ratio. In turn, the estimated transform may be applied to noise measured by the at least one auxiliary sensor during imaging of a patient, to estimate and suppress noise present in the MR signals received by the at least one primary coil during imaging.

    MEDICAL IMAGING DEVICE MESSAGING SERVICE
    9.
    发明申请

    公开(公告)号:WO2020028228A1

    公开(公告)日:2020-02-06

    申请号:PCT/US2019/043877

    申请日:2019-07-29

    Abstract: A system and method for operating a magnetic resonance imaging system including a magnetics system and a controller located in a same room as the magnetics system and communicatively coupled to at least one communication network. The method includes operating the magnetic resonance system to acquire at least one magnetic resonance image of a patient, and, in response to a triggering event, transmitting, via the at least one communication network, a message including metadata associated with acquisition of the at least one magnetic resonance image and/or results thereof to one or more recipients.

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