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    FMRI IMAGING
    83.
    发明公开
    FMRI IMAGING 审中-公开

    公开(公告)号：US20230333183A1

    公开(公告)日：2023-10-19

    申请号：US17997636

    申请日：2021-05-07

    Applicant: Stichting Katholieke Universiteit

    Inventor： David Norris

    IPC: G01R33/46 ,  G01R33/48 ,  G01R33/561

    CPC classification number: G01R33/4616 ,  G01R33/4806 ,  G01R33/4828 ,  G01R33/5615

    Abstract: The invention provides a method for performing a magnetic resonance measurement of an element in a target region, wherein the element has a magnetic resonance excitation spectrum peak with a linewidth LR, wherein the method comprises a measurement cycle (100) comprising: a magnetization transfer stage (110) comprising providing a plurality of pulses (115) of first radiation to the target region, wherein the plurality of pulses (115) are selected to provide a net pulse having a net pulse angle αN≤1°, and wherein the first radiation comprises a first frequency spectrum peak having a first linewidth LF, wherein the first frequency spectrum peak at least partially overlaps with the magnetic resonance excitation spectrum peak, and wherein LF>5*LR; an excitation stage (130) comprising providing a radio frequency pulse to the target region, wherein the radio frequency pulse excites the element resulting in a transverse magnetization of the element; and a measurement stage (140) comprising detecting a signal from the element, wherein the measurement stage (140) is temporally arranged at an echo time TE after the radio frequency pulse, wherein the echo time TE is smaller than a transverse relaxation time of the element in the target region.

    Noise reduction in image data
    88.
    发明授权
    Noise reduction in image data 有权

    公开(公告)号：US10902562B2

    公开(公告)日：2021-01-26

    申请号：US16300091

    申请日：2017-05-15

    Applicant: Stichting Katholieke Universiteit

    Inventor： Ewoud Joris Smit ,  Wolfgang Mathias Prokop

    IPC: G06K9/00 ,  G06T5/00 ,  G06T5/50 ,  G06T5/20 ,  G06T7/20

    Abstract: A system for filtering an input image dataset is disclosed. A plurality of sequences of input signal values, wherein each sequence corresponds to a different attribute, wherein an input signal value is associated with an attribute and a sampling point i. At least one processor 4 is configured to control computing an output signal value corresponding to a sampling point and an attribute. For a particular sampling point i and for each of a plurality of different attributes of the set of attributes, associating a weight to an input signal value based on a similarity between the signal value and for a plurality of the sampling points j excluding the sampling point i. Also the system computes a weighted sum based on the input signal values and weights. The attribute is a location or a frequency.

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