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    MR imaging for radiation therapy planning
    1.
    发明授权
    MR imaging for radiation therapy planning 有权

    公开(公告)号：US12245848B2

    公开(公告)日：2025-03-11

    申请号：US17916822

    申请日：2021-04-01

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Steffen Weiss

    IPC: A61B5/055 ,  G01R33/44

    Abstract: The invention relates to a method of MR imaging of a body (10) of a patient positioned in an examination volume of an MR device (1). It is an object of the invention to provide a method that enables geometrically correct MR-only radiation therapy planning at minimum scan times. The method of the invention comprises the following steps: acquiring first MR imaging data representative of at least one region of the body (10); analyzing said first MR imaging data to delineate at least one anatomical structure within said body region; acquiring second MR imaging data of said body region using a multi-point Dixon sequence; deriving a B0 map from said second MR imaging data; analyzing said B0 map to determine at least one low fidelity region of said B0 map; performing B0 mapping to refine the B0 map using a multi-acquisition gradient echo sequence restricted to at least one region where said delineated anatomical structure and said low fidelity region overlap completely or partially; and correcting geometrical distortions in said first and/or second MR imaging data using the refined B0 map. Moreover, the invention relates to a MR device (1) for carrying out the method, and to a computer program to be executed on a MR device (1).

    Method for motion artifact detection
    4.
    发明授权
    Method for motion artifact detection 有权

    公开(公告)号：US11995825B2

    公开(公告)日：2024-05-28

    申请号：US17613101

    申请日：2020-05-25

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Steffen Weiss

    IPC: G06T7/00

    CPC classification number: G06T7/0012 ,  G06T2207/10088 ,  G06T2207/20081 ,  G06T2207/20084

    Abstract: The present disclosure relates to a medical imaging method for motion artifact detection. The method comprises: using (201-203) a k-space acquisition property for generating a motion-corrupted image having a motion artifact as caused by a first initial motion pattern such that the motion artifact is defined as function of a feature matrix and the motion-corrupted image; initializing (205) at least one feature map of a convolutional neural network, CNN, with values of the convolution matrix; training (207) the initialized CNN to obtain, in training images, motion artifacts caused by a second training motion pattern; obtaining (209) a motion artifact in an input image using the trained CNN.

    POSITIONING OF RADIOFREQUENCY COILS IN MAGNETIC RESONANCE IMAGING DEVICES
    6.
    发明公开
    POSITIONING OF RADIOFREQUENCY COILS IN MAGNETIC RESONANCE IMAGING DEVICES 审中-公开

    公开(公告)号：US20230384403A1

    公开(公告)日：2023-11-30

    申请号：US18031170

    申请日：2021-10-25

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Christoph Günther Leussler ,  Steffen Weiss

    IPC: G01R33/34

    CPC classification number: G01R33/34007

    Abstract: The invention relates to a system (1) for magnetic resonance imaging, comprising: a magnetic resonance imaging device (2), and a control unit (3) configured to control the magnetic resonance imaging device (2), wherein the magnetic resonance imaging device (2) comprises a magnetic resonance bore (4), a movable table (5) configured to be movable in and out of the magnetic resonance bore (4), and at least two surface coils (24) comprising coil elements (26), the two surface coils (24) being configured to be adjacently positioned with relative overlap to each other on the movable table (5), such that at least one coil element of a first surface coil overlaps a coil element of a second surface coil. Each of the at least two surface coils (24) comprises an outer cover (25), an inner core (26), which is configured to slide laterally in two dimensions within the outer cover (25), and an actuator (27), the inner core corresponding to the coil elements (26). The control unit (3) comprises a coil element detecting unit (31) configured to detect the at least two coil elements (26), an overlap detecting unit (32) configured to detect the relative overlap (R) of the at least two coil elements (26), a determining unit (33) configured to determine whether the detected relative overlap (R) is within a predefined critical range, and a position adapting unit (34) configured to adapt the relative position of the coil elements (26) by controlling the respective actuators when the detected relative overlap (R) is outside the predefined critical range. The invention further relates to a method (100) for generating images by magnetic resonance imaging as well as a program element.

    ARRANGEMENT AND METHOD FOR DETERMINING THE POSITION OF AN INVASIVE DEVICE
    7.
    发明公开
    ARRANGEMENT AND METHOD FOR DETERMINING THE POSITION OF AN INVASIVE DEVICE 审中-公开

    公开(公告)号：US20230273279A1

    公开(公告)日：2023-08-31

    申请号：US18017889

    申请日：2021-07-09

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Steffen Weiss

    IPC: G01R33/28 ,  A61B6/12 ,  A61B6/00

    CPC classification number: G01R33/285 ,  A61B6/12 ,  A61B6/5247 ,  A61B2034/2061

    Abstract: For the field of determining the position of an invasive device (1) a solution for improving the localization of the invasive device (1) is specified. This is achieved by an arrangement and a method for determining the position of an invasive device (1), wherein an optical shape sensing system for sensing a position and/or shape of the invasive device (1) is provided, wherein the system is arranged to localize at least one point Pi on the invasive device (1) at a position xi, yi, zi, with some en-or margin (2Δxi, 2Δyi, 2Δzi) in a region of interest (3), localizing and reconstructing at least one point Pi on the invasive device (1) at a position xi, yi, zi, with some error margin (2Δxi, 2Δyi, 2Δzi) in a region of interest (3) by the optical shape sensing system. An MRI system is also provided for measuring the position xi, yi, zi of the point Pi on the invasive device (1) within the error margin in the region of interest at least in one spatial direction by the MRI system, wherein a signal of the magnetization in the error margin (2Δxi, 2Δyi, 2Δzi) is read out by the MRI system and a position of the invasive device (1) is determined based on the signal. The position xi, yi, zi, of the point Pi on the invasive device (1) in the region of interest (3) determined by the optical shape sensing system is corrected with the xi, yi, zi, of the point Pi on the invasive device (1) in the region of interest (3) determined by the MRI system by a calculating system to an actual position of the point Pi on the invasive device (1).

    EAR PROTECTION FOR MEDICAL IMAGING
    8.
    发明公开
    EAR PROTECTION FOR MEDICAL IMAGING 审中-公开

    公开(公告)号：US20230172480A1

    公开(公告)日：2023-06-08

    申请号：US17925951

    申请日：2021-05-12

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Steffen Weiss ,  Mark Thomas Johnson

    IPC: A61B5/055 ,  A61F11/08

    CPC classification number: A61B5/055 ,  A61F11/08 ,  A61F11/14

    Abstract: The present disclosure relates to an ear protection system (200) for a medical imaging device. It comprises an ear protection device (210), adapted to be fitted around or in the ears of a patient (P) to be imaged, and at least comprising a first communication interface (211) and at least one sensor device (212) adapted to determine a measurement of noise passing through the ear protection device (210) towards the ears of the patient. The system (200) further comprises a controllable signal emitter (230), adapted to output a proxy signal representing an expected imaging device noise and to be measured by the at least one sensor device (212), and a patient assistance device (220), adapted to assist the patient to fit the ear protection device (210), and at least comprising a second communication interface. During a preparation phase of the patient preceding an imaging phase using the medical imaging device, the ear protection device (210) and the patient assistance device (220) are communicatively connected to each other via the first and second communication interface, and the patient assistance device (220) generates assisting instructions to the patient depending on an evaluation of the proxy signal and the measurement of noise passing through the ear protection device (210) determined by the sensor device (212).

    SYSTEM FOR DETECTION OF RF INDUCED HEATING OF A PATIENT UNDERGOING A MRI EXAMINATION
    9.
    发明公开
    SYSTEM FOR DETECTION OF RF INDUCED HEATING OF A PATIENT UNDERGOING A MRI EXAMINATION 审中-公开

    公开(公告)号：US20230165479A1

    公开(公告)日：2023-06-01

    申请号：US17919782

    申请日：2021-04-26

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Steffen Weiss

    IPC: A61B5/055 ,  A61B5/00

    CPC classification number: A61B5/055 ,  A61B5/0033

    Abstract: The present invention relates to a system (10) for detection of Radio Frequency (RF) induced heating of a patient undergoing a Magnetic Resonance Imaging (MRI) examination. The system comprises a form (20); and a processing unit (30). The form is configured to be placed around at least a part of a patient undergoing a Magnetic Resonance Imaging “MRI” examination in an MRI scanner. The form comprises a material (40), and the form is configured such that the material is in thermal contact with the patient when the form is placed around the at least part of the patient undergoing the MRI examination. The processing unit is configured to receive interrogation data of the material. The processing unit is configured to determine that RF induced heating of the patient has occurred. The determination comprises utilization of the interrogation data.

    Position determination system
    10.
    发明授权
    Position determination system 有权

    公开(公告)号：US10292773B2

    公开(公告)日：2019-05-21

    申请号：US15102784

    申请日：2014-12-08

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Steffen Weiss

    IPC: A61B5/05 ,  A61B34/20 ,  A61B5/055 ,  A61B5/06 ,  A61B6/00 ,  A61B90/00 ,  A61M25/01

    Abstract: At an imaging site an imaging device (14) generates an image of a subject (4) and an imaging light markers generation device (6) generates light markers at locations on a surface of the subject before an interventional procedure is performed. At an interventional site an interventional light markers generation device (17) generates light markers at the locations on the surface of the subject (4) and a localization device (25, 27) determines the position of a catheter during the interventional procedure. A position determination unit (29) then determines the position of the catheter within the pre-interventional image based on the position of the catheter determined by the localization device and provided spatial relations between the devices used for generating the image and the light markers and for localizing the catheter. This allows showing the position of the catheter within the pre-interventional image without necessarily using x-rays.

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