公开(公告)号：US11243279B2

公开(公告)日：2022-02-08

申请号：US17042276

申请日：2019-03-26

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Oliver Lips ,  Martinus Bernardus Van Der Mark

IPC: G01R33/36

Abstract: A radio frequency (RF) antenna element with a (de)tuning system, with the RF antenna element having a resonant electrically conductive loop and a (de)tuning system including a photosensitive switching element to (de)tune the resonant electrically conductive loop. The (de)tuning system comprises an injection optical source optically coupled to the photosensitive switching element.

公开(公告)号：US11099249B2

公开(公告)日：2021-08-24

申请号：US16754789

申请日：2018-09-26

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Peter Vernickel ,  Christoph Leussler ,  Ingo Schmale ,  Christian Findeklee ,  Oliver Lips

IPC: G01R33/34 ,  A61B5/055 ,  G01R33/36

Abstract: The present invention is directed to a system comprising a body coil (9) for magnetic resonance imaging and an RF amplifier connected to the body coil (9) for feeding the body coil (9) with an RF signal, wherein the body coil (9) comprises two different ports (21, 22) for feeding the RF signal into the body coil (9), the body coil (9) is provided with a switch for selectively activating only one single port (21, 22) for feeding the RF signal to the body coil (9) at a time, and the two ports (21, 22) are located at different locations of the body coil (9) such that the dependence of the reflected part of the RF signal fed into the body coil (9) from the weight of the examination object (1) to which the body coil (9) is applied is different for the two ports (21, 22). In this way, a possibility for adapting a MRI measurement to different load situations due to different weights of an examination object (1) in an easy and efficient way is provided, thereby providing the possibility for impedance matching of the body coil by selecting the appropriate driven port.

公开(公告)号：US10788559B2

公开(公告)日：2020-09-29

申请号：US15574264

申请日：2016-05-18

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Oliver Lips

IPC: G01R33/56 ,  G01R33/565

Abstract: The invention provides for an instrument (100, 300) comprising: a radio-frequency antenna (102) comprising multiple antenna elements (104); a radio-frequency system (106) comprising independent receive channels for receiving a radio-frequency signal (140) from each of the multiple antenna elements; a memory (130) containing machine executable instructions (160, 162); and a processor (124) for controlling the instrument. Execution of the machine executable instructions causes the processor to: control (200) the radio-frequency system to receive the radio frequency signal from each of the multiple antenna elements; extract (202) a noise signal (142) from the radio frequency signal from each of the multiple antenna elements; calculate (204) a normed signal (144) for each noise signal by applying a mathematical norm to each noise signal; calculate (206) a covariance (146) of the normed signal between each of the multiple antenna elements; calculate (208) a motion signal (148) by summing each covariance of the normed signal; and detect (210) motion of a subject by detecting a motion event (150) in the motion signal.

公开(公告)号：US10705167B2

公开(公告)日：2020-07-07

申请号：US16090282

申请日：2017-04-04

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Oliver Lips ,  Peter Vernickel

IPC: G01R33/36 ,  G01R33/34 ,  G01R33/345

Abstract: A radio frequency transmit system (40) for use in magnetic resonance imaging apparatuses, comprising a radio frequency driver unit (42) including at least a first radio frequency power source (44; 82) and a second radio frequency power source (46; 84), a radio frequency coil arrangement (48) for generating an RF magnetic excitation field B1, and a plurality of switching members (68, 70, 72, 74) electrically connecting the radio frequency power sources (44, 46; 82, 84) to different pairs of drive ports (58, 60, 62, 64) in a first and in at least a second switching status. The first drive port (58) of the first pair of drive ports (58, 60) and the first drive port (62) of the at least second pair of drive ports (62, 64) are arranged spaced by a fixed predetermined angular distance in the azimuthal direction (56) about the center axis (50); and a magnetic resonance imaging system (10) including such radio frequency transmit system (40).

公开(公告)号：US09835697B2

公开(公告)日：2017-12-05

申请号：US14359151

申请日：2012-11-22

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Steffen Weiss ,  Oliver Lips ,  Bernd David

IPC: G01R33/28

CPC classification number: G01R33/288

Abstract: An RF-safe interventional or a non-interventional instrument is used during an MR imaging or MR examination of an examination object (A). The instrument is made of or includes at least one longitudinal or elongated electrically conductive element (1, 3), for example, in the form of a conductor or wire or line for feeding electrical signals, or in the form of the instrument itself or a component or a part thereof, which is not provided for feeding electrical signals but is nevertheless electrically conductive. All such elements are subject to RF common mode currents which are induced in the element when the instrument or element is exposed to an RF/MR excitation field generated during MR imaging or MR examination by an MR imaging apparatus. The instrument is made RF-safe by increasing the energy loss of an oscillator which is represented by the conductor (1, 3) by a damping element (4; 6) in order to prevent or limit RF heating of the examination object (A) at or surrounding the conductor (1, 3).

公开(公告)号：US12140650B2

公开(公告)日：2024-11-12

申请号：US17913455

申请日：2021-03-24

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Peter Vernickel ,  Christian Findeklee ,  Christoph Günther Leussler ,  Oliver Lips ,  Ingo Schmale ,  Peter Caesar Mazurkewitz

IPC: G01R33/34 ,  G01R33/54

Abstract: The invention also refers to a flexible coil element for a flexible coil array, for a magnetic resonance imaging apparatus. The invention also refers to a flexible coil array, for a magnetic resonance imaging apparatus, for indicating a loading state of a flexible coil element being positioned on at least one inductive element. The invention also refers to a method for indicating a loading state of a flexible coil element being positioned on at least one inductive element. The flexible coil element is comprised by a flexible coil array, wherein the flexible coil array comprises at least one flexible coil element. Furthermore, the invention refers to a software package comprising instructions for carrying out the method steps.

公开(公告)号：US20230408608A1

公开(公告)日：2023-12-21

申请号：US18035963

申请日：2021-11-12

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Christian Findeklee ,  Christopher Günther Leussler ,  Peter Caesar Mazurkewitz ,  Peter Vernickel ,  Ingo Schmale ,  Oliver Lips

IPC: G01R33/36 ,  G01R33/28

CPC classification number: G01R33/3628 ,  G01R33/288

Abstract: For a radio frequency (RF) receiver system a solution for a safe operation of the radio frequency (RF) receiver system in magnetic resonance imaging shall be ensured. This is achieved by a radio frequency (RF) receiver system for use in a magnetic resonance (MR) imaging system the RF receiver system, wherein the RF receiver system comprises at least one RF receive coil with at least one detune circuit (1). The detune circuit (1) comprises at least a pair of crossed diodes (D1, D2) with an interface, wherein the interface is configured to measure an electrical current in the detune circuit (1) to determine the proper function of the PIN diodes (D1, D2) by measuring the detune direct current for a first detune voltage polarity and for a second reversed detune voltage polarity. The present invention also provides a magnetic resonance (MR) imaging system, a method for ensuring a safe radio frequency (RF) receiver system operation in magnetic resonance imaging, a software package for a magnetic resonance (MR) imaging system, a software package for upgrading a magnetic resonance (MR) imaging system and a computer program product.

公开(公告)号：US11269033B2

公开(公告)日：2022-03-08

申请号：US17046785

申请日：2019-04-02

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Peter Vernickel ,  Ingo Schmale ,  Oliver Lips

IPC: G01R33/3873 ,  G01R33/38

Abstract: The invention relates to a shim iron (130) for use with an magnetic resonance (MR) apparatus (10), wherein the shim iron (130) is comprised of a stack of shim plates (131, 132, 133, 134, 135), wherein at least two of the shim plates (131, 132, 133, 134, 135) comprise slits, the slits forming a respective slit pattern of the slit shim plates (131, 132, 133, 134, 135), and wherein the slit patterns, when viewed from the same viewing direction, are comprised of at least two different slit patterns which may not be brought into congruent coverage with each other. In this way, a shim iron (130) is provided which does not heat up to high temperatures due to eddy currents.

公开(公告)号：US10094895B2

公开(公告)日：2018-10-09

申请号：US14440092

申请日：2013-10-23

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Oliver Lips

IPC: G01R33/36 ,  G01R33/54 ,  H04B1/44

Abstract: A transmit/receive switching circuitry (40; 48) for a magnetic resonance radio frequency antenna (M) for use in an magnetic resonance imaging system (10), the transmit/receive switching circuitry comprising: -a radio frequency input transmission line (TX) provided for transmitting radio frequency power to the magnetic resonance radio frequency antenna (M) and a radio frequency output transmission line (RX) provided for transferring away magnetic resonance signals received by the magnetic resonance radio frequency antenna (M) at a magnetic resonance frequency from the magnetic resonance radio frequency antenna (M);—a parallel resonant circuit (42) with a resonance frequency that is substantially equal to the magnetic resonance frequency, and that is connected in parallel to the magnetic resonance radio frequency antenna (M) with regard to the radio frequency input transmission line (TX),—a series resonant circuit (44) with a resonance frequency that is substantially equal to the magnetic resonance frequency,and that is connected in series between the radio frequency input transmission line (TX) and the radio frequency output transmission line (RX); for providing improved radio frequency isolation between the radio frequency input transmission line (TX) and the radio frequency output transmission line (RX); a method for generating consecutive RF transmit periods and RF receive periods of the magnetic resonance imaging system (10) using such a transmit/receive switching circuitry (40; 48); a switching control unit (32) having at least one such transmit/receive switching circuitry (40; 48), for use in the magnetic resonance imaging system (10); a software module (26) for controlling an execution of such a method.

公开(公告)号：US20150293189A1

公开(公告)日：2015-10-15

申请号：US14440092

申请日：2013-10-23

Applicant: KONINKLIJKE PHILIPS N.V. ,  PHILIPS GMBH

Inventor： Oliver Lips

IPC: G01R33/36 ,  G01R33/54

CPC classification number: G01R33/3664 ,  G01R33/543 ,  H04B1/44

Abstract: A transmit/receive switching circuitry (40; 48) for a magnetic resonance radio frequency antenna (M) for use in an magnetic resonance imaging system (10), the transmit/receive switching circuitry comprising: -a radio frequency input transmission line (TX) provided for transmitting radio frequency power to the magnetic resonance radio frequency antenna (M) and a radio frequency output transmission line (RX) provided for transferring away magnetic resonance signals received by the magnetic resonance radio frequency antenna (M) at a magnetic resonance frequency from the magnetic resonance radio frequency antenna (M);—a parallel resonant circuit (42) with a resonance frequency that is substantially equal to the magnetic resonance frequency, and that is connected in parallel to the magnetic resonance radio frequency antenna (M) with regard to the radio frequency input transmission line (TX),—a series resonant circuit (44) with a resonance frequency that is substantially equal to the magnetic resonance frequency,and that is connected in series between the radio frequency input transmission line (TX) and the radio frequency output transmission line (RX); for providing improved radio frequency isolation between the radio frequency input transmission line (TX) and the radio frequency output transmission line (RX); a method for generating consecutive RF transmit periods and RF receive periods of the magnetic resonance imaging system (10) using such a transmit/receive switching circuitry (40; 48); a switching control unit (32) having at least one such transmit/receive switching circuitry (40; 48), for use in the magnetic resonance imaging system (10); a software module (26) for controlling an execution of such a method.

Abstract translation: 一种用于在磁共振成像系统（10）中使用的磁共振射频天线（M）的发射/接收切换电路（40; 48），所述发射/接收切换电路包括： - 射频输入传输线（TX ），用于向所述磁共振射频天线（M）发射射频功率;以及射频输出传输线（RX），用于将所述磁共振射频天线（M）接收的磁共振信号以磁共振频率 磁共振射频天线（M）; - 具有基本上等于磁共振频率的谐振频率并且与磁共振射频天线（M）并联连接的并联谐振电路（42），并联谐振电路 关于射频输入传输线（TX）， - 具有基本上等于磁通的谐振频率的串联谐振电路（44） 在射频输入传输线（TX）和射频输出传输线（RX）之间串联连接; 用于在射频输入传输线（TX）和射频输出传输线（RX）之间提供改善的射频隔离; 用于使用这样的发射/接收切换电路（40; 48）产生磁共振成像系统（10）的连续RF发射周期和RF接收周期的方法; 具有用于磁共振成像系统（10）中的至少一个这样的发射/接收切换电路（40; 48）的开关控制单元（32）; 用于控制这种方法的执行的软件模块（26）。