公开(公告)号：US10401446B2

公开(公告)日：2019-09-03

申请号：US14905322

申请日：2014-07-15

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Oliver Lips

IPC: G01R33/34 ,  G01R33/36 ,  G01R33/341

Abstract: A radio frequency coil unit (10) for use in a magnetic resonance imaging system, the radio frequency coil unit (10) comprising: at least one electrically insulating substrate (18); at least one radio frequency coil member (12) disposed at a first side (22) of the electrically insulating substrate (18); a first capacitor member (26) disposed at the first side (22) of the electrically insulating substrate (18) and galvanically connected to the at least one radio frequency coil member (12); a second capacitor member (28) disposed at a second side (24) of the electrically insulating substrate (18) which is opposite of the first side (22); wherein the first capacitor member (26) and the second capacitor member (28) at least partially overlap in a direction (20) perpendicular to a surface of the electrically insulating substrate (18); and wherein the at least one radio frequency coil member (12), the first capacitor member (26) and the second capacitor member (28) are part of a radio frequency resonance circuit having a resonance frequency that coincides with the Larmor frequency, which is determined by a magnetic field strength of the magnetic resonance imaging system and the species of nuclei under investigation. The capacitor structure at the second side of the substrate has an integrated resonant loop structure of which the resoance properties are indicative of the capacitor values formed by the overlapping capacitor members.

公开(公告)号：US12222411B2

公开(公告)日：2025-02-11

申请号：US18014563

申请日：2021-06-22

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Tim Nielsen ,  Christoph Günther Leussler ,  Peter Vernickel ,  Oliver Lips

IPC: G01V3/00 ,  G01R33/36 ,  G01R33/58

Abstract: A method of setting an RF operating frequency of an MRI system (1) uses a first reference frequency signal, obtained from a geo-satellite positioning system, as a stable long term frequency reference. A second frequency source (24) is calibrated using the first frequency reference signal and the second frequency reference source (24) is then used as the master clock for the MRI system (1), for setting the RF operating frequency.

公开(公告)号：US12092712B2

公开(公告)日：2024-09-17

申请号：US18009366

申请日：2021-06-18

Applicant: KONINKLIJKE PHILIPS N.V.

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

IPC: G01R33/36

CPC classification number: G01R33/3685

Abstract: The invention relates to a magnetic resonance coil array (30) of a magnetic resonance system having a distributed cable routing realized by a self-compensated radiofrequency choke (10). The magnetic resonance coil array (30) comprises multiple magnetic resonance receive coils (32), an input-output unit (34), and multiple coaxial cables (14) interconnecting the magnetic resonance receive coils (32) with the input-output unit (34). The coaxial cable (14) comprises the self-compensated radiofrequency choke (10). The self-compensated radiofrequency choke (10) allows to replace conventional bulky resonant radiofrequency traps used in conventional magnetic resonance coil arrays and allows implementing the distributed cable routing. The self-compensated radiofrequency choke (10) comprises a choke housing (12) having a toroidal form and the coaxial cable (14), wherein the coaxial cable (14) is wound around the choke housing (12) in a self-compensated winding pattern. The self-compensated winding pattern provides compensation for a B1-excitation field of a magnetic resonance system and eliminates the need for the self-compensated radiofrequency choke (10) to be resonant to the B1-excitation field.

公开(公告)号：US11982722B2

公开(公告)日：2024-05-14

申请号：US17421759

申请日：2020-01-10

Applicant: KONINKLIJKE PHILIPS N.V.

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

IPC: A61B5/05 ,  A61B5/055 ,  G01R33/28 ,  G01R33/341 ,  G01R33/54 ,  G06T7/70 ,  G06T7/80

CPC classification number: G01R33/283 ,  A61B5/055 ,  G01R33/341 ,  G01R33/543 ,  G06T7/70 ,  G06T7/80

Abstract: The invention provides for a magnetic resonance imaging system (100, 300). The magnetic resonance imaging system comprises: a subject support (120) configured for moving a subject between a loading position (121) and an imaging position (200); a receive magnetic resonance imaging coil (114) configured for being placed on the subject; and a light detection system (115) comprising at least one ambient light sensor for measuring light data (144). The light detection system is any one of the following: mounted to the main magnet such that the light data is measured from the imaging zone and mounted to the receive magnetic resonance imaging coil. The execution of the machine executable (140) instructions by a processor (130) cause the processor to: move (500) the subject support from the loading position to the imaging position; acquire (502) the light data using the at least one ambient light sensor when the subject support is in the imaging position; determine (504) if the receive magnetic resonance imaging coil is positioned for acquiring magnetic resonance imaging data using the light data; and provide (506) a signal (146) if the receive magnetic resonance imaging coil is positioned for acquiring the magnetic resonance imaging data.

公开(公告)号：US11519982B2

公开(公告)日：2022-12-06

申请号：US17312967

申请日：2019-12-09

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： George Randall Duensing ,  Sascha Krueger ,  Christian Findeklee ,  Oliver Lips

IPC: G01R33/3415 ,  G01R33/28 ,  G01R33/36

Abstract: A radio frequency (RF) system comprises an RF-array of antenna elements, a regulating arrangement to tune the antenna elements' impedances and a camera system to acquire image information of the RF-array. An analysis module is provided to derive operational settings such as resonant tuning settings, decoupling and impedance matchings of the antenna elements' impedances from the image information. The image information also represents the actual impedances and resonant properties of the RF-array. From the image information appropriate impedance settings can be derived that are the tuning parameters to render the RF-array resonant.

公开(公告)号：US11194000B2

公开(公告)日：2021-12-07

申请号：US16960107

申请日：2019-01-10

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Christoph Leussler ,  Peter Vernickel ,  Oliver Lips ,  Ingo Schmale ,  Daniel Wirtz

IPC: G01R33/3875 ,  G01R33/24 ,  G01R33/34 ,  G01R33/36 ,  G01R33/54 ,  G01R33/56 ,  G01R33/565

Abstract: The invention provides for a magnetic resonance imaging system (100) comprising a radio frequency system (116, 114, 118) configured for acquiring magnetic resonance data (144) from an imaging zone (108). The radio frequency system is configured for sending and receiving radio frequency signals to acquire the magnetic resonance data, wherein the radio frequency system comprises: an elliptical transmission coil (114) configured for generating a B1+ excitation field within the imaging zone; and an active B1 shim coil (118) configured for being placed within the imaging zone, wherein the radio frequency system is configured for suppling radio frequency power to the active B1 shim coil during the generation of the B1+ excitation field by the elliptical transmission coil, wherein the B1 shim coil is configured for shimming the B1+ excitation field within the imaging zone.

公开(公告)号：US11112471B2

公开(公告)日：2021-09-07

申请号：US16479955

申请日：2018-01-30

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Christoph Leussler ,  Oliver Lips

IPC: G01R33/36 ,  G01R33/34

Abstract: The present invention is directed to inductively feeding a RF coil (9) for magnetic resonance imaging (MRI), and in particular to a system comprising a RF coil (9) for magnetic resonance imaging and at least one feeding coil (14) for inductively feeding the RF coil (9) with an RF signal, and further to a method for inductively feeding a RF coil (9) for magnetic resonance imaging with at least one RF signal. According to the invention, in this system, the at least one feeding coil (14) is configured and arranged for feeding the RF signal into a conductive coil element (10) of the RF coil (9) at a first position and at a second position, the first position being different from the second position, wherein the direction of the magnetic field of the RF signal at the first position is different from the magnetic field of the RF signal at the second position. In this way, the invention provides for an inductive RF feeding of a resonator which can be achieved in a compensated way, i.e. the local RF field of the feeding loop can be compensated at distant locations. Moreover, the directions of the magnetic fields can be adapted to the respective direction of the magnetic field surrounding the coil element (10) at the respective feeding location. In this way, the invention enables to improve the power efficiency of an RF coil.

公开(公告)号：US20210063517A1

公开(公告)日：2021-03-04

申请号：US16960107

申请日：2019-01-10

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Christoph Leussler ,  Peter Vernickel ,  Oliver Lips ,  Ingo Schmale ,  Daniel Wirtz

IPC: G01R33/3875 ,  G01R33/565 ,  G01R33/54 ,  G01R33/36 ,  G01R33/34 ,  G01R33/24 ,  G01R33/56

Abstract: The invention provides for a magnetic resonance imaging system (100) comprising a radio frequency system (116, 114, 118) configured for acquiring magnetic resonance data (144) from an imaging zone (108). The radio frequency system is configured for sending and receiving radio frequency signals to acquire the magnetic resonance data, wherein the radio frequency system comprises: an elliptical transmission coil (114) configured for generating a B1+ excitation field within the imaging zone; and an active B1 shim coil (118) configured for being placed within the imaging zone, wherein the radio frequency system is configured for suppling radio frequency power to the active B1 shim coil during the generation of the B1+ excitation field by the elliptical transmission coil, wherein the B1 shim coil is configured for shimming the B1+ excitation field within the imaging zone.

公开(公告)号：US10241163B2

公开(公告)日：2019-03-26

申请号：US14405298

申请日：2013-05-14

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Oliver Lips ,  Falk Uhlemann ,  Volkmar Schulz

IPC: G01R33/345 ,  G01R33/34 ,  G01R33/422 ,  G01R33/48 ,  G01R33/565

Abstract: A TEM resonator system includes at least two TEM resonators, especially in the form of TEM volume coils, and especially for use in an MR imaging system or apparatus for transmitting RF excitation signals and/or for receiving MR signals into/from an examination object or a part thereof, respectively. The TEM resonators are arranged and displaced along a common longitudinal axis, and an intermediate RF shield is positioned in longitudinal direction between the two TEM resonators for at least substantially preventing electromagnetic radiation from emanating from between the first TEM resonator and the second TEM resonator into the surroundings.

公开(公告)号：US10042013B2

公开(公告)日：2018-08-07

申请号：US14378116

申请日：2013-02-01

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Oliver Lips ,  Sascha Krueger ,  Marinus Johannes Adrianus Maria Van Helvoort

IPC: G01V3/00 ,  G01R33/28 ,  G01R33/36 ,  A61M25/01 ,  A61B90/00

Abstract: An active position marker system comprising at least one active position marker (10) and a remote transceiver unit (20) for communicating with the position marker is disclosed. Basically, the position marker (10) comprises a local RF receive coil (11) for receiving MR signals which are excited in a local volume, and a parametric amplifier (14) for amplifying and upconverting the frequency of the received MR signal into at least one microwave sideband frequency signal. This microwave signal is transmitted wirelessly or wire-bound to the transceiver unit for downconverting the same and supplying it to an image processing unit of an MR imaging apparatus.