公开(公告)号：US20230258749A1

公开(公告)日：2023-08-17

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：US11047940B2

公开(公告)日：2021-06-29

申请号：US16629587

申请日：2018-07-12

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Christian Findeklee ,  Christoph Leussler

IPC: G01R33/385 ,  G01R33/54 ,  G01R33/36

Abstract: The present invention provides a passive radio frequency (RF) shim resonator (144) for field homogenization of an RF field emitted by an RF antenna device (140) of a magnetic resonance (MR) imaging system (110), whereby the passive RF shim resonator (144) has a first resonating capability and a second resonating capability, and the passive RF shim resonator (144) comprises a switching device, whereby the switching device is adapted to switch between the first and the second resonating capability in accordance with a TX-mode and a RX-mode of the RF field emitted by the RF antenna device (140) of the MR imaging system (110). The present invention further provides a patient bed (142) or a patient mattress for use in a magnetic resonance imaging (MRI) system (110), whereby the patient bed (142) or the patient mattress comprises an above passive RF shim resonator (144). The present invention further provides a RF antenna device for generating and/or receiving a RF field for use in a MRI system (110), whereby the RF antenna device (140) comprises a coil housing and an above passive RF shim resonator (144), wherein the passive RF shim resonator (144) is located within the coil housing. The present invention also provides a magnetic resonance (MR) imaging system (110), comprising an above patient bed (142) or patient mattress or at least one above RF antenna device (140).

公开(公告)号：US10539636B2

公开(公告)日：2020-01-21

申请号：US15568523

申请日：2016-04-25

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Christian Findeklee

IPC: G01R33/36 ,  G01R33/561 ,  G01R33/28

Abstract: A multi-channel transmit/receive radio frequency (RF) system for a magnetic resonance examination system with an RF antenna array includes multiple antenna elements and an RF power supply to supply electrical RF power to the antenna elements. Directional couplers are circuited between respective antenna elements and a power distributor. A monitoring module is configured to measure forward electrical wave amplitude(s) and reflected electrical wave amplitude(s) at individual directional couplers. An arithmetic module is configured to compute individual coil element currents on the basis of the measured forward and reflected electrical wave amplitudes.

公开(公告)号：US10060994B2

公开(公告)日：2018-08-28

申请号：US14439137

申请日：2013-10-23

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Christian Findeklee ,  Christoph Leussler

IPC: G01V3/18 ,  G06F3/041 ,  G01R33/34 ,  G01R33/3415 ,  G01R33/345 ,  G01R33/561 ,  G01R33/565

CPC classification number: G01R33/34076 ,  G01R33/34046 ,  G01R33/34092 ,  G01R33/3415 ,  G01R33/3453 ,  G01R33/5612 ,  G01R33/5659

Abstract: A radio frequency (RF) antenna device (140) applies an RF field to an examination space (116) of a magnetic resonance (MR) imaging system (110). The RF antenna device (140) has a tubular body and is segmented in its longitudinal direction (154). Each segment (162, 164) has at least one activation port. The result is that each mode, corresponding to an activation port, may be controlled individually. Accordingly, the inhomogeneity of the subject of interest in the longitudinal direction of the RF antenna device can directly be addressed. There are different ways to build up a z-segmented RF antenna device.

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：US20240302464A1

公开(公告)日：2024-09-12

申请号：US18276306

申请日：2022-02-23

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Christoph Günther Leussler ,  Christian Findeklee

IPC: G01R33/36

CPC classification number: G01R33/3685

Abstract: According to the invention, a cable harness (7) for a magnetic resonance system is provided, wherein the cable harness (7) is adapted for being connected to a feeding point of a magnetic resonance radiofrequency coil device (1) on one end and for being connected to an input-output unit (6) for connecting the magnetic resonance radiofrequency coil device (1) with a control and analysis unit of the magnetic resonance system on the other end, wherein the cable harness (7) comprises at least one transmission line (8) for connecting the feeding point with the input-output unit (6) and multiple radiofrequency chokes (10) which are arranged within the cable harness (7). In this way, a bulky resonant RF traps can be avoided while still the B1-excitation field of the MR system can be compensated for and coupling to local nearby coils can be reduced.

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：US10788548B2

公开(公告)日：2020-09-29

申请号：US15518533

申请日：2015-10-02

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Christian Findeklee ,  Christoph Leussler ,  Peter Vernickel

IPC: G01R33/28 ,  G01R33/385 ,  G01R33/46 ,  G01V3/10 ,  G01N27/72

Abstract: The invention provides for a metal detector (100, 300) with at least a first coil (102) for generating a first magnetic field (108) along a first direction (119). The first coil is a split coil with a first (104) and a second (106) portion (104). A coil power supply (110) separately supplying time varying electrical power to the coil portions. At least one electrical sensor (116, 118) measures electrical data (136) descriptive of the electrical power supplied to at least the first coil portion and the second coil portion. The coils are controlled such as to move a field-free region in a predetermined pattern within a measurement zone. If metal is detected, the pattern is modified for refining localisation of the metallic object.

公开(公告)号：US10274555B2

公开(公告)日：2019-04-30

申请号：US15127859

申请日：2015-02-27

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Christian Findeklee ,  Christoph Leussler

IPC: G01R33/34 ,  G01R33/3415 ,  G01R33/36 ,  G01R33/422

Abstract: An RF antenna system (100, 1014, 1014′) transmits RF excitation signals into and/or receives MR signals from an MR imaging system's (1000, 1100, 1200) imaging volume (1015). The magnetic resonance imaging antenna includes a coil former (100, 1014, 1014′) adjacent to the imaging volume (1015); and a resonator (400, 500, 600) attached to the coil former and tuned to at least one resonant frequency formed from electrical connections (304), between multiple capacitors (302). The multiple capacitors are distributed in a periodic pattern (300, 700, 800, 900) about and along the coil former.

公开(公告)号：US20240402272A1

公开(公告)日：2024-12-05

申请号：US18694442

申请日：2022-08-29

Applicant: KONINKLIJKE PHILIPS N.V.

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

IPC: G01R33/3415 ,  G01R33/34 ,  G01R33/36

Abstract: A magnetic resonance (MR) coil construction system includes MR coil sheets (20) comprising electrically conductive MR coil elements or MR coil element portions (22) disposed in electrically insulating sheets (26). The MR coil sheets have edges with connecting mechanisms (34. 48) configured to connect the MR coil sheets to construct an MR coil array (44).