公开(公告)号：US20210278490A1

公开(公告)日：2021-09-09

申请号：US17273741

申请日：2019-09-03

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： CHRISTOPH LEUSSLER ,  MICHAEL GUNTER HELLE ,  DANIEL WIRTZ ,  GEREON VOGTMEIER ,  STEFFEN WEISS

IPC: G01R33/34 ,  G01R33/3415 ,  G01R33/565

Abstract: The invention may improve image quality of magnetic resonance imaging (MRI). The invention is directed to a coil arrangement (200) for magnetic resonance imaging. It comprises a base structure having a variable shape, an RF coil arranged on or in the base structure, an actuator means at least partially extending along the base structure such that the base structure is deformable along and/or about at least one axis, a position detecting means adapted to detect a current position of at least a portion of the subject to be examined relative to the RF coil, and control means coupled to the position detecting means and the actuator means, wherein the control means is adapted to adjust the shape of the base structure to maintain a contact of an outer surface of the base structure (210) and/or the RF coil (220) with the at least portion of the subject by driving the actuator means in response to a detected change of the current position relative to a previous position. The invention is further directed to a (MRI) system, a method for positioning an RF coil for a magnetic resonance imaging system relative to a subject to be examined, and a non-transitory computer-readable medium.

公开(公告)号：US20210059556A1

公开(公告)日：2021-03-04

申请号：US16962244

申请日：2019-01-15

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： CHRISTOPH LEUSSLER ,  INGO SCHMALE

IPC: A61B5/055 ,  G01R33/36 ,  G01R33/34 ,  G01R33/565

Abstract: The present disclosure relates to a multi-channel magnetic resonance imaging RF coil (114) with at least four channels and comprising a coil element for each of the channels, the RF coil (114) further comprising for each coil element a socket (300-306) that is electrically coupled to said coil element via a respective first transmission line (209), each socket (300-306) being adapted for receiving a plug for providing an RF signal via the respective first transmission line (209) to the respective coil element, wherein with respect to a predefined RF signal the differences in electrical length between any of the transmission lines is kλ/4 where k is an integer and λ is the wavelength of the RF signal.

公开(公告)号：US20190317164A1

公开(公告)日：2019-10-17

申请号：US16468759

申请日：2017-12-21

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： CHRISTOPH LEUSSLER ,  CHRISTIAN FINDEKLEE ,  OLIVER LIPS

IPC: G01R33/422 ,  G01R33/34 ,  G01R33/345 ,  H01F5/00

Abstract: The present invention provides a radio frequency (RF) shield device (124) for a magnetic resonance (MR) examination system (110), whereby the RF shield device (124) comprises a first shield (250) and a second shield (252), the first shield (250) and the second shield (252) are arranged with a common center axis (118), the first shield (250) has a shield structure (254) different from a shield structure (254) of the second shield (252), and the first shield (250) and the second shield (252) are designed in accordance with different modes of operation of a RF coil device (140). The present invention also provides a radio frequency (RF) coil device (140) for a magnetic resonance (MR) examination system (110), whereby the RF coil device (140) comprises a first coil (200) and in a second coil (202), the first coil (200) and the second coil (202) are provided as birdcage coils, the first coil (200) and the second coil (202) are arranged with a common center axis (118), the first coil (200) and the second coil (202) have rungs (204), which are arranged non-parallel to the center axis (118) of the RF coil device (140), the first coil (200) has a coil structure (210) different from a coil structure (210) of the second coil (202), and the first coil (200) and the second coil (202) are switchable to be active for different modes of operation. The present invention further provides a magnetic resonance (MR) imaging system (110), comprising such a RF coil device (140) and/or such a RF shield device (124).

公开(公告)号：US20180172785A1

公开(公告)日：2018-06-21

申请号：US15737350

申请日：2016-06-08

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： CHRISTOPH LEUSSLER ,  CHRISTIAN FINDEKLEE ,  PETER VERNICKEL

IPC: G01R33/28 ,  G01R33/3415 ,  G01R33/36 ,  G01R33/54

CPC classification number: G01R33/288 ,  G01R33/341 ,  G01R33/3415 ,  G01R33/36 ,  G01R33/3607 ,  G01R33/543 ,  G01R33/546

Abstract: A magnetic resonance imaging system (10) comprising at least one magnetic resonance radio frequency antenna device (30) and at least one metal detector unit (38) for detecting metal within the subject of interest (20) including at least one metal detector coil (40), wherein the at least one magnetic resonance radio frequency antenna device (30) and the at least one metal detector coil (40) mechanically or electrically or spatially form an integral unit (34); and a method of operating, with regard to detecting metal-comprising implants (36) and selecting magnetic resonance pulse sequences, such magnetic resonance imaging system (10).

公开(公告)号：US20160139218A1

公开(公告)日：2016-05-19

申请号：US14898292

申请日：2014-06-17

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： CECILIA POSSANZINI ,  CHRISTOPH LEUSSLER

IPC: G01R33/30 ,  G01R33/34 ,  G01R33/28 ,  G01R33/36

CPC classification number: G01R33/30 ,  A61B5/0555 ,  G01R33/288 ,  G01R33/3403 ,  G01R33/34046 ,  G01R33/3614 ,  G01R33/3621

Abstract: The invention provides for a subject support assembly (125) for a magnetic resonance imaging system (100, 200, 300, 400, 500). The subject support is operable for supporting a subject (118) within an imaging zone (108) of a magnet (104) of the magnetic resonance imaging system. The subject support is operable for supporting at least one radio frequency amplifier (124, 124′, 124″) outside of the imaging zone. The subject support is operable for supplying DC electrical power to the at least one radio frequency amplifier.

Abstract translation: 本发明提供一种用于磁共振成像系统（100,200,300,400,500）的对象支持组件（125）。 受试者支撑件可操作用于支撑磁共振成像系统的磁体（104）的成像区域（108）内的对象（118）。 受试者支持可操作用于在成像区域外部支持至少一个射频放大器（124,124'，124“）。 主体支持可操作用于向至少一个射频放大器提供DC电力。

公开(公告)号：US20210146158A1

公开(公告)日：2021-05-20

申请号：US17045163

申请日：2019-03-29

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： DANIEL WIRTZ ,  TIM NIELSEN ,  CHRISTOPH LEUSSLER

IPC: A61N5/10 ,  G01R33/567 ,  G01S13/88 ,  G01R33/28 ,  G01R33/48

Abstract: The invention provides for a medical instrument (100, 300, 400, 500) comprising a magnetic resonance imaging system (102). The medical instrument further comprises a subject support (120) with a support surface (121) configured for supporting at least a portion of the subject within an imaging zone (108). The subject support comprises a radar array (125) embedded below the support surface. The medical instrument further comprises a radar system (124) for acquiring a radar signal (144) from the subject. The medical instrument further comprises a motion detection system (122) configured for acquiring a movement signal (146). Execution of machine executable instructions (140) causes a processor (130) to: continuously (200) receive the radar signal; continuously (202) receive the movement signal; continuously (204) calculate a combined motion signal (148) from the radar system and the movement signal; and control (206) the magnetic resonance imaging system with the pulse sequence commands to acquire the magnetic resonance imaging data, wherein the acquisition of the magnetic resonance imaging data is controlled using the combined motion signal.

公开(公告)号：US20210141039A1

公开(公告)日：2021-05-13

申请号：US16629587

申请日：2018-07-12

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： CHRISTIAN FINDEKLEE ,  CHRISTOPH LEUSSLER

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

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：US20210003646A1

公开(公告)日：2021-01-07

申请号：US16969256

申请日：2019-02-12

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： PETER VERNICKEL ,  CHRISTOPH LEUSSLER

IPC: G01R33/36 ,  G01R33/54 ,  H03F3/21 ,  H03F1/02

Abstract: A multi-channel RF transmit system (1) especially for use in a magnetic resonance examination system comprising, a plurality of RF channels (18, 19) wherein each of the RF channels (18, 19) has an RF amplifier. The multi-channel RF transmit system (1) further comprises a power supply device (2) configured to supply power to the amplifiers (4, 5), a first capacitor bank (6), wherein the first capacitor bank (6) is connected to the power supply device (2) and connected to a first RF amplifier (4), a second capacitor bank (7), wherein the second capacitor bank (7) is connected to the power supply device (2) and connected to a second RF amplifier (5) and a third capacitor bank (8) also connected to the power supply device (2). The third capacitor bank (8) is connected to a DC switch (9), wherein the DC switch (9) is configured to switch the power supplied by the third capacitor bank (8) to the first amplifier (4) or the second amplifier (5). Therefore, a multi-channel RF transmit system (1) is disclosed where parts of the total available capabilities of discrete stored energy can be directed to one or the other RF amplifier channel (18, 19) leading to a more effective and cost saving design of the DC power supply chain.

公开(公告)号：US20190079151A1

公开(公告)日：2019-03-14

申请号：US15743101

申请日：2016-07-12

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： CHRISTOPH LEUSSLER ,  PETER VERNICKEL

IPC: G01R33/3415 ,  G01R33/36

Abstract: An radio frequency (RF) transmit module for a magnetic resonance examination system is disclosed. The local field monitoring unit measures the field emitted by an RF transmission element and generates a puc-signal. The puc-signal is amplified and frequency-down-converted by mixing with an oscillator signal. The frequency-down-converted puc-signal and the RF drive signal for the RF transmission element as transferred over the common signal lead. The oscillator signal may also be transferred over the common signal lead.

公开(公告)号：US20180364319A1

公开(公告)日：2018-12-20

申请号：US16060039

申请日：2016-12-08

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： PETER VERNICKEL ,  CHRISTIAN FINDELKEE ,  CHRISTOPH LEUSSLER

IPC: G01R33/36 ,  G01R33/3415

Abstract: A radio frequency (RF) coil array with multiple RF coil elements for a magnetic resonance examination system is disclosed. The decoupling of RF coil elements involves sets (pairs) of transformers and may also include geometrical overlap of adjacent coils. The mutual coupling between the transformers is adjustable. This provides additional degrees of freedom to fully decouple the RF coil elements from each other.