公开(公告)号：US11454684B2

公开(公告)日：2022-09-27

申请号：US16490996

申请日：2018-03-05

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Falk Uhlemann ,  Graham Michael Place ,  Ingmar Graesslin ,  Christian Findeklee ,  Oliver Lips ,  Cornelis Jacobus Hendrikus Blom

IPC: G06F11/07 ,  G01R33/36 ,  G01R33/54

Abstract: When predicting required component service in an imaging device such as a magnetic resonance (MR) imaging device (12), component parameters such as coil voltage, phase lock lost (PLL) events, etc. are sampled to monitor system components. Voltage samples are filtered according to their temporal proximity to coil plug-in and unplug events to generate a filtered data set that is analyzed by a processor (46) to determine whether to transmit a fault report. A service recommendation is received based on the transmitted report and includes a root cause diagnosis and service recommendation that is output to a user interface (50).

公开(公告)号：US11372064B2

公开(公告)日：2022-06-28

申请号：US16564011

申请日：2019-09-09

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Christian Findeklee ,  Oliver Lips

IPC: G01R33/36 ,  H02J50/12 ,  H02J7/02

Abstract: The invention relates to a magnetic resonance receive coil including a resonator for use in a magnetic resonance imaging system. The radio frequency receive coil according to the invention comprises a first conducting element of the resonator having a conductive loop wherein the received signal is induced in that loop, configured to form a primary resonant circuit tunable to at least one first resonance frequency and a second conducting element of the resonator configured to form an electric circuit electrically insulated from and reactively coupled to the primary resonant circuit, the electric circuit being adapted to detune the primary resonant circuit to at least one second resonance frequency. The second conducting element of the resonator has a conductive loop with a pair of ends connected to a preamplifier. The radio frequency receive coil further comprises an energy harvesting circuit electrically coupled in parallel over the pair of ends of the second conducting element, wherein the energy harvesting circuit is adapted for being connected to the second conducting element during transmission by a switch. A rechargeable power source is coupled to the energy harvesting circuit, wherein the rechargeable power source is adapted for being charged by the energy harvesting circuit. A switching component is circuited in parallel to the energy harvesting circuit, wherein is adapted to redirect a current as soon as the rechargeable power source is charged to a sufficient voltage. In this way, a magnetic resonance receive coil with a detune circuit and an energy harvesting circuit for energy harvesting is provided without a significant loss of detuning performance.

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：US10895613B2

公开(公告)日：2021-01-19

申请号：US16324594

申请日：2017-08-16

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Christian Findeklee ,  Christoph Leussler

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

Abstract: The invention concerns to a radio frequency (RF) body coil (2), for use in a Magnetic Resonance Imaging (MRI) system, comprising: an RF shield (6), an RF coil element (8), distantly arranged from the RF shield (6), and at least one distance setting element (10), arranged and designed in such a way that the relative distance (12) between the RF shield (6) and the RF coil element (8) is adjustable via the distance setting element (10) which may lead to locally deforming the RF coil element (8) and/or the RF shield (6). Thus, a radio frequency coil for use in an Magnetic Resonance Imaging system is provided that can be tuned to desired resonances in a comfortable and economic way.

公开(公告)号：US10534049B2

公开(公告)日：2020-01-14

申请号：US15569412

申请日：2016-04-26

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Christoph Leussler ,  Christian Findeklee

IPC: G01R33/34 ,  G01R33/422 ,  G01R33/48 ,  A61B5/055

Abstract: A radio frequency volume coil (136; 236) for use in a magnetic resonance examination system (10) includes a radio frequency shield (148; 248), and a pair of radio frequency conductive loop members (138; 238) spaced along a common longitudinal axis (140; 240), a plurality of axially arranged radio frequency conductive members electrically connected to at least one of the radio frequency conductive loop members (138; 238). At least two axially arranged loop coil interconnecting radio frequency conductive members (114; 244) electrically interconnect the radio frequency conductive loop members (138; 238). At least two of the axially arranged shield connecting radio frequency conductive members are axially arranged in an aligned manner at an azimuthal position within a range between azimuthal positions of the at least two loop coil interconnecting members (144; 244), and electrically serve and connect one of the two radio frequency conductive loop members (138; 238) to the radio frequency shield (148; 248). At least one installation space (152; 252) within an inner volume of the radio frequency volume coil (136; 236) is accessible from outside the radio frequency volume coil (136; 236) at least in a radial direction (56) within the range between the azimuthal positions of the two loop coil interconnecting members (144; 244) and within a range of axial directions between axial positions of ends of the shield-connecting members (146; 246) that are distal to the radio frequency conductive loop member (138; 238).

公开(公告)号：US20150276898A1

公开(公告)日：2015-10-01

申请号：US14439137

申请日：2013-10-23

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Christian Findeklee ,  Christoph Leussler

IPC: G01R33/34 ,  G01R33/561 ,  G01R33/565 ,  G01R33/345

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

Abstract: The present invention provides a radio frequency (RF) antenna device (140) for applying an RF field to an examination space (116) of a magnetic resonance (MR) imaging system (110), whereby the RF antenna device (140) is provided having a tubular body, the RF antenna device (140) is segmented in its longitudinal direction (154), and each segment (162, 164) is provided with 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 this direction, i.e. 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.

Abstract translation: 本发明提供一种用于将RF场施加到磁共振（MR）成像系统（110）的检查空间（116）的射频（RF）天线装置（140），由此提供RF天线装置（140） 具有管状体，所述RF天线装置（140）沿其纵向方向（154）分段，并且每个段（162,164）设置有至少一个激活端口。 结果是可以单独控制对应于激活端口的每个模式。 因此，可以直接解决在该方向上，即在RF天线装置的纵向方向上的感兴趣对象的不均匀性。 建立z分段RF天线设备有不同的方法。