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公开(公告)号：US20230128603A1
公开(公告)日：2023-04-27
申请号：US17913455
申请日：2021-03-24
发明人： Peter Vernickel , Christian Findeklee , Christoph Günther Leussler , Oliver Lips , Ingo Schmale , Peter Caesar Mazurkewitz
摘要： 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.
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2.发明申请RF-SAFE INTERVENTIONAL OR NON-INTERVENTIONAL INSTRUMENT FOR USE IN AN MRI APPARATUS 有权RF安全性传统或非传统仪器用于MRI设备公开(公告)号：US20140303485A1
公开(公告)日：2014-10-09
申请号：US14359151
申请日：2012-11-22
发明人： Steffen Weiss , Oliver Lips , Bernd David
IPC分类号： G01R33/28
CPC分类号： G01R33/288
摘要： An RF-safe interventional or a non-interventional instrument is disclosed for use during an MR imaging or MR examination of an examination object (A), which instrument is made of or comprises at least one longitudinal or elongated electrically conductive element (1, 3), especially 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 nevertheless electrically conductive, wherein 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 means of an MR imaging apparatus. The instrument is made RF-safe by increasing the energy A loss of an oscillator which is represented by the conductor (1, 3) by means of 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).
摘要翻译： 公开了用于在检查对象（A）的MR成像或MR检查期间使用的RF安全介入或非介入性仪器，该仪器由或包括至少一个纵向或细长的导电元件（1,3） ），特别是用于馈送电信号的导线或线或线的形式，或以仪器本身或其部件或部分的形式，其不被提供用于馈送电信号但仍然导电，其中所有这些 当仪器或元件暴露于通过MR成像设备的MR成像或MR检查期间产生的RF / MR激励场时，元件受到在元件中感应的RF共模电流。 通过增加由导体（1,3）表示的振荡器的能量A的损失，通过阻尼元件（4; 6）来增加仪器的RF安全性，以便防止或限制检查对象的RF加热 （A）在导体（1,3）处或周围。
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公开(公告)号：US11454684B2
公开(公告)日：2022-09-27
申请号：US16490996
申请日：2018-03-05
发明人： Falk Uhlemann , Graham Michael Place , Ingmar Graesslin , Christian Findeklee , Oliver Lips , Cornelis Jacobus Hendrikus Blom
摘要： 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).
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公开(公告)号：US11372064B2
公开(公告)日：2022-06-28
申请号：US16564011
申请日：2019-09-09
发明人： Christian Findeklee , Oliver Lips
摘要： 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.
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公开(公告)号：US11243279B2
公开(公告)日：2022-02-08
申请号：US17042276
申请日：2019-03-26
IPC分类号： G01R33/36
摘要： 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.
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公开(公告)号：US11099249B2
公开(公告)日：2021-08-24
申请号：US16754789
申请日：2018-09-26
摘要： 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.
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公开(公告)号：US10788559B2
公开(公告)日：2020-09-29
申请号：US15574264
申请日：2016-05-18
发明人： Oliver Lips
IPC分类号： G01R33/56 , G01R33/565
摘要： 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.
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8.发明授权公开(公告)号：US10705167B2
公开(公告)日：2020-07-07
申请号：US16090282
申请日：2017-04-04
发明人： Oliver Lips , Peter Vernickel
IPC分类号： G01R33/36 , G01R33/34 , G01R33/345
摘要： 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).
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公开(公告)号：US09835697B2
公开(公告)日：2017-12-05
申请号：US14359151
申请日：2012-11-22
发明人： Steffen Weiss , Oliver Lips , Bernd David
IPC分类号： G01R33/28
CPC分类号： G01R33/288
摘要： 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).
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公开(公告)号：US11269033B2
公开(公告)日：2022-03-08
申请号：US17046785
申请日：2019-04-02
发明人： Peter Vernickel , Ingo Schmale , Oliver Lips
IPC分类号： G01R33/3873 , G01R33/38
摘要： 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.
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