专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

WO2020048935A1 COIL ARRANGEMENT FOR MAGNETIC RESONANCE IMAGING SYSTEM 审中-公开
公开(公告)号：WO2020048935A1
公开(公告)日：2020-03-12
申请号：PCT/EP2019/073377
申请日：2019-09-03
申请人： KONINKLIJKE PHILIPS N.V.
发明人： LEUSSLER, Christoph , HELLE, Michael, Günter , WIRTZ, Daniel , VOGTMEIER, Gereon , WEISS, Steffen
IPC分类号： G01R33/34 , G01R33/3415 , G01R33/565
摘要： 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 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.

2. 发明申请

WO2019091883A1 CALIBRATION OF IMAGE-REGISTRATION BASED TRACKING PROCEDURES 审中-公开
公开(公告)号：WO2019091883A1
公开(公告)日：2019-05-16
申请号：PCT/EP2018/080082
申请日：2018-11-05
申请人： KONINKLIJKE PHILIPS N.V.
发明人： KUSTRA, Jacek, Lukasz , ALLAIRE, Stéphane
IPC分类号： G06T7/246
CPC分类号： G06T7/246 , G06T2207/10072 , G06T2207/10132 , G06T2207/30004 , G06T2207/30204
摘要： The invention relates to a system and method for tracking at least one anatomic structure by means of an image-registration based tracking procedure using at least one parameter, where the anatomic structure includes a plurality of implanted markers. A parameter setting (6, 7) unit is configured to determine measured positions of the implanted markers in each image of a series of images acquired using an imaging unit (1), and to perform an optimization procedure to determine an optimized value of the at least one parameter on the basis of deviations between the measured and calculated positions. Then, the position of the anatomic structure is tracked in further images by means of the tracking procedure using the optimized value of the at least one parameter.

3. 发明申请

WO2019038192A1 DIXON-TYPE WATER/FAT SEPARATION MR IMAGING 审中-公开
公开(公告)号：WO2019038192A1
公开(公告)日：2019-02-28
申请号：PCT/EP2018/072295
申请日：2018-08-17
申请人： KONINKLIJKE PHILIPS N.V.
发明人： EGGERS, Holger
IPC分类号： G01R33/48 , G01R33/561 , G01R33/56 , G01R33/565
摘要： The invention relates to a method of Dixon-type MR imaging. It is an object of the invention to provide a method that enables efficient and reliable water/fat separation. The method of the invention comprises the following steps: subjecting an object (10) to an imaging sequence, which comprises at least one excitation RF pulse and switched magnetic field gradients, wherein two echo signals, a first echo signal and a second echo signal, are generated at different echo times (TE1, TE2), acquiring the echo signals from the object (10), reconstructing a water image and/or a fat image from the echo signals, wherein contributions from water and fat to the echo signals are separated using a two-point Dixon technique in a first region of k-space and a single-point Dixon technique in a second region of k-space, wherein the first region is different from the second region. In other words, the invention proposes an adaptive switching between a two-point Dixon technique for water/separation, applied to both the first and second echo signals, and a single-point Dixon technique applied to one of the two echo signals, i.e. the first echo signal data or the second echo signal data, depending on the position in k-space. Moreover, the invention relates to a MR device (1) and to a computer program to be run on a MR device (1).

4. 发明申请

WO2019016245A1 PARALLEL MULTI-SLICE MR IMAGING USING SIGNAL AVERAGING 审中-公开
公开(公告)号：WO2019016245A1
公开(公告)日：2019-01-24
申请号：PCT/EP2018/069452
申请日：2018-07-18
申请人： KONINKLIJKE PHILIPS N.V.
发明人： NISTI GRIGOLETTO BORGONOVI, Arthur, Filipe , JURRISSEN, Michel, Paul, Jurriaan , ROZIJN, Thomas, Hendrik
IPC分类号： G01R33/483 , G01R33/56 , G01R33/561 , G01R33/565 , G01R33/563
CPC分类号： G01R33/5611 , G01R33/4835 , G01R33/56 , G01R33/5608 , G01R33/56341 , G01R33/565
摘要： The invention relates to a method of MR imaging of an object (10) placed in an examination volume of a MR device (1). The method comprises the steps of: subjecting the object (10) to an imaging sequence comprising multi-slice RF pulses for simultaneously generating phase-encoded MR signals in two or more spatially separate image slices, wherein the imaging sequence imparts a slice-specific phase modulation to the magnetic resonance signals, acquiring the MR signals, wherein the MR signals are received in parallel via a set of at least two RF coils (11, 12, 13) having different spatial sensitivity profiles within the examination volume, and reconstructing a MR image for each image slice from the acquired MR signals, wherein MR signal contributions from the different image slices are separated on the basis of the spatial sensitivity profiles of the at least two RF coils (11, 12, 13) and on the basis of the phase modulation of the MR signals, wherein MR signal averaging is applied to increase the signal-to-noise ratio of the MR image, with the slice-specific phase modulation being varied from averaging step to averaging step. Moreover, the invention relates to a MR device (1) for carrying out this method as well as to a computer program to be run on a MR device.

5. 发明申请

WO2019007993A1 MAGNETIC RESONANCE FINGERPRINTING IN FOURIER SPACE 审中-公开
公开(公告)号：WO2019007993A1
公开(公告)日：2019-01-10
申请号：PCT/EP2018/068006
申请日：2018-07-03
申请人： KONINKLIJKE PHILIPS N.V.
发明人： SOMMER, Karsten , AMTHOR, Thomas, Erik , MEINEKE, Jan, Jakob , KOKEN, Peter , DONEVA, Mariya, Ivanova
IPC分类号： G01R33/50 , G01R33/56 , G01R33/561 , A61B5/00 , A61B5/055 , G01R33/565
摘要： The invention relates to a magnetic resonance imaging system (100, 400) comprising a memory (134) for storing machine executable instructions (140) and MRF pulse sequence commands (142). The MRF pulse sequence commands are configured for controlling the magnetic resonance imaging system to acquire MRF magnetic resonance data (144) according to a magnetic resonance fingerprinting protocol. The memory further contains a Fourier transformed magnetic resonance finger printing dictionary (150). The Fourier transformed magnetic resonance finger printing dictionary comprises entries for at least one intrinsic property (152). The magnetic resonance imaging system further comprises a processor (130) for controlling the magnetic resonance imaging system. Execution of the machine executable instructions causes the processor to: acquire (200) MRF magnetic resonance data (144) descriptive of a region of interest (109) by controlling the magnetic resonance imaging system with the MRF pulse sequence commands, wherein the region of interest is divided into voxels; construct (202) an MRF signal (146) for each of the voxels using the MRF magnetic resonance data; construct (204) a Fourier transformed MRF signal (148) by Fourier transforming the MRF signal for each of the voxels; and determine (206) the least one intrinsic property for each of the voxels using the Fourier transformed MRF signal and the Fourier transformed magnetic resonance finger printing dictionary. The Fourier transformed MRF signal is truncated to a predetermined number of terms before determining the at least one intrinsic property.

6. 发明申请

WO2019002034A1 METHOD AND DEVICE FOR DETERMINING A MOTION FIELD FROM K-SPACE DATA 审中-公开
公开(公告)号：WO2019002034A1
公开(公告)日：2019-01-03
申请号：PCT/EP2018/066342
申请日：2018-06-20
申请人： KONINKLIJKE PHILIPS N.V.
发明人： SBRIZZI, Allessandro , VAN DEN BERG, Cornelis, Antonius, Theodorus
IPC分类号： G01R33/563 , G01R33/48 , G06T7/20
摘要： The invention relates to a motion determination device for determining the motion of an object. The motion determination device comprises a magnetic resonance (MR) information providing unit (2, 5) for providing an MR image of the object (6) and for providing non-image MR data of the object which have been acquired at different acquisition times, and a motion determination unit (9) for determining a motion field, which describes the motion of the object (6), depending on the provided non-image MR data acquired at the different acquisition times and the provided MR image. Since the non-image MR data, which are preferentially k-space data, are directly used for determining the motion field, i.e. without an intermediate reconstruction of MR images based on the non-image MR data, the motion field can be determined with a very high temporal resolution.

7. 发明申请

WO2018206570A1 MAGNETIC RESONANCE IMAGING SYSTEM WITH EMERGENCY QUENCH 审中-公开
公开(公告)号：WO2018206570A1
公开(公告)日：2018-11-15
申请号：PCT/EP2018/061857
申请日：2018-05-08
申请人： KONINKLIJKE PHILIPS N.V.
发明人： HARVEY, Paul, Royston , JEAN, Eric , JENNESKENS, Theo
IPC分类号： G01R33/3815 , H01F6/02
摘要： The invention relates to a magnetic resonance imaging (MRI) system with emergency quench. According to the invention, a magnetic resonance imaging system (1) comprising a superconductive magnet (2) with windings (3) for generating a magnetic field, an emergency button (4) and a ciruitry logic (5) for controlling the magnet (2) coupled to the magnet (2) and to the emergency button (4), wherein the magnet (2) is operable in a superconducting state and in a normal conductivity state, respectively, and the emergency button (4) and the circuitry logic (5) are configured in such a way that, when the magnet (2) is operated in the superconducting state, actuating the emergency button (4) by a user in a predefined first way initiates ramping down the magnetic field while dissipating energy stored in the windings (3) of the magnet (2) to an external dissipation device (6), and actuating the emergency button (4) by a user in a predefined second way which is different from the first way initiates quenching the magnetic field by heating up at least part of the windings (3) of the magnet (2) leading to a dissipation of energy stored in the windings (3) of the magnet (2) as additional heat to the magnet (2). In this way, an easy and reliable way to control a superconductive magnet (2) of an MRI system (1) is provided in an event in which the magnetic field has to be removed.

8. 发明申请

WO2018206370A1 COOLING A GRADIENT COIL OF A MAGNETIC RESONANCE IMAGING SYSTEM 审中-公开
公开(公告)号：WO2018206370A1
公开(公告)日：2018-11-15
申请号：PCT/EP2018/061250
申请日：2018-05-03
申请人： KONINKLIJKE PHILIPS N.V.
发明人： MULDER, Gerardus, Bernardus, Jozef , TERMEER, Martijn, Krelis , JENNESKENS, Theo , KONIJN, Jan , VAN HEST, Guus
IPC分类号： G01R33/385
摘要： The present invention is related to cooling a gradient coil (2) of a magnetic resonance imaging system (1). According to the invention, a gradient coil assembly for a magnetic resonance imaging system (1) is provided, the gradient coil assembly comprising at least one gradient coil (2) and a cooling arangement for cooling the gradient coil (2), wherein the gradient coil (2) is comprised of a solid electrical conductor material forming one conductor line (21) or more conductor lines (21, 31, 41) which are in direct contact with each other, the cooling arangement comprises a cooling channel (22, 32, 42) for guiding a cooling fluid (10), and the cooling channel (22, 32, 42) is arranged outside along the one or more conductor lines (21, 31, 41) in such a way that in a cross-sectional view one single continuous interface line between the cooling channel (22, 32, 42) and the one or more conductor (21, 31, 41) lines is formed. In this way efficient cooling of the gradient coil (2) may be achieved.

9. 发明申请

WO2018141703A1 INDUCTIVELY FEEDING AN RF COIL FOR MAGNETIC RESONANCE IMAGING 审中-公开
公开(公告)号：WO2018141703A1
公开(公告)日：2018-08-09
申请号：PCT/EP2018/052192
申请日：2018-01-30
申请人： KONINKLIJKE PHILIPS N.V.
发明人： LEUSSLER, Christoph , LIPS, Oliver
IPC分类号： G01R33/36 , G01R33/34
摘要： 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.

10. 发明申请

WO2018091360A1 INTENSITY CORRECTED MAGNETIC RESONANCE IMAGES 审中-公开
公开(公告)号：WO2018091360A1
公开(公告)日：2018-05-24
申请号：PCT/EP2017/078833
申请日：2017-11-10
申请人： KONINKLIJKE PHILIPS N.V.
发明人： WENZEL, Fabian , BERGTHOLDT, Martin , THIELE, Frank, Olaf
IPC分类号： G01R33/56 , G01R33/565
摘要： The invention provides for a medical instrument (100) comprising a processor (134) and a memory (138) containing machine executable instructions (140). Execution of the machine executable instructions causes the processor to: receive (200) a first magnetic resonance image data set (146) descriptive of a first region of interest (122) of a subject (118) and receive (202) at least one second magnetic resonance image data set (152, 152') descriptive of a second region of interest (124) of the subject. The first region of interest at least partially comprises the second region of interest. Execution of the machine executable instructions further cause the processor to receive (204) an analysis region (126) within both the first region of interest and within the second region of interest. Execution of the machine executable instructions further cause the processor to construct (206) a cost function comprising an intra-scan homogeneity measure separately for the first magnetic resonance image data set and separately for each of the at least one second magnetic resonance image data set. The cost function further comprises an inter-scan similarity measure calculated using both the first magnetic resonance image data set and each of the at least one second magnetic resonance image data set. Execution of the machine executable instructions further cause the processor to by performing an optimization (208) of the cost function by calculating a first intensity correction map (154) for the first magnetic resonance image data set using an intensity correction algorithm within the analysis region and at least one second intensity correction map (156) for each of the at least one second magnetic resonance image data set within the analysis region. Execution of the machine executable instructions further cause the processor to calculate (210) a first corrected magnetic resonance image (158) descriptive of the analysis region using the first magnetic resonance image data set and the first intensity correction map. Execution of the machine executable instructions further cause the processor to calculate (212) at least one second corrected magnetic resonance image (160) descriptive of the analysis region using the at least at least one second magnetic resonance image data set and the at least one second intensity correction map.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式