公开(公告)号：US11543482B2

公开(公告)日：2023-01-03

申请号：US17285115

申请日：2019-10-14

申请人： KONINKLIJKE PHILIPS N.V.

发明人： Tim Nielsen ,  Jan Hendrik Wuelbern

IPC分类号： G01V3/00 ,  G01R33/565 ,  G01R33/385 ,  G01R33/48 ,  G01R33/56 ,  G01R33/561 ,  G01R33/567

摘要： The invention relates to a method of MR imaging of an object (10). It is an object of the invention to enable MR imaging in the presence of motion of the imaged object, wherein full use is made of the acquired MR signal and a high-quality MR image essentially free from motion artefacts is obtained. The method of the invention comprises the steps of: generating MR signals by subjecting the object (10) to an imaging sequence comprising RF pulses and switched magnetic field gradients; acquiring the MR signals as signal data over a given period of time (T); subdividing the period of time into a number of successive time segments (SO, S1, S2, . . . Sn); deriving a geometric transformation (DVF1, DVF2, . . . DVFn) in image space for each pair of consecutive time segments (S0, S1, S2, . . . Sn), which geometric transformation (DVF1, DVF2, . . . DVFn) reflects motion occurring between the two time segments of the respective pair; and reconstructing an MR image from the signal data, wherein a motion compensation is applied according to the derived geometric transformations (DVF1, DVF2, . . . DVFn). Moreover, the invention relates to an MR device (1) and to a computer program for an MR device (1).

公开(公告)号：US11609294B2

公开(公告)日：2023-03-21

申请号：US16479802

申请日：2018-01-23

申请人： KONINKLIJKE PHILIPS N.V.

发明人： Falk Uhlemann ,  Tim Nielsen ,  Jan Hendrik Wuelbern

IPC分类号： G01R33/56 ,  G01R33/563 ,  G01R33/567 ,  A61B5/055 ,  A61B5/00

摘要： The invention provides for a magnetic resonance imaging system (100, 200) comprising a memory (148) for storing machine executable instructions (150) and pulse sequence commands (152). The pulse sequence commands are configured for acquiring a four dimensional magnetic resonance data set (162) from an imaging region of interest (109). The four dimensional magnetic resonance data set is at least divided into three dimensional data magnetic resonance data sets (400, 402, 404, 406, 408) indexed by a repetitive motion phase of the subject. The three dimensional data magnetic resonance data sets are further at least divided into and indexed by k-space portions (410, 412, 414, 416, 418, 420, 422, 424, 426, 428, 430, 432, 434, 436). The magnetic resonance imaging system further comprises a processor (144) for controlling the magnetic resonance imaging system. Execution of the machine executable instructions causes the processor during a first operational portion (310) to iteratively: receive (300) a motion signal (156) descriptive of the repetitive motion phase; acquire (302) an initial k-space portion using the pulse sequence commands, wherein the initial k-space portion is selected from the k-space portions; store (304) the motion signal and the initial k-space portion in a buffer (158) for each iteration of the first operational portion; at least partially construct (306) a motion phase mapping (160) between the motion signal and the repetitive motion phase; and continue (308) the first operational portion until the motion phase mapping is complete. Execution of the machine executable instructions causes the processor to assign (312) the initial k-space portion for each iteration of the first operational portion in the temporary buffer to the four dimensional magnetic resonance data set using the motion phase mapping. Execution of the machine executable instructions causes the processor during a second operational portion (332) to iteratively: receive (314) the motion signal; determine (316) a predicted next motion phase using the motion signal and the motion phase mapping; select (318) a subsequent k-space portion (154) from the k-space portions of the four dimensional magnetic resonance data set using the predicted next motion phase; acquire (320) the subsequent k-space portion using the pulse sequence commands; rereceive (322) the motion signal; determine (324) a current motion phase using the re-received motion signal and the motion phase mapping; assign (326) the subsequent k-space portion to the four dimensional magnetic resonance data set using the current motion phase; and repeat (328) the second operational portion until the k-space portions for each repetitive motion phase has been assigned.

公开(公告)号：US20220175486A1

公开(公告)日：2022-06-09

申请号：US17598544

申请日：2020-03-27

申请人： KONINKLIJKE PHILIPS N.V.

发明人： Peter Forthmann ,  Sascha Krueger ,  Jan Hendrik Wuelbern

IPC分类号： A61B90/00 ,  A61B5/055 ,  A61B5/11

摘要： Disclosed is a magnetic resonance imaging magnet assembly (102, 102′) configured for supporting a subject (118) within an imaging zone (108). The magnetic resonance imaging magnet assembly comprises a magnetic resonance imaging magnet (104), wherein the magnetic resonance imaging magnet is configured for generating a main magnetic field with the imaging zone. The magnetic resonance imaging magnet assembly further comprises an optical image generator (122) configured for generating a two-dimensional image. The magnetic resonance imaging magnet assembly further comprises an optical waveguide bundle (123) configured for coupling to the optical image generator. The magnetic resonance imaging magnet assembly further comprises a two-dimensional display (124) comprising pixels (600), wherein each of the pixels comprises a diffusor (602, 602′). Each of the pixels is optically coupled to at least one optical waveguide selected from the optical waveguide bundle, wherein the at least one optical waveguide of each of the pixels is configured for illuminating the diffusor. The optical waveguide bundle and the two-dimensional display are configured for displaying the two-dimensional image.

公开(公告)号：US09983279B2

公开(公告)日：2018-05-29

申请号：US14437137

申请日：2013-10-14

申请人： KONINKLIJKE PHILIPS N.V.

发明人： Christoph Leussler ,  Jan Hendrik Wuelbern

IPC分类号： G01R33/34 ,  G01R33/36 ,  H01Q7/00 ,  G01R33/565

CPC分类号： G01R33/34076 ,  G01R33/3614 ,  G01R33/3628 ,  G01R33/365 ,  G01R33/5659 ,  H01Q7/00

摘要： A radio frequency (RF) antenna device (40) applies an RF field to an examination space (16) of a magnetic resonance (MR) imaging system (10). The RF antenna device (40) includes a plurality of rungs (42, 44) arranged substantially parallel and in an azimuthally substantially equally spaced relationship along an outside of a virtual cylinder (50) with a cylinder axis (52) running parallel to main directions of extension (48). At least one transversal antenna member (54) electromagnetically is coupled to at least one rung (42, 44) of the plurality of rungs (42, 44). The at least one transversal antenna member (54) is arranged within a plane substantially perpendicular to the main directions of extension (48) of the plurality of rungs (42, 44). At least one RF circuit (62, 64, 66) is provided for each rung (42, 44) of the plurality of rungs (42, 44) for mutual decoupling and for individually feeding RF power into the at least one transversal antenna member (54).

公开(公告)号：US20220413074A1

公开(公告)日：2022-12-29

申请号：US17781135

申请日：2020-12-15

申请人： KONINKLIJKE PHILIPS N.V.

发明人： Kay NEHRKE ,  Peter Boernert ,  Jan Hendrik Wuelbern

IPC分类号： G01R33/483 ,  G01R33/56

摘要： Disclosed herein is a method of training a neural network (214) to perform a SENSE magnetic resonance imaging reconstruction. The method comprises receiving (100) initial training data, wherein the initial training data comprises sets of initial training complex channel images each paired with a predetermined number of initial ground truth images. The method further comprises generating (102) additional training data by performing data augmentation on the initial training data such that the data augmentation comprises adding a distinct phase offset to each of the set of initial training complex channel images during generation of the sets of additional training complex channel images. The method further comprises inputting (104) the sets of additional training complex channel images into the neural network and receiving in response a predetermined number of output training images and performing deep learning using the output training images.

公开(公告)号：US20150276897A1

公开(公告)日：2015-10-01

申请号：US14437137

申请日：2013-10-14

申请人： KONINKLIJKE PHILIPS N.V.

发明人： Christoph Leussler ,  Jan Hendrik Wuelbern

IPC分类号： G01R33/34 ,  G01R33/36 ,  H01Q7/00

CPC分类号： G01R33/34076 ,  G01R33/3614 ,  G01R33/3628 ,  G01R33/365 ,  G01R33/5659 ,  H01Q7/00

摘要： A radio frequency (RF) antenna device (40) for applying an RF field to an examination space (16) of a magnetic resonance (MR) imaging system (10), the RF antenna device (40) comprising a plurality of rungs (42, 44) arranged substantially parallel and in an azimuthally substantially equally spaced relationship along an outside of a virtual cylinder (50) with a cylinder axis (52) running parallel to main directions of extension (48); at least one transversal antenna member (54) electromagnetically coupled to at least one rung (42, 44) of the plurality of rungs (42, 44), wherein the at least one transversal antenna member (54) is arranged within a plane substantially perpendicular to the main directions of extension (48) of the plurality of rungs (42, 44); and a plurality of RF circuitries (62, 64, 66), wherein at least one RF circuitry (62, 64, 66) is provided for each rung (42, 44) of the plurality of rungs (42, 44) for mutual decoupling and for individually feeding RF power into and for the at least one transversal antenna member (54) for individually feeding RF power into.

摘要翻译： 一种用于将RF场施加到磁共振（MR）成像系统（10）的检查空间（16）的射频（RF）天线装置（40），所述RF天线装置（40）包括多个梯级 ，44）基本上平行并且沿着具有平行于延伸部（48）的主方向延伸的气缸轴线（52））的虚拟气缸（50）的外侧以方位角基本上等间隔的关系布置; 至少一个横向天线构件（54），其电磁耦合到所述多个梯级（42,44）中的至少一个梯级（42,44），其中所述至少一个横向天线构件（54）布置在基本垂直的平面 到所述多个梯级（42,44）的延伸部（48）的主要方向上。 以及多个RF电路（62,64,66），其中为所述多个梯级（42,44）中的每个梯级（42,44）提供至少一个RF电路（62,64,66），用于相互解耦 并且用于将射频功率单独馈送到所述至少一个横向天线构件（54）中以用于单独地馈送RF功率。