公开(公告)号：EP3313273A1

公开(公告)日：2018-05-02

申请号：EP16815201.5

申请日：2016-06-22

申请人： The Medical College of Wisconsin, Inc.

发明人： KOCH, Kevin ,  ANDERSON, Casey

IPC分类号： A61B5/00 ,  A61B5/055 ,  A61B6/00 ,  G01J5/02 ,  G01N23/00 ,  G01R33/16 ,  G01R33/24

CPC分类号： G01R33/243 ,  A61B5/0042 ,  A61B5/0402 ,  A61B5/055 ,  A61B5/0816 ,  A61B5/4082 ,  A61B5/4088 ,  A61B5/7257 ,  A61B5/7285 ,  A61B2576/026 ,  G01R33/16 ,  G01R33/24 ,  G01R33/443 ,  G01R33/5602 ,  G01R33/5616 ,  G01R33/56536 ,  G06T11/008

摘要： Systems and methods for quantitative susceptibility mapping (“QSM”) using magnetic resonance imaging (“MRf”) and a localized processing technique are described. A field-shift map is processed based on localized regions of local field perturbations. These localized field-shift regions are processed using established QSM algorithms, or using direct dipole inversion techniques, to compute regional susceptibility distributions from the localized field shift information. When the localized regions correspond to subvolumnes of the field-shift map, local susceptibility maps can be generated and combined to form a composite quantitative susceptibility map. By computing regional susceptibility distributions based on localized field-shift information, residual streaking artifacts in the susceptibility map are constrained to the individual volumes from which they originate, thereby eliminating their propagation through the image.

公开(公告)号：EP3308185A1

公开(公告)日：2018-04-18

申请号：EP16727205.3

申请日：2016-06-07

申请人： Koninklijke Philips N.V.

发明人： BOERNERT, Peter ,  NEHRKE, Kay ,  EGGERS, Holger

IPC分类号： G01R33/44 ,  G01R33/48 ,  G01R33/56 ,  G01R33/565 ,  A61B5/055

CPC分类号： G01R33/4816 ,  A61B5/055 ,  A61N5/1039 ,  A61N5/1049 ,  A61N2005/1055 ,  G01R33/443 ,  G01R33/481 ,  G01R33/4812 ,  G01R33/4828 ,  G01R33/56 ,  G01R33/56536 ,  G01R33/56563

摘要： The invention provides for a medical instrument (100, 500) comprising a magnetic resonance imaging system (102) for acquiring magnetic resonance data (142) from a subject (118) within an imaging zone (108). The magnetic resonance imaging system comprises: a main magnet (104) for generating a B0 magnetic field within the imaging zone; a memory (134, 136) containing machine executable instructions (160, 162, 164, 166) and pulse sequence commands (140); a processor (130) for controlling the medical instrument. Execution of the machine executable instructions causes the processor to: acquire (200) the magnetic resonance data by controlling the magnetic resonance imaging system with the pulse sequence commands; receive (202) a subject magnetic susceptibility map (144) of the subject; calculate (204) a B0 inhomogeneity map (146) from the magnetic resonance data; calculate (206) a subject B0 magnetic field perturbation (148) from the subject magnetic susceptibility map; calculate (208) a residual B0 magnetic field perturbation (150) by subtracting the subject B0 magnetic field perturbation from the B0 inhomogeneity map; and calculate (210) a bone map (152) from the residual B0 magnetic field perturbation.

公开(公告)号：EP2869776A4

公开(公告)日：2017-10-11

申请号：EP14814725

申请日：2014-08-04

申请人： PROFOUND MEDICAL INC

发明人： KURTZ RON ,  TANG KEE ,  BURTNYK MATHIEU

IPC分类号： A61B18/04 ,  A61B5/01 ,  A61B5/055

CPC分类号： G01R33/4804 ,  A61B5/015 ,  A61B5/055 ,  A61B5/4381 ,  A61B2018/00547 ,  A61B2018/00636 ,  A61B2018/00702 ,  A61B2018/00791 ,  A61B2090/374 ,  A61B2090/3784 ,  A61N7/02 ,  A61N7/022 ,  A61N2007/0004 ,  A61N2007/0052 ,  A61N2007/0078 ,  G01R33/285 ,  G01R33/443 ,  G01R33/4814 ,  G01R33/5608 ,  G06F3/0484

摘要： Systems and methods are provided for an interactive overlay system. A player component is configured to display video content on a display screen of a display device. An overlay component is configured to display an interactive overlay sequence on the display screen simultaneously with and independent of the video content. An input device is configured to provide an input from a user. A status of the interactive overlay sequence is responsive to the input from the user such that a presentation of the interactive overlay is changed in response to the input from the user.

公开(公告)号：EP1207402A2

公开(公告)日：2002-05-22

申请号：EP01309547.6

申请日：2001-11-13

申请人： GE Medical Systems Global Technology Company LLC

发明人： Goto, Takao

IPC分类号： G01R33/565

CPC分类号： G01R33/56563 ,  G01R33/443

摘要： For the purpose of compensating for a variation in the static magnetic field of an MRI apparatus, RF probes 1P1 and 1P2 are placed and a reference static magnetic field is measured as a reference frequency in the beginning; the static magnetic field is measured at an appropriate time as a frequency to determine the amount of static magnetic field variation from their difference; and the transmission frequency of an RF pulse and the receiving detection frequency of an NMR signal are corrected or the gradient current for a gradient coil is corrected so as to compensate for the amount of the magnetic field variation.

摘要翻译： 用于补偿的MRI装置的静磁场，RF探针1P1和1P2的变化的目的被放置和参考静磁场被测量为在开始时的基准频率; 静磁场在以适当的时间测量作为频率确定性矿静磁场的变化从它们的差的量; 和RF脉冲的发送频率和一个NMR信号的检测接收频率被校正或用于梯度线圈的梯度电流被校正以补偿磁场的变化量。

公开(公告)号：EP3410141A2

公开(公告)日：2018-12-05

申请号：EP18175145.4

申请日：2018-05-30

申请人： Jeol Ltd.

发明人： NISHIHAGI, Naoki

IPC分类号： G01R33/24 ,  G01R33/56 ,  G01R33/3875

CPC分类号： G01R33/3875 ,  G01R33/0017 ,  G01R33/243 ,  G01R33/443 ,  G01R33/4625 ,  G01R33/5608 ,  G01R33/5615

摘要： An offset map is determined in advance by a preliminary measurement process. A phase map is generated by execution of a long τ pulse sequence. A magnetic field map is calculated based on a phase map and a phase offset map. A shim adjustment is performed based on the magnetic field map. The offset map is calculated based on a first phase map acquired by execution of a first pulse sequence, a second phase map acquired by execution of a second pulse sequence, and a ratio α related to phase evolution periods.

公开(公告)号：EP3402399A1

公开(公告)日：2018-11-21

申请号：EP16890770.7

申请日：2016-12-19

申请人： Samsung Electronics Co., Ltd.

发明人： ZHO, Sang-young ,  LEE, Dae-ho

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

CPC分类号： G01R33/56545 ,  G01R33/443 ,  G01R33/4818 ,  G01R33/482 ,  G01R33/5611 ,  G01R33/5615 ,  G01R33/5616 ,  G01R33/56554 ,  G01R33/56563

摘要： A magnetic resonance imaging (MRI) apparatus for obtaining a magnetic resonance (MR) image, based on a multi-echo sequence, and a method of the MRI apparatus are provided. The MRI apparatus includes a data obtainer configured to obtain first echo data, based on an echo that is generated at a first echo time, and obtain second echo data, based on an echo that is generated at a second echo time later than the first echo time, the first echo data including a part overlapping a part included in the second echo data in a k-space. The MRI apparatus further includes an image processor configured to reconstruct the MR image, based on the first echo data and the second echo data.

公开(公告)号：EP3385743A1

公开(公告)日：2018-10-10

申请号：EP18166020.0

申请日：2018-04-06

申请人： Case Western Reserve University

发明人： Griswold, Mark A. ,  Mehta, Bhairav Bipin ,  Coppo, Simone

IPC分类号： G01R33/54 ,  G01R33/56 ,  G01R33/561 ,  G01R33/24 ,  G01R33/44 ,  G01R33/50

CPC分类号： G01R33/561 ,  A61B5/055 ,  G01R33/243 ,  G01R33/34092 ,  G01R33/3808 ,  G01R33/443 ,  G01R33/50 ,  G01R33/543 ,  G01R33/56 ,  G01R33/5608 ,  G01R33/5614

摘要： A system and method is provided for performing a magnetic resonance fingerprinting (MRF) study in the face of inhomogeneous magnetic fields. The process includes performing a balanced steady-state free precession (bSSFP) pulse sequence multiple times to acquire a multiple MRF datasets from at region of interest (ROI) in a subject, wherein performing the multiple bSSFP pulse sequences includes cycling through multiple phase patterns that differ across the multiple times. The process also includes comparing the multiple MRF datasets with a MRF dictionary to determine at least one tissue property indicated by each of the multiple MRF datasets, producing an aggregated indication of the at least one tissue property, and producing at least one map of the at least one tissue property using the aggregated indication of the at least one tissue property.

公开(公告)号：EP2636366A4

公开(公告)日：2015-04-22

申请号：EP11837843

申请日：2011-10-13

申请人： HITACHI MEDICAL CORP

发明人： ITO KOSUKE ,  TAKIZAWA MASAHIRO ,  KUROKAWA SHINJI

IPC分类号： A61B5/055 ,  G01R33/24 ,  G01R33/44 ,  G01R33/56 ,  G01R33/565

CPC分类号： G01R33/56 ,  A61B5/055 ,  G01R33/246 ,  G01R33/443 ,  G01R33/5659

公开(公告)号：EP2743715A1

公开(公告)日：2014-06-18

申请号：EP13194793.9

申请日：2013-11-28

申请人： Northrop Grumman Guidance and Electronics Company, Inc.

发明人： Larsen, Michael S. ,  Griffith, Robert C. ,  Bulatowicz, Michael D. ,  Clark, Philip R.

IPC分类号： G01R33/26

CPC分类号： G01R33/26 ,  G01R33/032 ,  G01R33/24 ,  G01R33/443 ,  G01R33/60

摘要： One embodiment of the invention includes a magnetometer system. The system includes a sensor cell comprising alkali metal particles and a probe laser configured to provide a probe beam through the sensor cell. The system also includes a detection system configured to implement nuclear magnetic resonance (NMR) detection of a vector magnitude of an external magnetic field in a first of three orthogonal axes based on characteristics of the probe beam passing through the sensor cell and to implement electron paramagnetic resonance (EPR) detection of a vector magnitude of the external magnetic field in a second and a third of the three orthogonal axes based on the characteristics of the probe beam passing through the sensor cell. The system further includes a controller configured to calculate a scalar magnitude of the external magnetic field based on the magnitude of the external magnetic field in each of the three orthogonal axes.

摘要翻译： 本发明的一个实施例包括磁力计系统。 该系统包括包含碱金属颗粒的传感器单元和配置成提供通过传感器单元的探针束的探针激光器。 该系统还包括检测系统，其被配置为基于通过传感器单元的探测光束的特性来实现三个正交轴中的第一个中的外部磁场的矢量幅值的核磁共振（NMR）检测，并实现电子顺磁性 基于通过传感器单元的探测光束的特性，在三个正交轴的第二和第三个中的外部磁场的矢量幅度的共振（EPR）检测。 该系统还包括控制器，其被配置为基于三个正交轴中的每一个中的外部磁场的大小来计算外部磁场的标量值。

公开(公告)号：EP2676150A1

公开(公告)日：2013-12-25

申请号：EP12710788.6

申请日：2012-02-10

申请人： Koninklijke Philips N.V.

发明人： YANG, Baolian

IPC分类号： G01R33/46 ,  G01R33/483 ,  G01R33/485 ,  G01R33/565 ,  G01R33/56

CPC分类号： G01R33/443 ,  G01R33/4625 ,  G01R33/4838 ,  G01R33/485 ,  G01R33/5607 ,  G01R33/56563

摘要： A magnetic resonance (MR) sequence (14) is performed, including: applying a preparatory MR sub-sequence (S prep) providing water signal suppression; performing a magnetic resonance spectroscopy (MRS) sub-sequence (S MRS) after applying the preparatory MR sub-sequence to acquire H MRS data with water signal suppression; and performing an MR reference sub-sequence (S Ref) to acquire MR reference data. The MR reference sub-sequence is performed after the MRS sub-sequence. Phase and B0 correction of the H MRS data with water signal suppression are performed using the MR reference data to generate corrected MRS data. The excitation pulse (g) of the MR reference sub-sequence has a flip angle of less than or equal to o, and more preferably has a flip angle of less than or equal to 3 o. In some embodiments the MR sequence has a total repetition time (TR) of 2000 msec or less.