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公开(公告)号：US20180003789A1
公开(公告)日：2018-01-04
申请号：US15599776
申请日：2017-05-19
IPC分类号： G01R33/56 , G01R33/48 , A61N5/10 , G01R33/3873 , G01R33/3875
CPC分类号： G01R33/56 , A61N5/1049 , A61N2005/1055 , G01R33/3873 , G01R33/3875 , G01R33/4808
摘要： A method of correcting a magnetic field of a medical apparatus (300) comprising a magnetic resonance imaging system (302). The MRI system includes a magnet (306) for generating the magnetic field within an imaging zone 318. The magnet generates a magnetic field with a zero crossing (346, 404) outside of the imaging zone. The medical apparatus further comprises a gantry (332) configured for rotating a ferromagnetic component (336, 510) about a rotational axis (333). The method comprises the step of installing (100, 200) a magnetic correcting element (348, 900, 1000) located on a radial path (344, 504) perpendicular to the rotational axis. The magnetic correcting element is positioned on the radial path such that change in the magnetic field within the imaging zone due to the ferromagnetic component is reduced. The method further comprises repeatedly: measuring (102, 202, 1204) the magnetic field within the imaging zone; determining (104, 204, 1206) the change in the magnetic field in the imaging zone; and adjusting (106, 206, 1208) the position of the magnetic correcting element along the radial path if the change in the magnetic field is above a predetermined threshold.
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公开(公告)号：US20170356970A1
公开(公告)日：2017-12-14
申请号：US15688047
申请日：2017-08-28
CPC分类号： G01R33/3642 , G01R33/34 , G01R33/3815 , H01F6/008 , H01F6/06 , H01F6/065 , H01H36/008
摘要： The invention provides for magnetic resonance imaging system (600) comprising a superconducting magnet (100) with a first current lead (108) and a second current lead (110) for connecting to a current ramping system (624). The magnet further comprises a vacuum vessel (104) penetrated by the first current lead and the second current lead. The magnet further comprises a magnet circuit (106) within the vacuum vessel. The magnet circuit has a first magnet circuit connection (132) and a second magnet circuit connection (134). The magnet further comprises a first switch (120) between the first magnet connection and the first current lead and a second switch (122) between the second magnet connection and the second current lead. The magnet further comprises a first current shunt (128) connected across the first switch and a second current shunt (130) connected across the second switch. The magnet further comprises a first rigid coil loop (124) operable to actuate the first switch. The first rigid coil loop forms a portion of the first electrical connection. The magnet further comprises a second rigid coil loop (126) operable to actuate the second switch. The second rigid coil loop forms a portion of the second electrical connection.
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33.发明授权公开(公告)号：US11536787B2
公开(公告)日：2022-12-27
申请号：US16063305
申请日：2016-12-21
IPC分类号： G01R33/385 , H01F41/071
摘要： A magnetic field z-gradient coil is manufactured by inserting elements (38) into openings (36) on an outside of an insulating carrier (32), wrapping an electrical conductor turn (34) around the outside of the insulating carrier with one side of the wrapped electrical conductor alongside elements inserted into openings on the outside of the insulating carrier, removing the elements alongside the one side of the wrapped electrical conductor from the openings, and repeating to wrap conductor turns of a z-gradient coil (20) around the electrically insulating carrier. A transverse magnetic field gradient coil is manufactured by laying electrical conductor (44) onto a mold (50) with a keying feature (46, 46a) extending along the conductor engaging a mating keying feature (52, 52a) of the mold that defines a winding pattern (56), attaching an insulating back plate (58) to the resulting coil section opposite from the mold, and removing the mold.
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公开(公告)号：US20210271777A1
公开(公告)日：2021-09-02
申请号：US17260587
申请日：2019-10-22
摘要： Some embodiments are directed to a container builder (110) for building a container image for providing an individualized network service based on sensitive data (122) in a database (121). The container builder (110) retrieves the sensitive data (122) from the database (121), builds the container image (140), and provides it for deployment to a cloud service provider (111). The container image (140) comprises the sensitive data (122) and instructions that, when deployed as a container, cause the container to provide the individualized network service based on the sensitive data (122) comprised in the container image (140).
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35.发明授权公开(公告)号：US11041925B2
公开(公告)日：2021-06-22
申请号：US16339405
申请日：2017-09-22
摘要： A processor controls an MRI system with pulse sequence commands to acquire magnetic resonance data according to a magnetic resonance fingerprinting protocol during multiple pulse repetitions. The pulse sequence commands control the magnetic resonance imaging system to cause gradient induced spin rephasing at least twice during each of the multiple pulse repetitions, and to acquire at least two magnetic resonance signals during each of the multiple pulse repetitions. Each of the at least two magnetic resonance signals is measured during a separate one of the gradient induced spin rephasing. The magnetic resonance data includes the at least two magnetic resonance signals acquired during each of the multiple pulse repetitions. The processor further at least partially calculates a B0-off-resonance map using the magnetic resonance data, and generates at least one magnetic resonance parametric map by comparing the magnetic resonance data with a magnetic resonance fingerprinting dictionary.
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公开(公告)号：US20210050092A1
公开(公告)日：2021-02-18
申请号：US16980386
申请日：2019-03-14
摘要： Various embodiments of the inventions of the present disclosure a systematic framework of matrices constructed as a basis for a centralized control of assigning imaging operators to operate imaging systems (11) in accordance with a plurality of scheduled imaging examinations. An operator preference matrix (70) including an array of operator preference entries arranged by the imaging operators and the scheduled imaging examinations and an operator availability matrix (80) including an array of operator availability entries arranged by the imaging operators and the scheduled imaging examinations are constructed to provide for a construction of an operator capability matrix (60) including an array of operator capability entries arranged by the imaging operators and the scheduled imaging examinations, which the operator capability matrix (60) serving as a basis for generating an operator assignment schedule (50) for the imaging operators to operate the imaging systems (11) in accordance with the scheduled imaging examinations.
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公开(公告)号：US10816625B2
公开(公告)日：2020-10-27
申请号：US16095954
申请日：2017-04-26
发明人： Peter Bornert , Kay Nehrke , Mariya Ivanova Doneva , Thomas Erik Amthor , Peter Koken , George Randall Duensing
IPC分类号： G01R33/50 , G01R33/48 , G01R33/56 , G01R33/561 , G01R33/563 , G01R33/485
摘要： The invention provides for a magnetic resonance imaging system (100) for acquiring magnetic resonance data (142) from a subject (118) within an imaging zone (108). The magnetic resonance imaging system comprises a memory (134, 136) for storing machine executable instructions (160), and pulse sequence commands (140, 400, 502, 600, 700), wherein the pulse sequence commands are configured to cause the magnetic imaging resonance system to acquire the magnetic resonance data according to a magnetic resonance fingerprinting technique. The pulse sequence commands are further configured to control the magnetic resonance imaging system to perform spatial encoding using a zero echo time magnetic resonance imaging protocol. Execution of the machine executable instructions causes the processor controlling the MRI system to: acquire (200) the magnetic resonance data by controlling the magnetic resonance imaging system with the pulse sequence commands; and calculate (202) a spatial distribution (146) of each of a set of predetermined substances by comparing the magnetic resonance data with a magnetic resonance fingerprinting dictionary (144).
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公开(公告)号：US10794976B2
公开(公告)日：2020-10-06
申请号：US15527028
申请日：2015-11-16
发明人： Thomas Erik Amthor , Sascha Krueger , Mariya Ivanova Donevea , Peter Koken , Julien Senegas , Jochen Keupp , Peter Boernert
IPC分类号： A61B5/00 , A61B5/055 , G01R33/56 , G16H50/70 , G16H50/20 , G01R33/48 , G06F21/32 , G01R33/50 , G06K9/62
摘要： A method of employing a central computer database (18) for supporting a characterization of tissue by magnetic resonance fingerprinting measurements, includes: exciting nuclei of a subject of interest by applying (50) a radio frequency excitation field B1 generated according to a magnetic resonance fingerprinting sequence (38), acquiring (52) magnetic resonance imaging signal data from radiation emitted by excited nuclei of the subject of interest, transferring (54) a magnetic resonance fingerprinting data set (42) to the central computer database (18), retrieving (56) a predefined dictionary from the central computer database (18), matching (60) the acquired magnetic resonance imaging signal data to the retrieved dictionary by applying a pattern recognition algorithm to determine a value (40) or a set of values (40) for at least one physical quantity (T1, T2), adding (62) at least the determined value (40) or the determined set of values (40) as a new entry of an associated medical data set (36) to the central computer database (18), and making (64) the new entry of an associated medical data set (36) accessible to users of the central computer database (18). A magnetic resonance fingerprinting data collection and analysis system (10) includes a central computer database, a data receiving unit (20), a data output unit (22) and a data analysis device (26) configured to carry out the method.
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公开(公告)号：US20200166596A1
公开(公告)日：2020-05-28
申请号：US16627827
申请日：2018-07-03
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.
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公开(公告)号：US10537748B2
公开(公告)日：2020-01-21
申请号：US14416451
申请日：2013-07-23
IPC分类号： A61N5/10 , A61B18/14 , A61N1/05 , A61N1/20 , A61N1/32 , A61M39/22 , A61B34/00 , A61B34/10 , A61B90/00 , A61B18/00
摘要： A medical device for multiple treatment therapies includes a hollow tube (102) having a first end portion with an electrode (104) disposed at the first end portion and an insulator (108) configured over a length of the tube such that conductive materials of the tube, except for the electrode, are electrically isolated from an exterior surface the tube. A conductive connection (127) is configured to electrically couple to the electrode to provide a voltage thereto. A selectively closeable valve (106) is configured to dispense a medical fluid from the tube.
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