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公开(公告)号：US11624794B2
公开(公告)日：2023-04-11
申请号：US17445249
申请日：2021-08-17
发明人： Chad Tyler Harris , Jeff Alan Stainsby , Andrew Thomas Curtis , Philip J. Beatty , Curtis Nathan Wiens
摘要： An automatic protocolling system and methods involving a processor operable by way of a set of executable instructions storable in relation to a nontransient memory device, the set of executable instructions configuring the processor to: receive information relating to an initial protocol comprising an initial ordering of a plurality of sequences, the information comprising data relating to an interaction extent value of at least one of an imaging system and a patient as a function of time corresponding to each sequence in the plurality of sequences, the data relating to a time-integrated effect of each sequence in the plurality of sequences; and dynamically determine an alternative protocol comprising an alternative ordering of the plurality of sequences based on the time-integrated effect, whereby an alternative protocol is provided.
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公开(公告)号：US11266326B2
公开(公告)日：2022-03-08
申请号：US16133530
申请日：2018-09-17
摘要： Systems and methods for manufacturing and using magnetic resonance (“MR”) visible labels or markers to encode information unique to the subject or object being imaged by a magnetic resonance imaging (“MRI”) system are provided. The use of such MR-visible labels or markers enables unique information associated with the subject or object being imaged to be encoded into the images of the subject or object. This information can be used to anonymize protected health information (“PHI”); to provide detailed information about a surgical simulation device, quality assurance phantom, or the like; to provide spatial orientation and registration information; or so on.
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公开(公告)号：US20220349968A1
公开(公告)日：2022-11-03
申请号：US17810525
申请日：2022-07-01
IPC分类号： G01R33/3815 , G01R33/38 , H01F6/04
摘要： A magnetic resonance imaging (MRI) system includes a set of magnet coils for generating a magnetic field. The set of magnet coils are composed of a superconducting material. The system further includes a mechanical cryocooler in thermal contact with the set of magnet coils and operable to reduce and maintain a temperature of the set of magnet coils below a transition temperature of the superconducting material, and an energy storage device coupled to the set of magnet coils. The energy storage device may be capable of receiving and storing energy dissipated from the set of magnet coils during rapid shutdown of the set of magnet coils. The system may also include a controller coupled to the energy storage device. The controller may be programmed to recharge the set of magnet coils using the energy stored in the energy storage device during the rapid shutdown of the set of magnet coils.
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公开(公告)号：US11378639B2
公开(公告)日：2022-07-05
申请号：US16983745
申请日：2020-08-03
IPC分类号： G01R33/565 , G01R33/58
摘要： Some implementations provide a system that includes: a housing having a bore in which a subject to be image is placed; a main magnet configured to generate a volume of magnetic field within the bore, the volume of magnetic field having inhomogeneity below a defined threshold; one or more gradient coils configured to linearly vary the volume of magnetic field as a function of spatial location; one or more pulse generating coils configured to generate and apply radio frequency (RF) pulses to the volume of magnetic field in sequence to scan the portion of the subject; one or more shim gradient coils configured to perturb a spatial distribution of the linearly varying volume of magnetic field; and a control unit configured to operate the gradient coils, pulse generating coils, and shim gradient coils such that only the user-defined region within the volume of magnetic field is imaged.
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公开(公告)号：US11300643B2
公开(公告)日：2022-04-12
申请号：US16316707
申请日：2016-07-11
IPC分类号： G01R33/3875 , A61B5/055 , G01R33/38 , G01R33/381
摘要： Some implementations provide a system that includes: a housing having a bore in which a subject to be image is placed; a main magnet configured to generate a volume of magnetic field within the bore, the volume of magnetic field having inhomogeneity below a defined threshold; one or more gradient coils configured to linearly vary the volume of magnetic field as a function of spatial location; one or more pulse generating coils configured to generate and apply radio frequency (RF) pulses to the volume of magnetic field in sequence to scan the portion of the subject; one or more shim gradient coils configured to perturb a spatial distribution of the linearly varying volume of magnetic field; and a control unit configured to operate the gradient coils, pulse generating coils, and shim gradient coils such that only the user-defined region within the volume of magnetic field is imaged.
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公开(公告)号：US11243283B1
公开(公告)日：2022-02-08
申请号：US16942412
申请日：2020-07-29
发明人： Geron Andre Bindseil , Blaine Alexander Chronik , Ian Robert Oliphant Connell , Andrew Thomas Curtis , William Bradfield Handler , Chad Tyler Harris , Jeff Alan Stainsby , Philip J. Beatty
IPC分类号： G01R33/385 , G01R33/38
摘要： An asymmetric electromagnet system, method, and method of producing an asymmetric electromagnet system, wherein the asymmetric electromagnet system is for generating an imaging magnetic field in an imaging region with an imaging isocentre, the imaging region being asymmetrically positioned within a gradient coil bore inside a magnetic resonance imaging (MRI) system during imaging, the electromagnet assembly comprising: an asymmetric gradient coil configured to generate a gradient field in the asymmetrically positioned imaging region, at least one gradient axis having the gradient field with a constant offset component such that the position at which the gradient field passes through zero is offset with respect to the imaging isocentre of the asymmetrically positioned imaging region.
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公开(公告)号：US11237235B2
公开(公告)日：2022-02-01
申请号：US16773532
申请日：2020-01-27
发明人： Chad Tyler Harris , Philip J. Beatty , Alexander Gyles Panther , Jeff Alan Stainsby , David Mark Deschenes
IPC分类号： G01V3/00 , G01R33/3875 , G01R33/385 , G01R33/54
摘要： A method for operating a magnetic resonance imaging (MRI) system that includes: accessing data indicating a first region for imaging a portion of a subject, the portion being placed in a main magnet of the MRI system and the main magnet generating a magnetic field; selecting, from a group of available shimming coils, a first subset of shimming coils arranged and configured such that, when the shimming coils in the first subset are driven, a homogeneity of the magnetic field at the first region is increased; and driving the shimming coils in the selected first subset of shimming coils without driving other shimming coils in the group of available shimming coils such that the homogeneity of the magnetic field at the first region increases relative to the homogeneity of the magnetic field at the first region when the shimming coils of the selected first subset are not driven.
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8.发明申请公开(公告)号：US20210263121A1
公开(公告)日：2021-08-26
申请号：US17301312
申请日：2021-03-31
发明人： Chad Tyler Harris , David Mark Deschenes , Alexander Gyles Panther , Jeff Alan Stainsby , Philip J. Beatty
IPC分类号： G01R33/50 , G01R33/38 , G01R33/3815 , G01R33/44
摘要： Systems and methods for magnetic field-dependent relaxometry using magnetic resonance imaging (“MRI”) are provided. Relaxation parameters, including longitudinal relaxation time (“T1”) and transverse relaxation time (“T2”), are estimated from magnetic resonance signal data acquired at multiple different magnetic field strengths using the same MRI system. By measuring these relaxation parameters as a function of magnetic field strength, T1 dispersion data, T2 dispersion data, or both, are generated. Based on this dispersion data, quantitative physiological parameters can be estimated. As one example, iron content can be estimated from T2 dispersion data.
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公开(公告)号：US11506738B2
公开(公告)日：2022-11-22
申请号：US16164220
申请日：2018-10-18
IPC分类号： G01R33/44 , A61B5/05 , A61B5/00 , G01R33/56 , G01R33/28 , G01R33/20 , G01R33/54 , G01R33/565
摘要： A delta-relaxation magnetic resonance imaging (DREMR) system is provided. The system includes a main field magnet and field shifting coils. A main magnetic field with a strength B0 can be generated using the main filed magnet and the strength B0 of the main magnetic field can be varied through the use of the field-shifting coils. The DREMR system can be used to perform signal acquisition based on a pulse sequence for acquiring at least one of T2*-weighted signals imaging; MR spectroscopy signals; saturation imaging signals and MR signals for fingerprinting. The MR signal acquisition can be augmented by varying the strength B0 of the main magnetic field for at least a portion of the pulse sequence used to acquire the MR signal.
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10.发明申请公开(公告)号：US20220244331A1
公开(公告)日：2022-08-04
申请号：US17162051
申请日：2021-01-29
IPC分类号： G01R33/3815 , G01R33/38 , H01F6/04
摘要： A magnetic resonance imaging (MRI) system includes a set of magnet coils for generating a magnetic field. The set of magnet coils are composed of a superconducting material. The system further includes a mechanical cryocooler in thermal contact with the set of magnet coils and operable to reduce and maintain a temperature of the set of magnet coils below a transition temperature of the superconducting material, and an energy storage device coupled to the set of magnet coils. The energy storage device may be capable of receiving and storing energy dissipated from the set of magnet coils during rapid shutdown of the set of magnet coils. The system may also include a controller coupled to the energy storage device. The controller may be programmed to recharge the set of magnet coils using the energy stored in the energy storage device during the rapid shutdown of the set of magnet coils.
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