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公开(公告)号：US10330764B2
公开(公告)日：2019-06-25
申请号：US15287114
申请日：2016-10-06
申请人： HITACHI, LTD.
发明人： Yoshitaka Bito
IPC分类号： G01V3/00 , G01R33/565 , G01R33/46
摘要： Provided is a magnetic resonance measuring apparatus that records measurement data measured by MRS or the like and a periodic motion of the measurement object during the measurement of the measurement data in association with each other, and classifies spectra calculated from the measurement data in accordance with a time phase of the periodic motion. Created spectra are integrated for each classification to thereby create partially integrated spectra, correction based on a relationship between the periodic motion and a phase fluctuation or a frequency fluctuation is performed on the partially integrated spectra, and the corrected partially integrated spectra are synthesized.
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公开(公告)号：US10330759B2
公开(公告)日：2019-06-25
申请号：US15262233
申请日：2016-09-12
发明人： Flavio Carinci , Dominik Paul , Himanshu Bhat , Mario Zeller
IPC分类号： G01V3/00 , G01R33/483 , G01R33/561 , G01R33/385
摘要： In a method and apparatus for acquiring magnetic resonance (MR) data, an MR data acquisition scanner is operated, while a subject is situated therein to execute a simultaneous multislice (SMS) turbo spin echo (TSE) sequence by implementing a TSE-based reference scan to acquire reference data and an imaging scan, to acquire raw MR data from the subject. The reference data and the raw MR data are entered into a memory organized as k-space. A computer accesses the memory in order to make the k-space data, composed of said reference data and said image data, available in electronic form, as at least one data file.
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公开(公告)号：US10324156B2
公开(公告)日：2019-06-18
申请号：US15654328
申请日：2017-07-19
IPC分类号： G01V3/00 , G01R33/565 , G01R33/56 , G01R33/48
摘要： Some implementations provide a MRI system configured to: access data encoding an input gradient waveform that would otherwise be used on a gradient sub-system of the MRI system to generate a gradient that corresponds to perturbations to the substantially uniform magnetic field; access data encoding a forward impulse response function and an inverse impulse response function, both characterizing a gradient generated from a target impulse input; pre-emphasizing the input gradient waveform by using both the forward impulse response function and the reverse impulse response function; and drive the gradient sub-system using the pre-emphasized gradient waveform such that distortions to the gradient caused by eddy currents within the gradient sub-system are substantially removed while radio-frequency (RF) samples for reconstructing an MRI image are being acquired from a grid that is substantially identical to when gradient sub-system is driven using the input gradient waveform.
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94.发明授权公开(公告)号：US10310036B2
公开(公告)日：2019-06-04
申请号：US15408555
申请日：2017-01-18
发明人： Jin-sub Kim , Raghavendra Putti
摘要： A magnetic resonance imaging (MRI) apparatus and a method of detecting an error of the MRI apparatus are provided. The MRI apparatus includes a radio frequency (RF) coil configured to transmit and receive an RF signal, a bias circuit configured to tune and detune the RF coil, and a monitoring circuit configured to monitor a parameter among a bias voltage and a bias current of the bias circuit, based on a monitoring pattern. The MRI apparatus further includes a controller configured to determine whether the bias circuit is in an abnormal state, based on a determination criteria and the monitored parameter, and either one or both of the monitoring pattern and the determination criteria vary based on a status of the bias circuit.
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公开(公告)号：US10310035B2
公开(公告)日：2019-06-04
申请号：US15337045
申请日：2016-10-28
发明人： Wen Ming Li , Tong Tong , Markus Vester , JianMin Wang
摘要： A body coil for an MRI system has a conductor management and a tuning/detuning circuit. The tuning/detuning circuit is connected to the conductor management, and used to subject the conductor management to tuning/detuning control by a control signal. The tuning/detuning circuit has a control signal interface, a switch diode unit and an AC/DC conversion circuit. The control signal interface receives the control signal. There is at least one switch diode unit, respectively series-connected on at least one antenna rod and/or at least one end ring of the body coil conductor management. The AC/DC conversion circuit has a rectifying circuit, for converting the power of an input RF emission signal in the MRI system to a DC current, the DC current being used to provide a DC current for the switch diode unit to be turned on. The body coil reduces the cost of a DC power supply, and this reduces heat generated by the diodes.
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公开(公告)号：US10309914B2
公开(公告)日：2019-06-04
申请号：US15385332
申请日：2016-12-20
申请人： Robert Bosch GmbH
发明人： Andreas Graessl , Klaus Marx , Reiner Krapf , Ulli Hoffmann
摘要： A hand-held measuring appliance includes at least a nuclear magnetic resonance sensor, a control apparatus configured to control the measuring appliance, an evaluation apparatus configured to evaluate a measurement signal supplied by the nuclear magnetic resonance sensor, an output apparatus configured to output ascertained information, and an apparatus for energy supply. The measuring appliance is configured to examine at least one of fuel, oil, and hydraulic fluid.
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公开(公告)号：US10302728B2
公开(公告)日：2019-05-28
申请号：US15055834
申请日：2016-02-29
发明人： Jin-young Hwang , Joon-soo Kim
IPC分类号： G01V3/00 , G01R33/563 , G01R33/561 , G01R33/48
摘要： A magnetic resonance imaging apparatus includes a signal transceiver, and a sequence controller configured to control the signal transceiver to apply an RF pulse and a gradient magnetic field to a first portion of an object, wait for blood to flow from the first portion of the object to which the RF pulse and the gradient magnetic field are applied, to a second portion of the object, and apply the RF pulse and the gradient magnetic field to the second portion of the object to which the blood flows, using a 3D balanced steady-state free precession (bSSFP), and subsample first magnetic resonance data from the second portion of the object to which the RF pulse and the gradient magnetic field are applied. The apparatus further includes an image processor configured to generate label image data based on the first magnetic resonance data.
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公开(公告)号：US10302726B2
公开(公告)日：2019-05-28
申请号：US15322502
申请日：2015-07-01
发明人： Feng Huang , Hua Guo , Zhe Zhang , Bi Da Bd Zhang
IPC分类号： G01V3/00 , G01R33/561 , G01R33/563 , G01R33/565
摘要： This invention provides an image processing method and apparatus for reconstructing an image of a site of a subject. The image processing method comprises: generating a first estimated phase of each shot of multiple shots of the site by sensitivity encoding based on shot data of the corresponding shot obtained for the site; reconstructing a first multiplexed sensitivity encoded image based on the first estimated phase of each shot and shot data of each shot; generating a second estimated phase of each shot of the multiple shots by regularized sensitivity encoding using the first multiplexed sensitivity encoded image; and reconstructing a second multiplexed sensitivity encoded image based on the second estimated phase of each shot and shot data of each shot. In this way, the quality of the finally reconstructed image in magnetic resonance imaging is further improved.
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公开(公告)号：US10295624B2
公开(公告)日：2019-05-21
申请号：US13918461
申请日：2013-06-14
申请人： Elfar Adalsteinsson , Luca Daniel , Bastien Guerin , Zohaib Mahmood , Markus Vester , Lawrence Wald
发明人： Elfar Adalsteinsson , Luca Daniel , Bastien Guerin , Zohaib Mahmood , Markus Vester , Lawrence Wald
IPC分类号： G01V3/00 , G01R33/36 , G01R33/561
摘要： A method of determining a decoupling matrix of a decoupling system for an array of coils of a parallel transmission magnetic resonance imaging (MRI) system includes obtaining impedance matrix data for the array of coils without the decoupling system, determining, based on the impedance matrix data for the array of coils, an objective function representative of deviation from a decoupled operating condition for the array of coils in which the array of coils are decoupled via the decoupling system, and defining, with a processor, a decoupling matrix representative of a set of impedances of the decoupling system with an iterative procedure that optimizes elements of the decoupling matrix to minimize the objective function and reach the decoupled operating condition.
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100.发明授权公开(公告)号：US10288712B2
公开(公告)日：2019-05-14
申请号：US15252727
申请日：2016-08-31
发明人： Yongchuan Lai , Moran Wei , Xiaoxi Mao
IPC分类号： G01V3/00 , G01R33/563 , G01R33/385
摘要： The present invention provides an apparatus and method for controlling a pulse sequence of a magnetic resonance (MR) imaging system, the MR imaging system comprising a radio frequency magnetic field coil and a gradient magnetic field coil, the apparatus for controlling a pulse sequence of the MR imaging system comprising a radio frequency driving unit and a gradient driving unit. The gradient driving unit is used for applying a first motion probing gradient (MPG) pulse and a second MPG pulse to the gradient magnetic field coil successively. The radio frequency driving unit is used for applying a radio frequency excitation pulse to the radio frequency magnetic field coil before the first MPG pulse is applied, and for applying a first 90-degree radio frequency refocusing pulse, a 180-degree radio frequency refocusing pulse and a second 90-degree radio frequency refocusing pulse to the radio frequency magnetic field coil successively between a time when the first MPG pulse is applied and a time when the second MPG pulse is applied.
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