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公开(公告)号：US20240310467A1
公开(公告)日：2024-09-19
申请号：US17673522
申请日：2022-02-16
申请人： Fahad Alraddadi , William Monski , Tobias Sun
发明人： Fahad Alraddadi , William Monski , Tobias Sun
CPC分类号： G01R33/583 , A61B5/055
摘要： A device for remotely diagnosing an MRI coil comprises: a Diagnostic Interface Device (or DID); means for plugging the MRI coil into the DID when the MRI coil is not in use, said device adapted for: (a) measuring the status of certain key electrical conditions for the coil; (b) receiving a response back from the signals initially aimed at the coil in question; (c) processing those responses received; and (d) transferring the measured electronic status (using a specific code number for the coil) to a remote storage area on the internet. A method of use is also disclosed.
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公开(公告)号：US20240272259A1
公开(公告)日：2024-08-15
申请号：US18434786
申请日：2024-02-06
发明人： Xiangbin FANG , Can LIAO , Tuota XING , Feichao FU
IPC分类号： G01R33/58 , A61B5/055 , G01R33/565
CPC分类号： G01R33/583 , A61B5/055 , G01R33/56518 , A61B2560/0223
摘要： A method for calibrating a medical device is provided. The medical device may include a magnetic resonance (MR) device. The method may include switching a gradient field in at least one gradient direction of the MR device; obtaining a magnetic flux variation in the at least one gradient direction in at least one portion of a spatial region within a gradient field domain of the MR device using a magnetic flux measurement component; determining a center of the gradient field domain of the MR device based on the magnetic flux variation; and performing a mechanical adjustment on the MR device to locate the center of the gradient field domain at a target position based on the center of the gradient field domain, or adjusting an image reconstruction process to correct or eliminate an impact of inaccuracy of the center of the gradient field domain on a reconstructed image.
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公开(公告)号：US20190242962A1
公开(公告)日：2019-08-08
申请号：US16270654
申请日：2019-02-08
发明人： Dominik Paul , Flavio Carinci , Mario Zeller
IPC分类号： G01R33/48 , G01R33/483 , G01R33/561 , G01R33/58
CPC分类号： G01R33/482 , G01R33/4818 , G01R33/4835 , G01R33/5608 , G01R33/5611 , G01R33/583
摘要： A magnetic resonance apparatus and method acquire magnetic resonance data with a recording technique in which the Cartesian scanning of k-space is carried out differently, by a rotation of gradient directions around the center of k-space, for different recording sections of a respective part of the magnetic resonance data, and this recording technique is combined with an accelerating imaging technique for which reference data completely describing a reference range around the center of k-space are used for each individual slice to be scanned. At the beginning of the recording, a calibration area of k-space, which includes all the reference ranges required in the course of recording, is determined and a calibration data set of k-space is recorded in a calibration measurement with complete, Cartesian scanning of the calibration area. Reference data for each recording section are determined from this calibration data set.
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公开(公告)号：US20190154784A1
公开(公告)日：2019-05-23
申请号：US15820681
申请日：2017-11-22
发明人： Daniel Polak , Yen Mei Lisa Chuah , Esther Raithel
IPC分类号： G01R33/561 , G01R33/48 , G01R33/56 , G01R33/58 , G01R33/565
CPC分类号： G01R33/5617 , G01R33/4818 , G01R33/4822 , G01R33/5608 , G01R33/5611 , G01R33/56509 , G01R33/56545 , G01R33/583
摘要： Magnetic resonance (MR) data are acquired by applying magnetic fields to an examination region concurrent with stimulated echo signals, such that trajectories, which are not straight lines, are generated in k-space. For this purpose, sequence of RF pulses is applied to generate the stimulated echo signals in the examination object, undersampled MR measurement data are detected during reception of the stimulated echo signals in the at least two receiving coils, along the curved k-space trajectories, and fully sampled MR measurement are generated from the undersampled MR measurement data using sensitivity information of the at least two receiving coils. Alternatively, the MR measurement data are fully sampled in a central region of k-space, and a region outside the central region is not fully sampled, and a phase correction with a Partial Fourier technique is executed on the MR measurement data using fully sampled MR measurement data from the central region of k-space.
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公开(公告)号：US20190094321A1
公开(公告)日：2019-03-28
申请号：US16140898
申请日：2018-09-25
发明人： Flavio Carinci , Mario Zeller
IPC分类号： G01R33/483 , G01R33/58 , G01R33/48 , G01R33/561
CPC分类号： G01R33/4835 , G01R33/4822 , G01R33/5611 , G01R33/56341 , G01R33/56509 , G01R33/583
摘要： In a magnetic resonance slice multiplexing method and apparatus, measurements are repeated with additional phase amounts being applied, wherein in each repetition, the additionally applied phase amounts are changed such that at least a central k-space region is fully sampled in the course of the repeated acquisitions. A calibration dataset, which is used in reconstructing image data for the simultaneously excited slices from the acquired measurement data, is determined from the measurement data that have been fully acquired in the central k-space region. The calibration dataset is updated in further measurements.
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公开(公告)号：US20180321169A1
公开(公告)日：2018-11-08
申请号：US15768419
申请日：2016-10-18
发明人： Chang S. Shin , Mark Cheiron Butler
CPC分类号： G01N24/081 , E21B47/12 , E21B47/122 , E21B49/08 , G01R33/448 , G01R33/583 , G01V3/32
摘要： Various embodiments include a method for configuring and generating a non-adiabatic saturation pulse for use in nuclear magnetic resonance (NMR) logging. One such method configures the pulse by adjusting one or more of pulse amplitude modulation or phase cycling. The modified pulse is transmitted into a fluid such that a substantially uniform nuclear spin saturation or nuclear spin inversion echo response is received from the fluid. A wait time between the pulse transmission and the echo response that indicates that spin equilibrium has been achieved is substantially equal to a T1 time. The wait time is an indication of the characteristics of the fluid.
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公开(公告)号：US10073159B2
公开(公告)日：2018-09-11
申请号：US14116421
申请日：2012-05-23
申请人： Shinji Kurokawa
发明人： Shinji Kurokawa
IPC分类号： G01V3/00 , G01R33/56 , G01R33/561 , G01R33/58 , G01R33/54
CPC分类号： G01R33/56 , G01R33/543 , G01R33/5617 , G01R33/583
摘要： In order to maximize the SNR of an image in consideration of signal correction in a multi-echo sequence, flip angles of a plurality of refocus high frequency magnetic field pulses are determined in a multi-echo imaging sequence. Using an index that reflects the SNR of an image after signal correction of a plurality of acquired echo signals, a flip angle at which the SNR of the image becomes a maximum is determined by repeatedly calculating the index by changing information specifying the flip angle of each refocus RF pulse according to an optimization method set in advance.
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8.发明申请公开(公告)号：US20180196115A1
公开(公告)日：2018-07-12
申请号：US15401749
申请日：2017-01-09
IPC分类号： G01R33/58 , G01R33/48 , G01R33/483
CPC分类号： G01R33/583 , G01R33/4816 , G01R33/4833 , G01R33/56572 , G01R33/5659
摘要： Described herein is an apparatus and method for determining a time origin of an input RF pulse of a plurality of input RF pulses. The method includes generating an RF echo based on the plurality of input RF pulses, a time-duration between the input RF pulses being controllable in order to determine a time instance corresponding to an ideal position of the RF echo. The method further includes acquiring a data signal corresponding to a scan of a subject, and computing a time-difference between a measured peak of the acquired data signal and the time instance corresponding to the ideal position of the RF echo, the computed time difference corresponding to a measure of a time-shift of an effective magnetic center of the input RF pulse.
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9.发明申请公开(公告)号：US20180017655A1
公开(公告)日：2018-01-18
申请号：US15651272
申请日：2017-07-17
发明人： Mario Zeller
IPC分类号： G01R33/58 , G01R33/561 , G01R33/483
CPC分类号： G01R33/583 , G01R33/4835 , G01R33/5611 , G01R33/5616
摘要： In a method and magnetic resonance (MR) apparatus for recording calibration data for establishing convolution kernels for GRAPPA algorithms for reconstruction of image data from measurement data recorded using echo planar imaging with simultaneous recording of a number of slices of a slice stack. A slice GRAPPA algorithm is used to reconstruct the image data of the individual slices and an inplane GRAPPA algorithm is used to reconstruct undersampled magnetic resonance data within the slices. In order to record the calibration data to be used for establishing the convolution kernels of the two GRAPPA algorithms, in a predetermined slice order for the slices of the slice stack, for one slice in each case, at least one segment of k-space to be sampled is read out in the readout direction for a completely sampled readout in the phase encoding direction, and at least one such segment extends around the center of k-space in the readout direction, and the segment width is selected so that the phase encoding bandwidth matches that of the recording of the measurement data.
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公开(公告)号：US09791531B2
公开(公告)日：2017-10-17
申请号：US14231118
申请日：2014-03-31
申请人： Thomas Beck , Rainer Schneider
发明人： Thomas Beck , Rainer Schneider
CPC分类号： G01R33/543 , G01R33/243 , G01R33/246 , G01R33/583
摘要： A method for establishing a magnetic resonance system actuation sequence is described. A first number of field distribution maps are acquired for slices of the measurement region, and a radiofrequency pulse train is established on the basis thereof for the magnetic resonance system actuation sequence. This acquisition of the first number of field distribution maps may be brought about on the basis of an acquisition scheme. A reduced number of field distribution representation maps are established on the basis of the acquired field distribution maps, which field distribution representation maps represent the first number of acquired field distribution maps in accordance with a predetermined optimization criterion, and the radiofrequency pulse train is established on the basis of the field distribution representation maps.
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