公开(公告)号：US12111375B2

公开(公告)日：2024-10-08

申请号：US17808405

申请日：2022-06-23

申请人： CANON MEDICAL SYSTEMS CORPORATION

发明人： Masanori Ozaki ,  Masao Yui

IPC分类号： G01R33/561 ,  G01R33/44 ,  G01R33/483 ,  G01R33/56

CPC分类号： G01R33/561 ,  G01R33/446 ,  G01R33/5605 ,  G01R33/5613 ,  G01R33/4833

摘要： An MRI apparatus according to an embodiment includes sequence controlling circuitry, in a first transition period, repeating application of a first MT pulse and acquisition of a first MR signal to a first frequency region being a part of a k-space; in the first steady state, repeating application of the first MT pulse and acquisition of a second MR signal to a second frequency region of the k-space, frequency in second frequency region being lower than frequency in the first frequency region; and in a second transition period, repeating application of a second MT pulse and acquisition of a third MR signal to a third frequency region being another part of the k-space, frequency in the third frequency region being higher than the frequency in the second frequency region, and processing circuitry generating one MR image on basis of the first, second, and third MR signal.

公开(公告)号：US11963752B2

公开(公告)日：2024-04-23

申请号：US16798265

申请日：2020-02-21

申请人： SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.

发明人： Jingyuan Lyu ,  Qi Liu ,  Zhongqi Zhang ,  Jian Xu

IPC分类号： A61B5/055 ,  A61B6/00 ,  A61B6/03 ,  G01R33/24 ,  G01R33/46 ,  G01R33/48 ,  G01R33/483 ,  G01R33/561 ,  G01R33/563 ,  G01R33/565 ,  G06T3/00 ,  G06T7/00 ,  G06T7/215 ,  G06T7/262 ,  G06T7/269 ,  G06T9/00 ,  G06T11/00

CPC分类号： A61B5/055 ,  G01R33/4616 ,  G01R33/4818 ,  G01R33/561 ,  G01R33/56316 ,  G01R33/56563 ,  G01R33/5659 ,  G06T7/0016 ,  G06T9/008 ,  G06T11/003 ,  G06T11/005 ,  G06T11/008 ,  A61B6/032 ,  A61B6/5205 ,  G01R33/243 ,  G01R33/4833 ,  G01R33/5611 ,  G01R33/5617 ,  G01R33/5618 ,  G01R33/5619 ,  G01R33/56341 ,  G06T3/0087 ,  G06T7/0012 ,  G06T7/215 ,  G06T7/262 ,  G06T7/269 ,  G06T2207/10072 ,  G06T2207/10084 ,  G06T2207/10088 ,  G06T2207/10092 ,  G06T2207/10096 ,  G06T2207/10104 ,  G06T2207/10108 ,  G06T2207/10132 ,  G06T2207/10136 ,  G06T2207/20182 ,  G06T2207/30004 ,  G06T2207/30048 ,  G06T2210/41 ,  G06T2210/52 ,  G06T2211/40 ,  G06T2211/416

摘要： An imaging method may include obtaining imaging data associated with a region of interest (ROI) of an object. The imaging data may correspond to a plurality of time-series images of the ROI. The imaging method may also include determining, based on the imaging data, a data set including a spatial basis and one or more temporal bases. The spatial basis may include spatial information of the imaging data. The one or more temporal bases may include temporal information of the imaging data. The imaging method may also include storing, in a storage medium, the spatial basis and the one or more temporal bases.

公开(公告)号：US11864863B2

公开(公告)日：2024-01-09

申请号：US17475687

申请日：2021-09-15

申请人： John Thomas Vaughan, Jr. ,  Sairam Geethanath ,  Sachin Jambawalikar ,  Pavan Poojar ,  Enlin Qian

发明人： John Thomas Vaughan, Jr. ,  Sairam Geethanath ,  Sachin Jambawalikar ,  Pavan Poojar ,  Enlin Qian

IPC分类号： A61B5/00 ,  A61B5/055 ,  G01R33/56 ,  G01R33/561

CPC分类号： A61B5/0042 ,  A61B5/055 ,  G01R33/561 ,  G01R33/5602

摘要： An exemplary system, method, and computer-accessible medium for generating a particular image which can be a quantitative image(s) of at least one section(s) of a patient(s) or (ii) a non-synthetic contrast image(s) of the section(s) of the patient(s), can include, for example, generating a first magnetic resonance (MR) signal and detecting the first MR signal to patient(s), receiving a second MR signal from the patient(s) that can be based on the first MR signal, and generating the particular image(s) based on the second MR signal. The first MR signal can be a configured MR signal. The configured MR signal can be configured for a particular contrast. The first MR signal can have a constant signal intensity. The first MR signal can be generated based on a degree of a plurality of flip angles that maintains the constant signal intensity. A degree of flip angles can be selected for the first MR signal based on the particular contrast.

公开(公告)号：US20230341493A1

公开(公告)日：2023-10-26

申请号：US18010118

申请日：2021-06-21

申请人： CONSEJO SUPERIOR DE INVESTIGACIONES CIENTÍFICAS (CSIC) ,  UNIVERSITAT POLITÈCNICA DE VALÈNCIA

发明人： Fernando GALVE ,  Joseba ALONSO ,  Jose Miguel ALGARÍN ,  José Maria BENLLOCH

IPC分类号： G01R33/561 ,  G01R33/48

CPC分类号： G01R33/561 ,  G01R33/482 ,  G01R33/4824

摘要： The invention provides a method for performing magnetic resonance imaging, MRI, which exploits prior knowledge of the interactions between electromagnetic fields and spins in the sampled object. This technique is able to provide shorter acquisition times with respect to traditional (Nyquist-Shannon limited) MRI. The method is based on an encoding matrix formalism constructed from the specific knowledge of how every spin would evolve in time depending on their position for a given pulse sequence. This particular previous knowledge has not been fully exploited previously by traditional MRI techniques. Moreover, the method of the invention can be used in combination with other schemes, such as compressed sensing, parallel imaging, or deep learning, for further shortening the MRI scan time.

公开(公告)号：US11740305B2

公开(公告)日：2023-08-29

申请号：US17576026

申请日：2022-01-14

申请人： Siemens Healthcare GmbH

发明人： Alto Stemmer

IPC分类号： G01V3/00 ,  G01R33/483 ,  G01R33/561 ,  G01R33/565 ,  G01R33/56

CPC分类号： G01R33/4835 ,  G01R33/561 ,  G01R33/5602 ,  G01R33/5659

摘要： The present disclosure is directed to controlling a magnetic resonance imaging system for generating magnetic resonance image data from an object under examination, in which magnetic resonance raw data is captured, and at least one multi-slice STEAM pulse sequence is generated. The multi-slice STEAM pulse sequence comprises one excitation module for each slice, in each of which are generated a first slice-selective RF excitation pulse and a second slice-selective RF pulse, and one readout module for each slice for acquiring magnetic resonance raw data, which readout module comprises a third slice-selective RF pulse and further sequence elements for spatial encoding and for receiving RF signals. Between the excitation module and the readout module of a first slice is implemented at least one excitation module or one readout module for another slice.

公开(公告)号：US20230266417A1

公开(公告)日：2023-08-24

申请号：US18113805

申请日：2023-02-24

申请人： The Board of Trustees of the Leland Stanford Junior University

发明人： Zheng Zhong ,  Christopher Michael Sandino ,  Shreyas S. Vasanawala

IPC分类号： G01R33/561 ,  G01R33/56

CPC分类号： G01R33/561 ,  G01R33/5608

摘要： A method for magnetic resonance imaging (MRI) performs a spoiled gradient-recalled (SPGR) MRI scan with an MRI scanner to produce MRI data; and reconstructs an MRI image from the MRI data; wherein performing the SPGR MRI scan comprises playing an interleaved-randomized spoiler (IRS) gradient after every M-th acquisition block, where M≥2, and where an absolute area of the IRS gradient of each IRS is randomized between zero and a maximum gradient area achievable on the MRI scanner.

公开(公告)号：US20180306882A1

公开(公告)日：2018-10-25

申请号：US15495588

申请日：2017-04-24

申请人： Cedars-Sinai Medical Center

发明人： Debiao LI ,  Anthony G. CHRISTODOULOU ,  Jaime SHAW ,  Yibin XIE ,  Christopher NGUYEN

IPC分类号： G01R33/56 ,  A61B5/055 ,  G06K9/36

CPC分类号： G01R33/56 ,  A61B5/055 ,  G01N2800/32 ,  G01R33/50 ,  G01R33/5602 ,  G01R33/561 ,  G01R33/5613 ,  G01V3/00 ,  G06K9/3233 ,  G06K9/36 ,  G06K9/6249 ,  G06K9/6256 ,  G06K2209/051 ,  G06T3/00

摘要： A new low rank tensor (LRT) imaging strategy/methodology, specifically for quantitative cardiovascular magnetic resonance (CMR) multitasking, includes performing a low-rank tensor image model exploiting image correlation along multiple physiological and physical time dimensions, a non-ECG data acquisition strategy featuring minimal gaps in acquisition and frequent collection of auxiliary subspace training data, and a factored tensor reconstruction approach which enforces the LRT model.

公开(公告)号：US20180292498A1

公开(公告)日：2018-10-11

申请号：US15947046

申请日：2018-04-06

申请人： Mayo Foundation for Medical Education and Research

发明人： Yunhong Shu ,  Matthew A. Bernstein ,  Shengzhen Tao ,  Joshua D. Trzasko

IPC分类号： G01R33/561 ,  G01R33/46 ,  G01R33/54 ,  G01R33/483 ,  G01R33/385

CPC分类号： G01R33/5612 ,  G01R33/385 ,  G01R33/4633 ,  G01R33/4818 ,  G01R33/4826 ,  G01R33/4831 ,  G01R33/543 ,  G01R33/561

摘要： An asymmetric 3D shells k-space trajectory design with partial Fourier acceleration is described. A non-iterative homodyne reconstruction framework is also described.

公开(公告)号：US20180292492A1

公开(公告)日：2018-10-11

申请号：US15944637

申请日：2018-04-03

申请人： Case Western Reserve University

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

IPC分类号： G01R33/561 ,  G01R33/34 ,  G01R33/38 ,  G01R33/56 ,  G01R33/50 ,  A61B5/055

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：US20180292486A1

公开(公告)日：2018-10-11

申请号：US15946922

申请日：2018-04-06

申请人： Case Western Reserve University ,  The General Hospital Corporation

发明人： Vikas Gulani ,  Mark A. Griswold ,  Alice Yang ,  Yun Jiang ,  Kawin Setsompop

IPC分类号： G01R33/483 ,  G01R33/56 ,  G01R33/24 ,  G01R33/54 ,  G01R33/50

CPC分类号： G01R33/4835 ,  G01R33/243 ,  G01R33/246 ,  G01R33/50 ,  G01R33/543 ,  G01R33/5608 ,  G01R33/561

摘要： A magnetic resonance fingerprinting (“MRF”) framework that implements simultaneous multislice acquisition techniques with a Hadamard RF-encoding to simultaneously acquire magnetic resonance data from multiple slices simultaneously is described. As one non-limiting example, magnetic resonance data can be simultaneously acquired from four different slices. In other embodiments, however, the Hadamard encoding can be condensed into one or two acquisitions, rather than four.