公开(公告)号：US11940521B2

公开(公告)日：2024-03-26

申请号：US17612066

申请日：2020-05-18

申请人： KONINKLIJKE PHILIPS N.V.

发明人： Christoph Gunther Leussler ,  Christian Findeklee ,  Jan Jakob Meineke ,  Peter Vernickel ,  Peter Koken

IPC分类号： G01R33/56 ,  A61B6/00 ,  A61B6/03 ,  G01R33/565 ,  G01R33/567

CPC分类号： G01R33/56509 ,  A61B6/037 ,  A61B6/4417 ,  A61B6/5264 ,  G01R33/5673

摘要： Disclosed is a medical system (100, 300, 500, 700) comprising: a memory (128) storing machine executable instructions (130); a processor (122) configured for controlling the medical system; and a pilot tone system (106). The pilot tone system comprises a radio frequency system (108) comprising multiple transmit channels (110) and multiple receive channels (112). The multiple transmit channels are configured for each transmitting unique pilot tone (132) signals via multiple transmit coils. The multiple receive channels are configured for receiving multi-channel pilot tone data (134) via multiple receive coils. Execution of the machine executable instructions causes the processor to: transmit (200) multi-channel pilot tone signals by controlling at least a portion of the multiple transmit channels to transmit the unique pilot tone signals; acquire (202) multi-channel pilot tone data (134) by controlling at least a portion of the multiple receive channels to receive the multi-channel pilot tone data; and determine (204) a motion state (136) of the subject using the multi-channel pilot tone data.

公开(公告)号：US11933871B2

公开(公告)日：2024-03-19

申请号：US17819348

申请日：2022-08-12

申请人： CANON MEDICAL SYSTEMS CORPORATION

发明人： Shinya Ozawa ,  Takeshi Ishimoto

IPC分类号： G01R33/567 ,  A61B5/00 ,  A61B5/055

CPC分类号： G01R33/5673 ,  A61B5/055 ,  A61B5/7292

摘要： According to one embodiment, MRI apparatus includes processing circuitry and an imaging device. The processing circuitry is configured to acquire at least one of body size information relating to a size of an object and breath-hold information relating to a breath-holdable time of the object. The processing circuitry is further configured to determine an imaging condition to be performed on the object based on the at least one of the body size information and the breath-hold information. The imaging device performs imaging of the object in accordance with the determined imaging condition.

公开(公告)号：US11852705B2

公开(公告)日：2023-12-26

申请号：US17436678

申请日：2020-03-13

申请人： KONINKLIJKE PHILIPS N.V.

发明人： Gabriele Beck ,  Chennakeshava Krishna ,  Suthambhara Nagaraj ,  Johannes Martinus Peeters

IPC分类号： G01V3/00 ,  G01R33/48 ,  G01R33/561 ,  G01R33/563 ,  G01R33/567

CPC分类号： G01R33/4826 ,  G01R33/5611 ,  G01R33/5673 ,  G01R33/5676 ,  G01R33/56308

摘要： The invention relates to a method of MR imaging of an object (10). It is an object of the invention to enable MR imaging using a 3D radial or spiral acquisition scheme providing an enhanced image quality in the presence of motion. The method comprises the steps of: —generating MR signals by subjecting the object (10) to an imaging sequence comprising RF pulses and switched magnetic field gradients; —acquiring the MR signals using a 3D radial or spiral acquisition scheme with oversampling of a central portion (26) of k-space; —detecting motion-induced displacements (d) and/or deformations of the object (10) during the acquisition of the MR signals and assigning each of the acquired MR signals to a motion state; —reconstructing an MR image from the MR signals weighted in the central portion (26) of k-space, wherein a stronger weighting (W, 30) is applied to MR signals acquired in more frequent motion states, while a weaker weighting (W, 31, 32) is applied to MR signals acquired in less frequent motion states. Moreover, the invention relates to a MR device (1) and to a computer program for a MR device (1).

公开(公告)号：US20230384408A1

公开(公告)日：2023-11-30

申请号：US18197812

申请日：2023-05-16

申请人： FUJIFILM Healthcare Corporation

发明人： Ayaka Ikegawa ,  Tomohiro Goto

IPC分类号： G01R33/567 ,  G01R33/54

CPC分类号： G01R33/5673 ,  G01R33/546

摘要： A technique for automatically setting an imaging position is provided, considering a respiratory motion of a subject, thereby reducing a user's burden and enabling robust imaging against variation of an organ position. Using a scout image acquired over at least one cycle of a periodic motion of the subject, the imaging position for a main imaging is determined according to imaging conditions. At this time, a predetermined tissue is extracted from the scout image, and multiple imaging ranges are calculated, including a minimum imaging range that embraces the tissue and a maximum imaging range that embraces a range where the tissue is displaced within the cycle of the periodic motion. Then, according to the imaging conditions, any of the imaging ranges is determined as the imaging position. When the periodic motion is a respiratory motion, the imaging conditions include a breathing method designated by the user, and the imaging range is selected based on thus designated breathing method, and the imaging position (slice position) is automatically set.

公开(公告)号：US11774534B2

公开(公告)日：2023-10-03

申请号：US17653865

申请日：2022-03-07

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

发明人： Xiaomao Gong

IPC分类号： G01V3/00 ,  G01R33/56 ,  G01R33/54 ,  G01R33/483 ,  G01R33/565 ,  A61B5/055 ,  G01R33/561 ,  G01R33/567 ,  G01R33/48

CPC分类号： G01R33/5608 ,  A61B5/055 ,  G01R33/482 ,  G01R33/4835 ,  G01R33/543 ,  G01R33/5613 ,  G01R33/5615 ,  G01R33/5673 ,  G01R33/56509 ,  G01R33/56554

摘要： A method for magnetic resonance imaging (MRI) may include cause, based on a pulse sequence, a magnetic resonance (MR) scanner to perform a scan on an object. The pulse sequence may include a steady-state sequence and an acquisition sequence that is different from the steady-state sequence. The steady-state sequence may correspond to a steady-state phase of the scan in which no MR data is acquired. The acquisition sequence may correspond to an acquisition phase of the scan in which MR data of the object is acquired. The method may also include generating one or more images of the object based on the MR data.

公开(公告)号：US11696729B2

公开(公告)日：2023-07-11

申请号：US16870924

申请日：2020-05-09

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

发明人： Yuhang Shi

IPC分类号： G06K9/00 ,  A61B5/00 ,  G16H40/67 ,  G16H10/60 ,  G16H50/20 ,  A61B5/0245 ,  A61B5/055 ,  A61B6/03 ,  G01R33/567 ,  G06N3/04 ,  G06N5/04 ,  G06T7/00 ,  A61B6/00 ,  G01R33/56

CPC分类号： A61B5/7285 ,  A61B5/0245 ,  A61B5/055 ,  A61B5/7264 ,  A61B6/037 ,  G01R33/5673 ,  G06N3/04 ,  G06N5/04 ,  G06T7/0016 ,  G16H10/60 ,  G16H40/67 ,  G16H50/20 ,  A61B5/0035 ,  A61B6/5247 ,  G01R33/56 ,  G06T2207/10104 ,  G06T2207/20081

摘要： The present disclosure provides a system and method for image data acquisition. The method may include acquiring physiological data of a subject. The physiological data may correspond to a motion of the subject over time. The method may include obtaining a trained machine learning model configured to detect feature data represented in the physiological data. The method may include determining, based on the physiological data, an output result of the trained machine learning model that is generated based on the feature data. The method may include acquiring, based on the output result, image data of the subject using an imaging device.

公开(公告)号：US20230184864A1

公开(公告)日：2023-06-15

申请号：US18163842

申请日：2023-02-02

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

发明人： Ling JI

IPC分类号： G01R33/567 ,  A61B5/11 ,  A61B5/113 ,  A61B5/055 ,  A61B5/25 ,  G01R33/38

CPC分类号： G01R33/5673 ,  A61B5/1102 ,  A61B5/113 ,  A61B5/055 ,  A61B5/25 ,  G01R33/38 ,  A61B2562/0247 ,  A61B2562/0219

摘要： The present disclosure relates to a coil assembly of an MRI device. The MRI device may be configured to perform an MR scan on a subject. The coil assembly may include one or more coil units, a substrate, and a sensor mounted within or on the substrate. The one or more coil units may be configured to receive an MR signal from the subject during the MR scan. The substrate may be configured to position the one or more coil units during the MR scan. The one or more coil units may be mounted within or on the substrate. The sensor may be configured to detect a motion signal relating to a physiological motion of the subject before or during the MR scan.

公开(公告)号：US20230181041A1

公开(公告)日：2023-06-15

申请号：US17921473

申请日：2021-04-26

申请人： Mehdi Hedjazi Moghari ,  Children's Medical Center Corporation

发明人： Henrik Q. Von Kleist ,  Andrew Powell ,  Mehdi Hedjazi Moghari

IPC分类号： A61B5/00 ,  A61B5/024 ,  A61B5/055 ,  G01R33/48 ,  G01R33/563 ,  G01R33/567

CPC分类号： A61B5/0044 ,  A61B5/055 ,  A61B5/02411 ,  A61B5/7257 ,  A61B5/7289 ,  G01R33/482 ,  G01R33/5673 ,  G01R33/56325 ,  A61B2503/02

摘要： Provided herein are systems and methods for generating fetal cardiac magnetic resonance (MR) images of a living fetus, within a uterus of a parent of the fetus, by imaging the fetus within the uterus using a magnetic resonance imaging (MRI) system. Also provided herein are methods for deriving information indicative of fetal cardiac cycles from MR data obtained by an MRI system while imaging the fetus, the MR data including MR data for the center of k-space. The derived information may be used to differentiate the fetal cardiac cycles from other sources of noise in the MR data such as the parental cardiac cycles.

公开(公告)号：US11653854B2

公开(公告)日：2023-05-23

申请号：US17083624

申请日：2020-10-29

申请人： Duke University

发明人： Hal Cecil Charles ,  Brian J. Soher

IPC分类号： A61B5/08 ,  A61B5/055 ,  G01R33/56 ,  A61B5/00 ,  A61M16/00 ,  A61M16/12 ,  G01R33/563 ,  A61M16/10 ,  A61M16/08 ,  A61B5/087 ,  G01R33/567 ,  G01R33/50

CPC分类号： A61B5/0813 ,  A61B5/0033 ,  A61B5/055 ,  A61B5/08 ,  A61B5/082 ,  A61B5/7285 ,  A61M16/0054 ,  A61M16/12 ,  G01R33/5601 ,  G01R33/56325 ,  A61B5/087 ,  A61B2560/0223 ,  A61B2576/02 ,  A61M16/085 ,  A61M16/107 ,  A61M16/1055 ,  A61M2016/1025 ,  A61M2202/0476 ,  A61M2230/432 ,  A61M2230/435 ,  G01R33/50 ,  G01R33/5673 ,  G01R33/56366

摘要： Systems and methods for generating MRI images of the lungs and/or airways of a subject using a medical grade gas mixture comprises between about 20-79% inert perfluorinated gas and oxygen gas. The images are generated using acquired 19F magnetic resonance image (MRI) signal data associated with the perfluorinated gas and oxygen mixture.

公开(公告)号：US20180303374A1

公开(公告)日：2018-10-25

申请号：US16016984

申请日：2018-06-25

申请人： UNIVERSITY OF UTAH RESEARCH FOUNDATION

发明人： Nassir F. Marrouche ,  Evgueni G. Kholmovski

IPC分类号： A61B5/055 ,  G01R33/50 ,  G01R33/567 ,  G01R33/56 ,  G01R33/48 ,  G01R33/54 ,  A61B5/0452 ,  A61B5/046

CPC分类号： A61B5/055 ,  A61B5/0452 ,  A61B5/046 ,  G01R33/4818 ,  G01R33/50 ,  G01R33/543 ,  G01R33/546 ,  G01R33/5601 ,  G01R33/5602 ,  G01R33/5673

摘要： A method of optimizing scan parameters for LGE-MRI. At least one cardiac MRI TI scout scan is performed by applying an inversion pulse every predetermined heartbeat of a patient. An initial value of an inversion time TIinitial is determined by assessing a set of images generated from the scout scan. A first multiple of a duration between successive indicia of ventricular depolarization is selected, and a relaxation time T1 is determined based on the initial value Tinitial and the first multiple of duration. An optimized inversion time TIoptimal for LGE-MRI is determined based on the relaxation time T1 and a second multiple of a duration between successive indicia of ventricular depolarization. A correction factor is determined based on the optimized inversion time TIoptimal from the initial value of the inversion time TIinitial.