公开(公告)号：EP4127754A1

公开(公告)日：2023-02-08

申请号：EP21712864.4

申请日：2021-03-23

申请人： Koninklijke Philips N.V.

发明人： NEELAVALLI, Jaladhar

IPC分类号： G01R33/48 ,  G01R33/56 ,  A61B5/00 ,  G01R33/483 ,  G01R33/561

公开(公告)号：EP4343356A1

公开(公告)日：2024-03-27

申请号：EP22197279.7

申请日：2022-09-23

申请人： Koninklijke Philips N.V.

发明人： RUDRAPATNA, Umesh Suryanarayana ,  KASIREDDY, Viswanatha Reddy ,  NAGARAJ, Suthambhara ,  NEELAVALLI, Jaladhar ,  JAYAPALAN, Manivannan ,  SARASWATHY, Suja ,  THAZHACKAL, Sharun S

IPC分类号： G01R33/48 ,  G01R33/44 ,  G01R33/24 ,  G01R33/565 ,  G01R33/56 ,  G01R33/561

摘要： The invention relates to a method of MR imaging of an object (10) placed in a main magnetic field (B 0 ) within an examination volume of an MR system (1). It is an object of the invention to provide an improved MR imaging technique in which B 0 mapping is performed with no or only minimal additional scan time. The method of the invention comprises the steps of: subjecting the object (10) to a first imaging sequence to generate a first set of MR signals at a first echo time, acquiring the first set of MR signals from the object (10), subjecting the object (10) to a second imaging sequence to generate a second set of MR signals at a second echo time which is different from the first echo time, wherein the first and second imaging sequences further differ with respect to at least one of: field of view, image resolution, repetition time, k-space sampling pattern, relaxation time weighting, acquiring the second set of MR signals from the object (10), and deriving a water map, a fat map, and a B 0 map from the first and second sets of MR signals using a Dixon method. Moreover, the invention relates to an MR system (1) and to a computer program to be run on an MR system (1).

公开(公告)号：EP4030179A1

公开(公告)日：2022-07-20

申请号：EP21152221.4

申请日：2021-01-19

申请人： Koninklijke Philips N.V.

发明人： NEELAVALLI, Jaladhar ,  RUDRAPATNA, Umesh Suryanarayana ,  THAZHACKAL, Sharun S ,  M S, Vidya ,  SARASWATHY, Suja ,  SRINIVASAN, Ashvin

IPC分类号： G01R33/565 ,  G01R33/3875 ,  G01R33/56 ,  G01R33/48

摘要： Proposed concepts aim to provide schemes, solutions, concepts, designs, methods, systems, and a computer program pertaining to predicting a field perturbation map for magnetic resonance imaging (MRI) of a subject. In particular, the invention aims to provide a field perturbation map of the subject without the need for additional time-consuming scans of the subject. An accurate field perturbation map is necessary in order to obtain an MRI scan of the subject of high quality. Accordingly, a synthetic computed tomography (CT) image is generated by inputting an initial MRI magnitude image of the subject to an image conversion machine learning algorithm. Subsequently, a weighted susceptibility map of the subject is determined based on the synthetic CT image and the initial MRI magnitude image, which is in turn used to determine the field perturbation map of the subject.

公开(公告)号：EP4455707A1

公开(公告)日：2024-10-30

申请号：EP23169723.6

申请日：2023-04-25

申请人： Koninklijke Philips N.V.

发明人： SHARMA, Sumit ,  P S, Viswanath ,  HEGDE, Amruta Venkatraman ,  SARASWATHY, Suja ,  ADHIKARY, Dhruba ,  ALI MATTATHODI, Razeem Ahmad ,  NEELAVALLI, Jaladhar ,  NARAYANAN, Prasad ,  VS, Vineeth

IPC分类号： G01R33/56 ,  A61B5/055 ,  G06T7/10

摘要： System (FS) and related method for facilitating image acquisition in medical imaging, comprising an input interface (IN) for receiving, when the system is in use, an input image volume of an object in an examination region (ER) of an imaging apparatus (IA). The system may include a plane segmentor (PD) to segment for an imaging plane (E) in the volume ( V0 ), to so obtain a segmentation result, the said segmentation result including the said imaging plane as a subset in the volume. The system may further include an output interface (OUT) for providing output data in relation to the said imaging plane for controlling a data acquisition operation of the imaging apparatus.

公开(公告)号：EP4419934A1

公开(公告)日：2024-08-28

申请号：EP22808653.4

申请日：2022-10-19

申请人： Koninklijke Philips N.V.

发明人： NIELSEN, Tim ,  WUELBERN, Jan Hendrik ,  LIPS, Oliver ,  BOERNERT, Peter Ulrich ,  NEHRKE, Kay ,  THAZHZCKAL, Sharun S ,  SARASWATHY, Suja ,  JAYAPALAN, Manivannan ,  SRINIVASAN, Ashvin ,  RUDRAPATNA, Umesh Suryanarayana ,  NEELAVALLI, Jaladhar

IPC分类号： G01R33/3875 ,  G01R33/56 ,  G01R33/565 ,  G01R33/58

CPC分类号： G01R33/3875 ,  G01R33/5608 ,  G01R33/5659 ,  G01R33/583

公开(公告)号：EP3926355A1

公开(公告)日：2021-12-22

申请号：EP20179903.8

申请日：2020-06-15

申请人： Koninklijke Philips N.V.

发明人： RUDRAPATNA, Umesh ,  NEELAVALLI, Jaladhar ,  GOPALAKRISHNAN, Karthik ,  NAGARAJ, Suthambhara ,  BAJAJ, Naveen ,  VAKKACHI KANDI, Rupesh

IPC分类号： G01R33/24 ,  G01R33/3875 ,  G01R33/54 ,  G01R33/565 ,  G06N3/02 ,  A61B5/055 ,  G01R33/48 ,  G01R33/483 ,  G01R33/561 ,  G06N3/08 ,  G01R33/56

摘要： Disclosed herein is a medical system (100, 300, 500) comprising a memory (110) storing machine executable instructions (120) and a Bo field estimation module (126); and a computational system (106). Execution of the machine executable instructions causes the computational system to receive (200) an initial magnetic resonance image (122) that comprises a magnitude component and is descriptive of a first region (326) of interest of a subject (118). Execution of the machine executable instructions further causes the computational system to perform at least one iteration of the following: receive (202) subsequent k-space data (124) descriptive of a subsequent region of interest (328) of the subject; calculate (204) an estimated Bo field mapping (128) for the subsequent region of interest from the initial magnetic resonance image by inputting the initial magnetic resonance image into the Bo field estimation module; and reconstruct (206) a corrected magnetic resonance image (130) from the subsequent k-space data and the estimated Bo field mapping.

公开(公告)号：EP4170372A1

公开(公告)日：2023-04-26

申请号：EP21204137.0

申请日：2021-10-22

申请人： Koninklijke Philips N.V.

发明人： NIELSEN, Tim ,  WUELBERN, Jan Hendrik ,  LIPS, Oliver ,  BOERNERT, Peter ,  NEHRKE, Kay ,  THAZHZCKAL, Sharun S ,  SARASWATHY, Suja ,  JAYAPALAN, Manivannan ,  SRINIVASAN, Ashvin ,  RUDRAPATNA, Umesh ,  NEELAVALLI, Jaladhar

IPC分类号： G01R33/3875 ,  G01R33/56 ,  G01R33/565 ,  G01R33/58

摘要： A magnetic resonance examination system comprising a main magnet for applying a uniform static magnetic field. An active shim system applies shim magnetic fields to correct for inhomogeneities of the static magnetic field. A shim driver system activates the active shim system on the basis of B 0 -shim settings. A trained machine-learning module is trained to return the B 0 -shim settings from one or more actual load parameters. The magnetic resonance examination system may further comprise an RF transmit system with RF antenna elements and an RF driver system to activate the RF antenna elements for applying a (B 1 ) radio frequency field having a predetermined spatial distribution. An RF shim system to control the RF driver system to apply shim radio frequency fields to correct for deviation of the radio frequency field's spatial distribution from the predetermined spatial distribution on the basis of RF-shim settings. A trained machine-learning module trained to return the RF-shim settings from one or more actual load parameters.

公开(公告)号：EP4165425A1

公开(公告)日：2023-04-19

申请号：EP21731500.1

申请日：2021-06-10

申请人： Koninklijke Philips N.V.

发明人： RUDRAPATNA, Umesh, Suryanarayana ,  NEELAVALLI, Jaladhar ,  GOPALAKRISHNAN, Karthik ,  NAGARAJ, Suthambhara ,  BAJAJ, Naveen ,  VAKKACHI KANDI, Rupesh

IPC分类号： G01R33/24 ,  G01R33/3875 ,  G01R33/54 ,  G01R33/565 ,  G06N3/02 ,  A61B5/055 ,  G01R33/48 ,  G01R33/483 ,  G01R33/561 ,  G06N3/08 ,  G01R33/56

公开(公告)号：EP4027161A1

公开(公告)日：2022-07-13

申请号：EP21150639.9

申请日：2021-01-08

申请人： Koninklijke Philips N.V.

发明人： MS, Vidya ,  RUDRAPATNA, Umesh Suryanarayana ,  JAGANNATHA, Vijayananda ,  SRINIVASAN, Ashvin ,  NEELAVALLI, Jaladhar ,  THAZHACKAL, Sharun S ,  SARASWATHY, Suja

IPC分类号： G01R33/565 ,  G01R33/58

摘要： Proposed concepts thus aim to provide schemes, solutions, concept, designs, methods and systems pertaining to updating a magnetic field (Bo) map of a subject during a magnetic resonance imaging (MRI) examination or during image reconstruction. In particular, when a subject moves, the magnetic field inside the magnetic bore changes. As a result, any Bo map obtained prior to the movement of the subject may be inaccurate. Accordingly, an initial Bo map is updated to reflect changes in the Bo map caused by the movement of the subject. This can be achieved by determining a Bo map of the subject based on a Bo prediction model, instead of spending additional scanning time to acquire another Bo map.

公开(公告)号：EP3885780A1

公开(公告)日：2021-09-29

申请号：EP20165834.1

申请日：2020-03-26

申请人： Koninklijke Philips N.V.

发明人： NEELAVALLI, Jaladhar

IPC分类号： G01R33/48 ,  A61B5/00 ,  G01R33/483 ,  G01R33/56 ,  G01R33/561

摘要： Disclosed herein is a method of medical imaging. The method comprises receiving (202) gradient echo magnetic resonance imaging data (123) descriptive of a breast region (319) of a subject (318). The method further comprises receiving (202) DIXON magnetic resonance imaging data descriptive of the breast region. The DIXON magnetic resonance imaging data and the gradient echo magnetic resonance imaging data are spatially matched. The method further comprises generating (204) a breast micro-calcification magnetic resonance image (128) by inputting the gradient echo magnetic resonance imaging data and the DIXON magnetic resonance imaging data into a breast micro-calcification image reconstruction module (122). The breast micro-calcification image reconstruction module is configured to output a breast micro-calcification magnetic resonance image in response to inputting the gradient echo magnetic resonance imaging data and the DIXON magnetic resonance imaging data. The breast micro-calcification magnetic resonance image is descriptive of a location of breast micro-calcifications, wherein the gradient echo magnetic resonance imaging data is a phase image.