公开(公告)号：US12204007B2

公开(公告)日：2025-01-21

申请号：US18008193

申请日：2021-06-10

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Umesh Suryanarayana Rudrapatna ,  Jaladhar Neelavalli ,  Karthik Gopalakrishnan ,  Suthambhara Nagaraj ,  Naveen Bajaj ,  Rupesh Vakkachi Kandi

IPC: G01R33/56 ,  A61B5/055 ,  G01R33/3875 ,  G01R33/48 ,  G01R33/54 ,  G01R33/561 ,  G01R33/565 ,  G06N3/02

Abstract: Disclosed herein is a medical system (100, 300, 500) comprising a memory (110) storing machine executable instructions (120) and a B0 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 subsequent region of interest (328) of the subject; calculate (204) an estimated B0 field mapping (128) for the subsequent region of interest from the initial magnetic resonance image by inputting the initial magnetic resonance image into the B0 field estimation module; and reconstruct (206) a corrected magnetic resonance image (130) from the subsequent k-space data and the estimated B0 field mapping.

公开(公告)号：US20240118360A1

公开(公告)日：2024-04-11

申请号：US18270250

申请日：2021-12-29

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Vidya MS ,  Umesh Suryanarayana Rudrapatna ,  Vijayananda Jagannatha ,  Ashvin Srinivasan ,  Jaladhar Neelavalli ,  Sharun S Thazhackal ,  Suja Saraswathy

IPC: G01R33/565 ,  G01R33/3875

CPC classification number: G01R33/56509 ,  G01R33/3875

Abstract: Proposed concepts thus aim to provide schemes, solutions, concept, designs, methods and systems pertaining to updating a magnetic field (B0) 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 B0 map obtained prior to the movement of the subject may be inaccurate. Accordingly, an initial B0 map is updated to reflect changes in the B0 map caused by the movement of the subject. This can be achieved by determining a B0 map of the subject based on a B0 prediction model, instead of spending additional scanning time to acquire another B0 map.

公开(公告)号：US20240077565A1

公开(公告)日：2024-03-07

申请号：US18272606

申请日：2022-01-13

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Jaladhar Neelavalli ,  Umesh Suryanarayana Rudrapatna ,  Sharun S Thazhackal ,  Vidya Madapusi Srinivas Prasad ,  Suja Saraswathy ,  Ashvin Srinivasan

IPC: G01R33/565 ,  G01R33/48 ,  G01R33/56

CPC classification number: G01R33/56509 ,  G01R33/4812 ,  G01R33/5608

Abstract: Proposed concepts thus aim to provide schemes, solutions, concepts, designs, methods and systems 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：US20230280429A1

公开(公告)日：2023-09-07

申请号：US18008193

申请日：2021-06-10

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Umesh Suryanarayana Rudrapatna ,  Jaladhar Neelavalli ,  Karthik Gopalakrishnan ,  Suthambhara Nagaraj ,  Naveen Bajaj ,  Rupesh Vakkachi Kandi

IPC: G01R33/56 ,  A61B5/055 ,  G01R33/561 ,  G01R33/565 ,  G01R33/54 ,  G01R33/3875 ,  G01R33/48 ,  G06N3/02

CPC classification number: G01R33/5608 ,  A61B5/055 ,  G01R33/5611 ,  G01R33/56509 ,  G01R33/543 ,  G01R33/3875 ,  G01R33/56518 ,  G01R33/56563 ,  G01R33/4824 ,  G01R33/5616 ,  G06N3/02

Abstract: Disclosed herein is a medical system (100, 300, 500) comprising a memory (110) storing machine executable instructions (120) and a B0 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 subsequent region of interest (328) of the subject; calculate (204) an estimated B0 field mapping (128) for the subsequent region of interest from the initial magnetic resonance image by inputting the initial magnetic resonance image into the B0 field estimation module; and reconstruct (206) a corrected magnetic resonance image (130) from the subsequent k-space data and the estimated B0 field mapping.