公开(公告)号：US20250052843A1

公开(公告)日：2025-02-13

申请号：US18446898

申请日：2023-08-09

Applicant: GE Precision Healthcare LLC

Inventor： Florintina C ,  Suresh Emmanuel Devadoss Joel ,  Sajith Rajamani ,  Preetham Shankpal ,  Megha Goel ,  Sudhanya Chatterjee

IPC: G01R33/565 ,  G01R33/48 ,  G01R33/56 ,  G06T5/00

Abstract: A system and method for improving image quality of periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER) imaging include acquiring a plurality of blades of k-space data of a region of interest in a rotational manner around a center of k-space via a magnetic resonance imaging (MRI) scanner from a coil during a PROPELLER sequence, wherein each blade of the plurality of blades of k-space data includes a plurality of parallel phase encoding lines sampled in a phase encoding order. The system and method also include utilizing a deep learning-based denoising network to denoise each blade of the plurality of blades of k-space data to generate a plurality of denoised blades. The system and method further include utilizing a PROPELLER reconstruction algorithm to generate a complex image from the plurality of denoised blades.

公开(公告)号：US12210081B2

公开(公告)日：2025-01-28

申请号：US17954483

申请日：2022-09-28

Applicant: Siemens Healthcare GmbH

Inventor： Fang Dong ,  Yan Tu Huang

IPC: G01V3/00 ,  G01R33/54 ,  G01R33/565 ,  G06T5/00 ,  G06T5/50

Abstract: In a motion correction method, a reference navigation image is obtained before MR data collection is performed on a target region of interest; in a process of performing the MR data collection on the target region of interest, motion detection is performed using a pilot tone signal received by a plurality of coils, and when a motion is detected, MR data collected when the motion occurs is marked as motion damage data; a post-motion navigation image is obtained when the end of the motion is detected by utilizing the pilot tone signal; registration is performed on the post-motion navigation image and the reference navigation image to obtain a motion correction parameter corresponding to the motion; and motion correction on the MR data collection is performed using the motion correction parameter. The method according to the present disclosure advantageously improves MR imaging quality.

公开(公告)号：US12210080B2

公开(公告)日：2025-01-28

申请号：US17955924

申请日：2022-09-29

Applicant: David Leitão ,  Raphael Tomi-Tricot ,  Joseph V. Hajnal ,  Shaihan Malik

Inventor： David Leitão ,  Raphael Tomi-Tricot ,  Joseph V. Hajnal ,  Shaihan Malik

IPC: G01V3/00 ,  G01R33/48 ,  G01R33/54 ,  G01R33/565

Abstract: A method of operating a magnetic resonance scanner includes determining a radio frequency (RF) pulse to be transmitted to jointly homogenize a flip angle and a semisolid saturation that would result from magnetization of a sample to be scanned by the MR scanner using the determined RF pulse. The method also includes controlling an RF transmit coil of the MR scanner to transmit the determined pulse. Homogenizing both semisolid saturation and excitation properties of the RF pulse allows for improved magnetic transfer ratio imaging.

公开(公告)号：US12207911B2

公开(公告)日：2025-01-28

申请号：US17364845

申请日：2021-06-30

Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

Inventor： James Balter ,  Yue Cao ,  Lianli Liu ,  Adam Johansson

IPC: A61B5/055 ,  G01R33/565 ,  G06T7/207 ,  G01R33/48

Abstract: The following relates generally to motion prediction in magnetic resonance (MR) imaging. In some embodiments, a “modular” approach is taken to motion correction. That is, individual motion sources (e.g., a patient's breathing, heartbeat, stomach contractions, peristalsis, and so forth) are accounted for individually in the motion correction. In some embodiments, to correct for a particular motion source, a reference state is created from a volume of interest (VOI), and other states are created and deformably aligned to the reference state.

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：US12201410B2

公开(公告)日：2025-01-21

申请号：US17646856

申请日：2022-01-03

Applicant: The Board of Trustees of the Leland Stanford Junior University

Inventor： Nolan Williams ,  Keith Sudheimer

IPC: A61N2/00 ,  A61B5/00 ,  A61B5/024 ,  A61B5/16 ,  A61N2/02 ,  G01R33/48 ,  G01R33/565 ,  G16H20/30 ,  G16H50/30

Abstract: Systems and methods for clinical neuronavigation in accordance with embodiments of the invention are illustrated. One embodiment includes a method for generating a brain stimulation target, including obtaining functional magnetic resonance imaging (fMRI) image data of a patient's brain, where brain imaging data describes neuronal activations within the patient's brain, determining a brain stimulation target by mapping at least one region of interest to the patient's brain, locating functional subregions within the at least one region of interest based on the fMRI image data, determining functional relationships between at least two brain regions of interest, generating parameters for each functional subregion, generating a target quality score for each functional subregion based on the parameters and selecting a brain stimulation target based on its target quality score and the patient's neurological condition.

公开(公告)号：US12189004B2

公开(公告)日：2025-01-07

申请号：US18164362

申请日：2023-02-03

Applicant: Vanderbilt University

Inventor： Kevin Harkins ,  Mark D. Does

IPC: G01R33/24 ,  G01R33/565

Abstract: Accurate measurement of gradient waveform errors can often improve image quality in sequences with time varying readout and excitation waveforms. Self-encoding or offset-slice method sequences are commonly used to measure gradient waveforms. However, the self-encoding method requires a long scan time, while the offset-slice method is often low precision, requiring the thickness of the excited slice to be small compared to the maximal k-space encoded by the test waveform. This disclosure describes a novel hybrid of those methods, referred to as variable-prephasing (VP). Like the offset-slice method, VP uses the change in signal phase from offset-slices to calculate the gradient waveform. Similar to the self-encoding method, repeated acquisitions with a variable amplitude self-encoding gradient mitigates the signal loss due to phase wrapping, which, in-turn, allows thicker slices and greater SNR.

公开(公告)号：US12174281B2

公开(公告)日：2024-12-24

申请号：US17947761

申请日：2022-09-19

Applicant: Regents of the University of Minnesota ,  Duke University

Inventor： Oren Solomon ,  Noam Harel ,  Guillermo Sapiro ,  Edward Auerbach ,  Steen Moeller ,  Remi Patriat ,  Henry Braun ,  Tara Palnitkar

IPC: G01R33/565 ,  A61B5/055 ,  G01R33/56

Abstract: A system and method are provided for creating magnetic resonance (MR) images with reduced motion artifacts from the MR data from which the images are produced. The method includes selecting a candidate image from a plurality of candidate images reconstructed from the MR data. The method also includes registering the candidate image to a reference image, comparing the candidate image to a consistency map, and, based on comparing the candidate image using the consistency map, selecting a blending algorithm. The method also includes generating a blended image using the blending algorithm and the candidate image and repeating these steps for each candidate image. The method also includes performing a Fourier aggregation to generate a combined image and displaying the combined image with reduced motion artifacts compared to the plurality of candidate images.

公开(公告)号：US20240402277A1

公开(公告)日：2024-12-05

申请号：US18633143

申请日：2024-04-11

Applicant: FUJIFILM Healthcare Corporation

Inventor： Kosuke Ito ,  Atsushi Kuratani

IPC: G01R33/565 ,  G01R33/561

Abstract: Provided is an MRI using a GRE-based pulse sequence in which flow artifacts are suppressed and a flow artifact-free image is obtained regardless a velocity or a direction of blood flow. A pair of gradient magnetic field pulses (velocity encoding gradient magnetic field pulses) is applied before echo measurement of a GRE-based pulse sequence, and imaging is performed a plurality of times by varying intensities of the velocity encoding gradient magnetic field pulses. Measurement data obtained by imaging a plurality of times is subjected to a Fourier transformation in an axial direction of the intensity of the velocity encoding gradient magnetic field pulse, that is, in a velocity encoding direction, to perform image reconstruction. As a result, an image can be separated for each velocity of a stationary tissue and a non-stationary component included in the tissue, and an image of spins with a velocity of zero, that is, a flow artifact-free image of the stationary tissue, can be obtained.

公开(公告)号：US20240385271A1

公开(公告)日：2024-11-21

申请号：US18664645

申请日：2024-05-15

Applicant: Siemens Healthineers AG

Inventor： Thorsten Feiweier ,  Mario Zeller ,  Adam Kettinger ,  Michael Köhler ,  Max Müller

IPC: G01R33/561 ,  G01R33/483 ,  G01R33/565

Abstract: Method for separating measurement data of an examination object, which data was acquired in collapsed form simultaneously for slices using an EPI SMS technique, into measurement data of individual slices, first and second sets of reference measurement data for separating the measurement data are acquired for each of the slices using a GRE acquisition technique, wherein the reference measurement data in the first set is acquired during switching of readout gradients of a first polarity, and the reference measurement data in the second set is acquired during switching of readout gradients of a second polarity. Based on the two sets of reference measurement data, corresponding separate first calibration data is determined from the reference measurement data acquired using a GRE acquisition technique while switching readout gradients of a first polarity, and second calibration data is determined from the reference measurement data acquired while switching readout gradients of a second polarity.