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.

公开(公告)号：US20240295621A1

公开(公告)日：2024-09-05

申请号：US18592973

申请日：2024-03-01

Applicant: Siemens Healthineers AG

Inventor： Thorsten Feiweier ,  Max Müller ,  Adam Kettinger ,  Mario Zeller ,  Gudrun Ruyters

IPC: G01R33/54 ,  G01R33/56 ,  G01R33/563

CPC classification number: G01R33/543 ,  G01R33/5608 ,  G01R33/56341

Abstract: A method for preparing magnetic resonance imaging of an object under examination is described. A plurality of representative pulse sequence segments are generated, each of which is associated with a reference gradient amplitude of the gradient pulse having the highest stimulation potential of the representative pulse sequence segment, and the stimulation potential of which is representative of a group of partially different pulse sequences. For each of the representative pulse sequence segments, a maximum gradient slew rate is determined for which a permitted maximum value of the stimulation potential is not exceeded. One of the representative pulse sequence segments is determined and selected, for a measurement protocol to be planned for a magnetic resonance imaging to be performed, according to the gradient amplitude of the gradient pulse having the highest stimulation potential of a pulse sequence segment of the pulse sequence on which the measurement protocol is based. The pulse sequence segment of the pulse sequence on which the measurement protocol is based is adjusted in such a way that a maximum gradient slew rate associated with the selected representative pulse sequence segment is also not exceeded by the pulse sequence segment of the pulse sequence on which the measurement protocol is based.

公开(公告)号：US20250005715A1

公开(公告)日：2025-01-02

申请号：US18345103

申请日：2023-06-30

Applicant: The Regents of the University of California ,  Siemens Healthineers AG

Inventor： Catalina Raymond ,  Benjamin Ellingson ,  Jingwen Yao ,  Thorsten Feiweier ,  Bryan Clifford ,  Xiaodong Zhong

IPC: G06T5/50

Abstract: A method for correcting echo planar imaging artifacts includes correcting at least one echo planar imaging artifact in an image to obtain a correct image. A trained neural network is used to correct the at least one echo planar imaging artifact. The image is obtained through echo planar imaging.

公开(公告)号：US20250004081A1

公开(公告)日：2025-01-02

申请号：US18759265

申请日：2024-06-28

Applicant: Siemens Healthineers AG ,  The General Hospital Corporation

Inventor： Daniel Polak ,  Daniel Nicolas Splitthoff ,  Stephen Farman Cauley ,  Thorsten Feiweier ,  Lawrence L. Wald

IPC: G01R33/48 ,  G01R33/54 ,  G01R33/56 ,  G01R33/561

Abstract: A method for acquiring a magnetic resonance image dataset of a field-of-view using an imaging protocol includes acquiring a low-resolution scout image dataset of the field-of-view, and sets of one or more additional k-space lines within a central region of k-space at regular intervals during the imaging protocol. A contrast of the low-resolution scout image dataset and a contrast of the sets of one or more additional k-space lines are matched and are independent of a contrast of the magnetic resonance image dataset. The low-resolution scout image dataset and the sets of one or more additional k-space lines are acquired after an at least approximately matched magnetization preparation and matched recovery times.

公开(公告)号：US20240385272A1

公开(公告)日：2024-11-21

申请号：US18664678

申请日：2024-05-15

Applicant: Siemens Healthineers AG

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

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

Abstract: Techniques are described for complex preprocessing steps to ensure consistency of sorted sets of reference measurement data, which have conventionally been required when sorting reference measurement data sets for DPG algorithms captured using an EPI technique, to be omitted because items of reference measurement data captured via the described techniques are already consistent in themselves. Therefore, for each polarity of the read-out gradients, a set of fully sampled reference measurement data is available, which is already suitable for carrying out a dual-polarity (DP) algorithm without any further measures.

公开(公告)号：US12222412B2

公开(公告)日：2025-02-11

申请号：US18592973

申请日：2024-03-01

Applicant: Siemens Healthineers AG

Inventor： Thorsten Feiweier ,  Max Müller ,  Adam Kettinger ,  Mario Zeller ,  Gudrun Ruyters

IPC: G01V3/00 ,  G01R33/54 ,  G01R33/56 ,  G01R33/563

Abstract: A method for preparing magnetic resonance imaging of an object under examination is described. A plurality of representative pulse sequence segments are generated, each of which is associated with a reference gradient amplitude of the gradient pulse having the highest stimulation potential of the representative pulse sequence segment, and the stimulation potential of which is representative of a group of partially different pulse sequences. For each of the representative pulse sequence segments, a maximum gradient slew rate is determined for which a permitted maximum value of the stimulation potential is not exceeded. One of the representative pulse sequence segments is determined and selected, for a measurement protocol to be planned for a magnetic resonance imaging to be performed, according to the gradient amplitude of the gradient pulse having the highest stimulation potential of a pulse sequence segment of the pulse sequence on which the measurement protocol is based. The pulse sequence segment of the pulse sequence on which the measurement protocol is based is adjusted in such a way that a maximum gradient slew rate associated with the selected representative pulse sequence segment is also not exceeded by the pulse sequence segment of the pulse sequence on which the measurement protocol is based.