公开(公告)号：US12161455B2

公开(公告)日：2024-12-10

申请号：US16954258

申请日：2018-12-18

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Tim Nielsen ,  Jan Hendrik Wuelbern

IPC: A61B5/055 ,  G01R33/48 ,  G01R33/56 ,  G01R33/561 ,  G01R33/565 ,  G01R33/567

Abstract: The invention provides for a medical imaging system (100, 300, 500) comprising a processor (104). Machine executable instructions cause the processor to: receive (200) magnetic resonance data (120) comprising discrete data portions (612) that are rotated in k-space; bin (202) the discrete data portions into predetermined motion bins (122) using a motion signal value; reconstruct (204) a reference image (124) for each of the predetermined motion bins; construct (206) a motion transform (126) between the reference images; bin (208) a chosen group (610) of the discrete data portions into a chosen time bin (128). Generate an enhanced image (130) for the chosen time bin using the chosen group fo the discrete data portions and the motion transform of each of the chosen group to correct the discrete data portions.

公开(公告)号：US10976398B2

公开(公告)日：2021-04-13

申请号：US15501031

申请日：2015-08-11

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Tim Nielsen ,  Sascha Krueger

IPC: G01R33/567 ,  A61B5/113 ,  G01R33/565 ,  A61B5/00 ,  A61B5/055

Abstract: A magnetic resonance imaging system connectable to a respiration monitor configured to provide an output signal whose level represents a respiration state. A prospective acquisition scheme for acquiring magnetic resonance images at each of a set of selected respiration states is provided, the triggering on the selected respiration states being based on predetermined threshold output signal levels of the respiration monitoring means, Respiration states at which magnetic resonance images were actually acquired, are compared with the selected respiration states according to the prospective acquisition scheme and predetermined ranges of tolerance of the selected respiration states, The prospective acquisition scheme is modified, if one of the actual respiration states lies outside the predetermined range of tolerance of the selected respiration state, and magnetic resonance imaging acquisition is executed pursuant to the modified prospective acquisition scheme.

公开(公告)号：US10509090B2

公开(公告)日：2019-12-17

申请号：US15548213

申请日：2016-02-05

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Sascha Krueger ,  Tim Nielsen

IPC: G01R33/565 ,  G01R33/56 ,  G01R33/54 ,  A61B5/055 ,  G01R33/563 ,  G01R33/48 ,  A61N5/10

Abstract: The invention provides for a method of operating a magnetic resonance imaging system. The method comprises the steps of: acquiring (200) first magnetic resonance data (142) by controlling the magnetic resonance imaging system with pulse sequence instructions (140), reconstructing (202) one or more first image (144) from the first magnetic resonance data, and assigning (204) the one or more first image to a first memory group of a set of memory groups (300). The method further comprises repeatedly performing the following steps: acquiring (206) sequential magnetic resonance data (148) by controlling the magnetic resonance imaging system with the pulse sequence instructions, reconstructing (208) one or more sequential image (150) from the sequential magnetic resonance data, computing (210) a distance measure (152) between the one or more sequential image and each of the set of memory groups, assigning (214) the one or more sequential images to a chosen memory group if the distance measure between the chosen group and the one or more sequential images is within a predetermined range, creating (216) a subsequent memory group (304) in the memory if the one or more sequential images is not assigned to the chosen memory group, and assigning (218) the one or more sequential image to the subsequent memory group if the subsequent memory group is created.

公开(公告)号：US12228635B2

公开(公告)日：2025-02-18

申请号：US17045163

申请日：2019-03-29

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Daniel Wirtz ,  Tim Nielsen ,  Christoph Leussler

IPC: G01S13/86 ,  A61N5/10 ,  G01R33/28 ,  G01R33/48 ,  G01R33/567 ,  G01S13/88 ,  G01S17/894

Abstract: The invention provides for a medical instrument (100, 300, 400, 500) comprising a magnetic resonance imaging system (102). The medical instrument further comprises a subject support (120) with a support surface (121) configured for supporting at least a portion of the subject within an imaging zone (108). The subject support comprises a radar array (125) embedded below the support surface. The medical instrument further comprises a radar system (124) for acquiring a radar signal (144) from the subject. The medical instrument further comprises a motion detection system (122) configured for acquiring a movement signal (146). Execution of machine executable instructions (140) causes a processor (130) to: continuously (200) receive the radar signal; continuously (202) receive the movement signal; continuously (204) calculate a combined motion signal (148) from the radar system and the movement signal; and control (206) the magnetic resonance imaging system with the pulse sequence commands to acquire the magnetic resonance imaging data, wherein the acquisition of the magnetic resonance imaging data is controlled using the combined motion signal.

公开(公告)号：US20240404131A1

公开(公告)日：2024-12-05

申请号：US18699651

申请日：2022-10-04

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Karsten Sommer ,  Christian Wuelker ,  Christophe Michael Jean Schuelke ,  Tim Nielsen

IPC: G06T11/00 ,  A61B5/00 ,  A61B5/055 ,  G06T3/4046 ,  G06T5/50 ,  G06T5/60 ,  G06T7/00 ,  G06T7/11 ,  G06T7/246

Abstract: Described herein is a medical system (100, 300) comprising a memory (110) storing machine executable instructions (120) and an upsampling neural network (122). The upsampling neural network is configured to output an upsampled magnetic resonance image (130) with a second resolution in response to receiving a preliminary magnetic resonance image (126) with a first resolution which is lower than the second resolution. The execution of the machine executable instructions causes a computational system (104) to: receive (200) preliminary k-space data (124); reconstruct (202) the preliminary magnetic resonance image from the preliminary k-space data; receive (204) clinical k-space data (204); receive (206) the upsampled magnetic resonance image in response to inputting the preliminary magnetic resonance image into the upsampling neural network; and provide (208) a motion corrected magnetic resonance image (132) using the upsampled magnetic resonance image and the clinical k-space data.

公开(公告)号：US20230056449A1

公开(公告)日：2023-02-23

申请号：US17796685

申请日：2021-02-03

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Tim Nielsen ,  Jan Jakob Meineke

IPC: G01R33/56 ,  G01R33/561

Abstract: Disclosed herein is a medical system (100, 300). The execution of machine executable instructions (120) causes a processor (104) to: receive (200) measured gradient echo k-space data (122); receive (202) an off-resonance phase map (124); reconstruct (204) an initial image (126) from the measured gradient echo k-space data; calculate (206) an upsampled phase map (128) from the off-resonance phase map; calculate (208) an upsampled image (130) from the initial image; calculating (210) a modulated image (132) by modulating the upsampled image with the upsampled phase map; calculate (212) a corrected image (134) comprising iteratively. The iterative calculation comprises: calculating (214) updated k-space data by applying a data consistency algorithm (138) to a k-space representation of the modulated image and the measured gradient echo k-space data and calculating (216) an updated image (142) from the updated k-space data. Calculation of the updated image comprises demodulation by the upsampled phase map and applying a smoothing algorithm.

公开(公告)号：US10890638B2

公开(公告)日：2021-01-12

申请号：US16391457

申请日：2019-04-23

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Juergen Rahmer ,  Tim Nielsen ,  Peter Boernert

IPC: G01R33/385 ,  A61B5/055 ,  G01R33/44 ,  G01R33/48 ,  G01R33/483 ,  G01R33/561 ,  G01R33/58

Abstract: A medical instrument includes a magnetic resonance (MR) imaging system with an imaging zone and a gradient coil system with three orthogonal gradient coils.
A processor controls the medical instrument to: repeatedly control the MR imaging system with calibration pulse sequence commands to acquire the MR calibration data for multiples slices using at least one of the three orthogonal gradient coils to generate the slice select gradient magnetic field; compute a Fourier transform of the MR calibration data for each of the voxels of the multiple slices in the phase encoding directions; compute an expansion of the Fourier transformed MR calibration data into spherical harmonics; and calculate a three-dimensional gradient impulse response function for the at least one of the three orthogonal gradient coils using the expansion into spherical harmonics. The calibration pulse sequence commands are configured to acquire MR calibration data from a phantom according to a calibration protocol with two-dimensional phase encoding perpendicular to a slice select gradient magnetic field.

公开(公告)号：US10156623B2

公开(公告)日：2018-12-18

申请号：US14425669

申请日：2013-09-02

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Tim Nielsen ,  Peter Börnert

IPC: H03F1/26 ,  G01R33/565

Abstract: A magnetic resonance imaging system (200, 300) acquires magnetic resonance data (242, 244). A processor (230) controls the magnetic resonance imaging system to execute instructions (250, 252, 254, 256, 258) which cause the processor to repeatedly: control (100) the magnetic resonance imaging system to acquire magnetic resonance data including magnetic resonance navigator data (244); create (102) a set of navigator vectors by extracting the navigator data from each portion of the magnetic resonance data; construct (104) a dissimilarity matrix (246, 400, 700, 800, 900, 1000, 1100, 1400, 1500) by calculating a metric between each of the set of navigator vectors; generate (106) a matrix classification (248) of the dissimilarity matrix using a classification algorithm; and control (108) the magnetic resonance imaging system to modify acquisition of the magnetic resonance data using the matrix classification.

公开(公告)号：US20230394652A1

公开(公告)日：2023-12-07

申请号：US18031889

申请日：2021-10-11

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Nicola Pezzotti ,  Christian Wuelker ,  Tim Nielsen ,  Karsten Sommer ,  Michael Grass ,  Heinrich Schulz ,  Sergey Kastryulin

IPC: G06T7/00

CPC classification number: G06T7/0012 ,  G06T2207/20084 ,  G06T2207/20081

Abstract: Disclosed herein is a medical system (100, 300, 400) comprising a memory (110) storing a trainable machine learning module (122) trained using training data descriptive of a training data distribution (600) to output a reconstructed medical image (136) in response to receiving measured medical image data (128) as input. The medical system comprises a computational system (104). The execution of machine executable instructions (120) causes the computational system to: receive (200) the measured medical image data and determine (202) the out-of-distribution score and the in-distribution accuracy score consecutively in an order determined a sequence, detect (204) a rejection of the measured medical image data using the out-of-distribution score and/or the in-distribution accuracy score during execution of the sequence, provide (206) a warning signal (134) if the rejection of the measured medical image data is detected. The out-of-distribution score is determined by inputting the measured medical image data into the out-of-distribution estimation module. The in-distribution accuracy score is determined by inputting the measured medical image data into the in-distribution accuracy estimation module.

公开(公告)号：US11684801B2

公开(公告)日：2023-06-27

申请号：US16492186

申请日：2018-03-19

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Nicole Schadewaldt ,  Tim Nielsen ,  Christian Buerger

IPC: A61N5/10

CPC classification number: A61N5/1037 ,  A61N5/1038 ,  A61N5/1049 ,  A61N2005/1055

Abstract: For delivering an image-guided radiation therapy treatment to a moving structure included in a region of a patient body a series of first images of the region of the patient body in different phases of a motion of the structure is acquired in accordance with a first imaging mode. The series of first images is associated with a series of second images of the patient body in essentially the same phases of the motion of the target structure, the second images being acquired in a second imaging mode. During the treatment, a third image is acquired using the second imaging mode during the radiation therapy treatment and a continuation of the radiation therapy treatment is planned on the basis of data relating to one of the first images selected on the basis of a comparison between the third image and the second images associated with the first images.