Patents by Inventor De He Weng

De He Weng has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220236355
    Abstract: In a MR water-fat image separation method and device, within one echo period, a first echo set under a first readout gradient polarity and a second echo set under a second readout gradient polarity are acquired. The first and second readout gradient polarities may be opposite, and echoes in the first echo set may be positionally one-to-one symmetric to echoes in the second echo set with respect to the echo center of the echo period. A first echo image set is obtained based on first echo set data acquired in each echo period, and a second echo image set is obtained based on second echo set data acquired in each echo period. Using the first and second echo image sets, a Dixon water-fat separation calculation is performed to obtain a water image and a fat image. The method and device can advantageously increase acquisition efficiency and the signal-to-noise ratio.
    Type: Application
    Filed: January 27, 2022
    Publication date: July 28, 2022
    Applicant: Siemens Healthcare GmbH
    Inventors: Shi Cheng, Kun Zhou, De He Weng
  • Patent number: 11369317
    Abstract: In a method for correcting the interference in respiratory navigation, transmitting, during magnetic resonance scanning, a respiratory signal generated by a radio frequency signal generator to a human body; acquiring, as a measured respiratory signal, a respiratory signal passing through the human body and acquired in a local coil, wherein the measured respiratory signal is constituted by a real respiratory signal and an interference signal; determining, according to a respiratory signal coil sensitivity of the real respiratory signal and an interference signal coil sensitivity of the interference signal, a signal relation that is satisfied by the real respiratory signal, the interference signal and the measured respiratory signal; and calculating the signal relation to obtain the real respiratory signal.
    Type: Grant
    Filed: April 24, 2020
    Date of Patent: June 28, 2022
    Assignee: Siemens Healthcare GmbH
    Inventors: Nan Xiao, De He Weng, Yan Tu Huang, Qiong Zhang
  • Patent number: 11280864
    Abstract: The present application describes techniques for determining and eliminating a time delay between a radio frequency pulse and a layer selection gradient in a magnetic resonance device. The techniques for determining and eliminating the time delay direct include measuring the time delay between the layer selection gradient and the radio frequency pulse by using phase information. This technique is more sensitive and accurate than existing methods that use signal or artifact strength.
    Type: Grant
    Filed: April 23, 2020
    Date of Patent: March 22, 2022
    Assignee: Siemens Healthcare GmbH
    Inventor: De He Weng
  • Publication number: 20210378603
    Abstract: The disclosure relates to techniques for triggering magnetic resonance data acquisition. The techniques include detecting a respiration direction of a respiration signal of an acquisition subject, predicting in real time an amplitude peak value of an expiration signal in the current respiration period according to the real-time respiration signal of the acquisition subject, multiplying the amplitude peak value by a preset coefficient, and using the product as a trigger point threshold of the current respiration period. When it is determined that an expiration stage of the current respiration period is starting, the techniques also include calculating in real time or periodically the absolute value of the difference between the amplitude of the current expiration signal and the trigger point threshold currently calculated, and if the absolute value of the difference is less than a preset difference threshold, then triggering MR data acquisition.
    Type: Application
    Filed: June 3, 2021
    Publication date: December 9, 2021
    Applicant: Siemens Healthcare GmbH
    Inventors: Jin Qiang He, Fang Dong, De He Weng
  • Patent number: 10989782
    Abstract: A method and a magnetic resonance imaging device, and a corresponding computer readable storage medium. The method includes acquiring a distortion function describing a frequency dependence of an amplitude or phase of an MR-signal received by a receiver part of the MRI-device, Fourier transforming K-space data acquired using this receiver part to image space data, generating compensated image space data by compensating for the frequency dependence by dividing the image space data or image space data derived therefrom in image space by the distortion function, and providing the MR-image as the compensated image space data or reconstructed therefrom.
    Type: Grant
    Filed: December 19, 2019
    Date of Patent: April 27, 2021
    Assignee: Siemens Healthcare GmbH
    Inventors: David Grodzki, Stephan Biber, Kun Zhou, De He Weng
  • Patent number: 10969450
    Abstract: In a method, apparatus and storage medium for filling a k-space trajectory in magnetic resonance (MR) imaging, a blank window, following an RF excitation pulse, is set in an arbitrary spatial encoding direction, and a first MR signal is acquired in this blank window, to obtain the phase of the first MR signal. A gradient field is activated outside the blank window and a second MR signal is acquired to obtain the phase of the second MR signal. This first and second MR signals are entered into k-space along first k-space and second k-space trajectories that are respectively based on the phase of the first MR signal and the phase of the second MR signal. A calibrated k-space trajectory in the spatial encoding direction is determined based on the first and second k-space trajectories.
    Type: Grant
    Filed: April 24, 2019
    Date of Patent: April 6, 2021
    Assignee: Siemens Healthcare GmbH
    Inventors: Zhong Qiang Shi, De He Weng
  • Publication number: 20210052187
    Abstract: The present disclosure provides techniques for determining a respiration phase by extracting a distance characteristic value, a score characteristic value, and an area characteristic value from the respiration signal, wherein the distance characteristic value, the score characteristic value and the area characteristic value are used to indicate waveform variation between two adjacent waveforms in the respiration signal. The techniques include training a respiration signal model according to the distance characteristic value, the score characteristic value, and the area characteristic value to determine the respiration phase of the respiration signal using the respiration signal model.
    Type: Application
    Filed: August 20, 2020
    Publication date: February 25, 2021
    Applicant: Siemens Healthcare GmbH
    Inventors: Jin Qiang He, De He Weng, Shu Qun Xie, Fang Dong
  • Publication number: 20200337643
    Abstract: In a method for correcting the interference in respiratory navigation, transmitting, during magnetic resonance scanning, a respiratory signal generated by a radio frequency signal generator to a human body; acquiring, as a measured respiratory signal, a respiratory signal passing through the human body and acquired in a local coil, wherein the measured respiratory signal is constituted by a real respiratory signal and an interference signal; determining, according to a respiratory signal coil sensitivity of the real respiratory signal and an interference signal coil sensitivity of the interference signal, a signal relation that is satisfied by the real respiratory signal, the interference signal and the measured respiratory signal; and calculating the signal relation to obtain the real respiratory signal.
    Type: Application
    Filed: April 24, 2020
    Publication date: October 29, 2020
    Applicant: Siemens Healthcare GmbH
    Inventors: Nan Xiao, De He Weng, Yan Tu Huang, Qiong Zhang
  • Publication number: 20200341086
    Abstract: The present disclosure related to techniques for determining and eliminating a time delay between a radio frequency pulse and a layer selection gradient in a magnetic resonance device. The techniques for determining and eliminating the time delay direct measures the time delay between the layer selection gradient and the radio frequency pulse by using phase information. This technique is more sensitive and accurate than existing methods that use signal or artifact strength.
    Type: Application
    Filed: April 23, 2020
    Publication date: October 29, 2020
    Applicant: Siemens Healthcare GmbH
    Inventor: De He Weng
  • Publication number: 20200205693
    Abstract: In a magnetic resonance imaging method, a first adjustment parameter is determined for presetting an initial contrast of a magnetic resonance image; a second adjustment parameter is determined for obtaining an optimized contrast of the magnetic resonance image and a specified data acquisition time of a blade artifact correction sequence; an optimized echo signal evolution curve is determined according to the first adjustment parameter and the second adjustment parameter; an actual variable flip angle train is calculated according to the optimized echo signal evolution curve; and the actual variable flip angle train is applied to a two-dimensional fast spin echo sequence, and the blade artifact correction sequence corresponding to the second adjustment parameter is used to acquire magnetic resonance signals and enable the magnetic resonance image to satisfy the optimized contrast.
    Type: Application
    Filed: December 30, 2019
    Publication date: July 2, 2020
    Applicant: Siemens Healthcare GmbH
    Inventors: Yu Yu Wang, De He Weng, Kun Zhou, Le Zhang
  • Publication number: 20200200849
    Abstract: A method and a magnetic resonance imaging device, and a corresponding computer readable storage medium. The method includes acquiring a distortion function describing a frequency dependence of an amplitude or phase of an MR-signal received by a receiver part of the MRI-device, Fourier transforming K-space data acquired using this receiver part to image space data, generating compensated image space data by compensating for the frequency dependence by dividing the image space data or image space data derived therefrom in image space by the distortion function, and providing the MR-image as the compensated image space data or reconstructed therefrom.
    Type: Application
    Filed: December 19, 2019
    Publication date: June 25, 2020
    Applicant: Siemens Healthcare GmbH
    Inventors: David Grodzki, Stephan Biber, Kun Zhou, De He Weng
  • Publication number: 20190324103
    Abstract: In a method, apparatus and storage medium for filling a k-space trajectory in magnetic resonance (MR) imaging, a blank window, following an RF excitation pulse, is set in an arbitrary spatial encoding direction, and a first MR signal is acquired in this blank window, to obtain the phase of the first MR signal. A gradient field is activated outside the blank window and a second MR signal is acquired to obtain the phase of the second MR signal. This first and second MR signals are entered into k-space along first k-space and second k-space trajectories that are respectively based on the phase of the first MR signal and the phase of the second MR signal. A calibrated k-space trajectory in the spatial encoding direction is determined based on the first and second k-space trajectories.
    Type: Application
    Filed: April 24, 2019
    Publication date: October 24, 2019
    Applicant: Siemens Healthcare GmbH
    Inventors: Zhong Qiang Shi, De He Weng
  • Publication number: 20180360396
    Abstract: An imaging apparatus and a positioning apparatus that include an imaging unit for imaging a detected part of a body to be detected; and a distance positioning unit having at least two signal positioning devices, i.e., a signal generator and a signal detector, wherein one signal positioning device is arranged at the detected part, the other signal positioning device is arranged at a position where a predetermined position relationship exists relative to the imaging unit. The position of the detected part in at least one direction in a three-dimensional space relative to the imaging unit is obtained according to a measured distance between the two signal positioning devices. The imaging apparatus and the positioning apparatus reduce pre-positioning imaging sequence workload, and the risk of radiation on the body to be detected is avoided.
    Type: Application
    Filed: September 7, 2018
    Publication date: December 20, 2018
    Applicant: Siemens Healthcare GmbH
    Inventors: De He Weng, Xu Yan
  • Patent number: 10151818
    Abstract: In a magnetic resonance angiography method and apparatus, a time-of-flight sequence is used to acquire and enter k-space data, and a magnetic resonance angiography image is reconstructed from the k-space data. The time-of-flight sequence includes at least one saturation radio frequency pulse and multiple excitation radio frequency pulses. At least two of the excitation radio frequency pulses directly follow the saturation radio frequency pulse, and part of the k-space data is collected after each of the excitation pulses. Scanning time can thus be decreased, scanning efficiency can be improved, the electromagnetic absorption ratio can be reduced, and a venous magnetic resonance signal is still suppressed.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: December 11, 2018
    Assignee: Siemens Aktiengesellschaft
    Inventors: Jing An, De He Weng
  • Patent number: 9594146
    Abstract: In a trajectory correction method and apparatus for k-space data points in magnetic resonance imaging, a magnetic resonance data acquisition unit is operated to execute a sampling sequence to obtain k-space to be corrected. Empirical points are selected used to divide k-space to be corrected into a central region and a peripheral region. The trajectories of the data points in the central region and the peripheral region are corrected and the sampling sequence is executed again, with the corrected trajectories, to obtain corrected k-space.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: March 14, 2017
    Assignee: Siemens Aktiengesellschaft
    Inventors: De He Weng, Qiong Zhang
  • Patent number: 9390476
    Abstract: In a magnetic resonance imaging method and apparatus for water/fat separation, a turbo spin echo BLADE (TSE BLADE) artifact correction sequence is executed to acquire original data for an in-phase image and original data for an opposite-phase image, and an in-phase image on the basis of the original data for the in-phase image and an opposite-phase image on the basis of the original data for the in-phase image and the original data for the opposite-phase image are reconstructed. Water and fat images are calculated on the basis of the reconstructed in-phase image and opposite-phase image. By using a TSE BLADE sequence to acquire k-space data, the advantage of the BLADE sequence of being insensitive to rigid body motion and pulsation is inherently present, thereby reducing sensitivity to motion artifacts while improving the image signal-to-noise ratio.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: July 12, 2016
    Assignee: Siemens Aktiengesellschaft
    Inventor: De He Weng
  • Publication number: 20160073980
    Abstract: An imaging apparatus and a positioning apparatus that include an imaging unit for imaging a detected part of a body to be detected; and a distance positioning unit having at least two signal positioning devices, i.e., a signal generator and a signal detector, wherein one signal positioning device is arranged at the detected part, the other signal positioning device is arranged at a position where a predetermined position relationship exists relative to the imaging unit. The position of the detected part in at least one direction in a three-dimensional space relative to the imaging unit is obtained according to a measured distance between the two signal positioning devices. The imaging apparatus and the positioning apparatus reduce pre-positioning imaging sequence workload, and the risk of radiation on the body to be detected is avoided.
    Type: Application
    Filed: September 15, 2015
    Publication date: March 17, 2016
    Applicant: Siemens Healthcare GmbH
    Inventors: De He Weng, Xu Yan
  • Publication number: 20160033608
    Abstract: In a magnetic resonance angiography method and apparatus, a time-of-flight sequence is used to acquire and enter k-space data, and a magnetic resonance angiography image is reconstructed from the k-space data. The time-of-flight sequence includes at least one saturation radio frequency pulse and multiple excitation radio frequency pulses. At least two of the excitation radio frequency pulses directly follow the saturation radio frequency pulse, and part of the k-space data is collected after each of the excitation pulses. Scanning time can thus be decreased, scanning efficiency can be improved, the electromagnetic absorption ratio can be reduced, and a venous magnetic resonance signal is still suppressed.
    Type: Application
    Filed: July 31, 2015
    Publication date: February 4, 2016
    Applicant: Siemens Aktiengesellschaft
    Inventors: Jing An, De He Weng
  • Patent number: 8907673
    Abstract: For magnetic resonance imaging (MRI), a dynamic frequency drift correction method for binomial water excitation method includes collecting the reference one-dimensional navigation signal by an MRI device; acquiring one current one-dimensional navigation signal after scanning N images, wherein N is a positive integer; calculating the frequency drift according to the reference one-dimensional navigation signal and the current one-dimensional navigation signal; calculating and setting the initial phase of the next radio frequency signal by the MRI device according to the frequency drift.
    Type: Grant
    Filed: April 29, 2011
    Date of Patent: December 9, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventors: Qiang He, De He Weng, Xiao Dong Zhou
  • Patent number: 8890526
    Abstract: In a method and an apparatus for making a distinction in a magnetic resonance imaging water-fat image, three echoes are acquired without phase encoding as a reference scan, a reference water-fat image projection is calculated in the phase encoding direction using the reference scan, a complete water-fat image projection is calculated in the phase encoding direction according to a water image and a fat image obtained by a three-point Dixon method, a correlation between the reference water-fat image projection and the complete water-fat image projection is calculated to obtain at least two correlated values, and the maximum correlated value is acquired therefrom, so as to determine the type of said image calculated by using the three-point Dixon method.
    Type: Grant
    Filed: December 29, 2011
    Date of Patent: November 18, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventor: De He Weng