Patents by Inventor Do-Sik Hwang

Do-Sik Hwang 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).

  • Patent number: 10168405
    Abstract: Provided are a method and apparatus for processing a magnetic resonance (MR) image of an object including first and second materials on a magnetic resonance imaging (MRI) apparatus by using multi-parameter mapping including applying to the object a plurality of radio frequency (RF) pulses separated by a first repetition time and a second repetition time, the first repetition time and the second repetition time being determined based on the first material and the second material; undersampling first MR signals corresponding to the first material and second MR signals corresponding to the second material in a K-space; and performing matching between the undersampled first and the undersampled second MR signals and a signal model for the multi-parameter mapping to determine attribute values corresponding to the first and the second materials at at least one point in an MR image of the object.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: January 1, 2019
    Assignees: SAMSUNG ELECTRONICS CO., LTD., INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
    Inventors: Lae-hoon Kang, Dong-hyun Kim, Min-oh Kim, Dong-yeob Han, Do-sik Hwang, Yong-sup Park, Jong-buhm Park, Jae-sung Lee
  • Patent number: 9977109
    Abstract: Provided is a magnetic resonance imaging (MRI) apparatus.
    Type: Grant
    Filed: November 11, 2014
    Date of Patent: May 22, 2018
    Assignees: SAMSUNG ELECTRONICS CO., LTD., INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
    Inventors: Young-woon Lee, Jin-seong Jang, Do-sik Hwang, Tae-joon Eo, Hae-kyung Jung, Dong-hyun Kim, Min-oh Kim, Na-rae Choi, Dong-yeob Han
  • Patent number: 9927508
    Abstract: Provided is a magnetic resonance imaging (MRI) apparatus. The MRI apparatus includes: a data acquisition unit configured to acquire a first k-space including a first missing line by undersampling an MR signal received from an object at a first time point, acquire a second k-space including a first acquired line corresponding to the first missing line by undersampling an MR signal received from the object at a second time point, and acquire a third k-space including a second acquired line corresponding to the first missing line by undersampling an MR signal received from the object at a third time point; and an image processor configured to interpolate data in the first missing line based on data in the first and second acquired lines.
    Type: Grant
    Filed: November 11, 2014
    Date of Patent: March 27, 2018
    Assignees: SAMSUNG ELECTRONICS CO., LTD., INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
    Inventors: Young-yoon Lee, Do-sik Hwang, Tae-joon Eo, Jin-seong Jang, Hae-kyung Jung, Dong-hyun Kim, Min-oh Kim, Na-rae Choi, Dong-yeob Han
  • Publication number: 20160131729
    Abstract: Provided are a method and apparatus for processing a magnetic resonance (MR) image of an object including first and second materials on a magnetic resonance imaging (MRI) apparatus by using multi-parameter mapping including applying to the object a plurality of radio frequency (RF) pulses separated by a first repetition time and a second repetition time, the first repetition time and the second repetition time being determined based on the first material and the second material; undersampling first MR signals corresponding to the first material and second MR signals corresponding to the second material in a K-space; and performing matching between the undersampled first and the undersampled second MR signals and a signal model for the multi-parameter mapping to determine attribute values corresponding to the first and the second materials at at least one point in an MR image of the object.
    Type: Application
    Filed: November 11, 2015
    Publication date: May 12, 2016
    Applicants: SAMSUNG ELECTRONICS CO., LTD., INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
    Inventors: Lae-hoon KANG, Dong-hyun KIM, Min-oh KIM, Dong-yeob HAN, Do-sik HWANG, Yong-sup PARK, Jong-buhm PARK, Jae-sung LEE
  • Patent number: 9241671
    Abstract: Disclosed are an apparatus and a method for removing noise from biosignals. An embodiment of the invention provides an apparatus for removing noise from biosignals measured for a particular period of time that includes: a similarity calculating unit configured to calculate a similarity between any one biosignal from among the biosignals and other biosignals; and a noise removal unit configured to remove noise from the any one biosignal by using the similarity. Aspects of the invention provide the advantage of effectively removing noise from biosignals without distorting the waveforms of the biosignals.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: January 26, 2016
    Assignee: INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
    Inventors: Do-Sik Hwang, Ung Jang, Ji-han Kim
  • Patent number: 9119546
    Abstract: A method of controlling of an R-peak detection apparatus, which detects an R-peak from an ElectroCardioGram (ECG) signal, includes receiving the ECG signal, reading out a pre-stored ECG template, comparing the EG signal with the pre-stored ECG template to determine a similarity between the ECG signal and the pre-stored ECG template and determining whether the similarity is equal to or greater than a threshold value, and determining a corresponding interval as the R-peak when the similarity is equal to or greater than the threshold value.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: September 1, 2015
    Assignee: Industry-Academic Cooperation Foundation Yonsei University
    Inventors: Sang-Hun Lee, Ji-Han Kim, Do-Sik Hwang, Ung Jang
  • Publication number: 20150212176
    Abstract: Provided is a magnetic resonance imaging (MRI) apparatus. The MRI apparatus includes: a data acquisition unit configured to acquire a first k-space including a first missing line by undersampling an MR signal received from an object at a first time point, acquire a second k-space including a first acquired line corresponding to the first missing line by undersampling an MR signal received from the object at a second time point, and acquire a third k-space including a second acquired line corresponding to the first missing line by undersampling an MR signal received from the object at a third time point; and an image processor configured to interpolate data in the first missing line based on data in the first and second acquired lines.
    Type: Application
    Filed: November 11, 2014
    Publication date: July 30, 2015
    Applicants: SAMSUNG ELECTRONICS CO., LTD., INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
    Inventors: Young-yoon LEE, Do-sik HWANG, Tae-joon EO, Jin-seong JANG, Hae-kyung JUNG, Dong-hyun KIM, Min-oh KIM, Na-rae CHOI, Dong-yeob HAN
  • Publication number: 20150130461
    Abstract: Provided is a magnetic resonance imaging (MRI) apparatus.
    Type: Application
    Filed: November 11, 2014
    Publication date: May 14, 2015
    Applicants: SAMSUNG ELECTRONICS CO., LTD., INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
    Inventors: Young-woon LEE, Jin-seong JANG, Do-sik HWANG, Tae-joon EO, Hae-kyung JUNG, Dong-hyun KIM, Min-oh KIM, Na-rae CHOI, Dong-yeob HAN
  • Publication number: 20130245479
    Abstract: Disclosed are an apparatus and a method for removing noise from biosignals. An embodiment of the invention provides an apparatus for removing noise from biosignals measured for a particular period of time that includes: a similarity calculating unit configured to calculate a similarity between any one biosignal from among the biosignals and other biosignals; and a noise removal unit configured to remove noise from the any one biosignal by using the similarity. Aspects of the invention provide the advantage of effectively removing noise from biosignals without distorting the waveforms of the biosignals.
    Type: Application
    Filed: February 26, 2013
    Publication date: September 19, 2013
    Applicant: Industry-Academic Cooperation Foundation Yonsei University
    Inventors: Do-Sik Hwang, Ung Jang, Ji-han Kim
  • Publication number: 20110306869
    Abstract: An apparatus and method for producing tomographic image is disclosed. The disclosed apparatus for producing tomographic image comprises: an ultrasonic imaging unit configured to obtain multiple ultrasonic images of a subject; a tomographic imaging unit configured to obtain one or more tomographic image data of the subject; and a tomographic image correction unit configured to produce corrected tomographic image of a tomographic image which can be produced from the one or more tomographic image data by using the multiple ultrasonic images.
    Type: Application
    Filed: June 15, 2011
    Publication date: December 15, 2011
    Applicant: Industry-Academic Cooperation Foundation, Yonsei University
    Inventors: Do-Sik Hwang, Ji-Han Kim, Young-Jin Kim