Patents by Inventor Woo Hyun Nam

Woo Hyun Nam 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: 8111892
    Abstract: Embodiments for registering a CT image onto ultrasound images are disclosed. At a preoperative stage, a plurality of first ultrasound images are formed during a respiratory cycle and a CT image is obtained at the maximum inspiration. The CT image is registered onto each of the ultrasound images to thereby form ultrasound-CT registered images. The ultrasound-CT registered images may be stored in the storage unit. Subsequently, at an intraoperative stage, a plurality of second ultrasound images may be sequentially formed in real time. Similarities may be measured between the first ultrasound images and the second ultrasound images, and the ultrasound-CT registered images, each corresponding to each of the first ultrasound images having highest similarity to the second ultrasound image may be retrieved. The retrieved ultrasound image and the second ultrasound image may be displayed at the same time.
    Type: Grant
    Filed: June 1, 2009
    Date of Patent: February 7, 2012
    Assignees: Medison Co., Ltd., Korea Advanced Institute of Science and Technology
    Inventors: Dong Gyu Hyun, Jong Beom Ra, Duhgoon Lee, Woo Hyun Nam, Dong-Goo Kang
  • Publication number: 20110268334
    Abstract: Provided are an apparatus and method for improving image resolution in a positron emission tomography (PET), which may reconstruct a high-resolution image in a PET system using a motion of an entire detector or a bed motion and may maintain a characteristic of a sinograms using a positive number in a sinogram computing, by applying a super-resolution algorithm that may be based on a maximum likelihood expectation maximization (MLEM) algorithm.
    Type: Application
    Filed: April 29, 2011
    Publication date: November 3, 2011
    Applicant: Korean Advanced Institute of Science and Technology
    Inventors: Jong Beom Ra, Kye Young Jeong, Woo Hyun Nam, Ji Hye Kim
  • Publication number: 20110028844
    Abstract: Embodiments for providing a 2-dimensional (D) computerized-tomography (CT) image corresponding to a 2-D ultrasound image through image registration between 3-D ultrasound and CT images are disclosed. An imaging system comprises a CT imaging unit, an ultrasound image forming unit, a storing unit, a processor and a display unit. The processor extracts the 2-D CT image from the 3-D ultrasound-CT registered image by performing a rigid-body transform upon the 3-D ultrasound image and calculating similarities between reference images and the 2-D ultrasound images, wherein the reference images are obtained through the rigid-body transform.
    Type: Application
    Filed: July 30, 2010
    Publication date: February 3, 2011
    Inventors: Dong Gyu Hyun, Jong Beom Ra, Duhgoon Lee, Woo Hyun Nam
  • Publication number: 20110026796
    Abstract: There is disclosed an embodiment for performing a calibration of a sensor by using an image registration between a three-dimensional ultrasound image and computerized tomography (CT) image. An ultrasound image forming unit includes an ultrasound probe and forms a three-dimensional ultrasound image of a target object. A sensor is coupled to the ultrasound probe. A memory stores a three-dimensional computed tomography (CT) image of the target object and position information on a position between the three-dimensional ultrasound image and the sensor. A processor performs image registration between the three-dimensional CT image and the three-dimensional ultrasound image to form a first transformation function for transforming a position of the sensor to a corresponding position on the three-dimensional CT image and performs calibration of the sensor by applying the position information to the first transformation function.
    Type: Application
    Filed: July 29, 2010
    Publication date: February 3, 2011
    Inventors: Dong Gyu Hyun, Jong Beom Ra, Duhgoon Lee, Woo Hyun Nam
  • Publication number: 20110028843
    Abstract: There is disclosed a system and method for providing a 2-dimensional CT image corresponding to a 2-dimensional ultrasound image by performing an image registration between a 3-dimensional ultrasound image and a 3-dimensional CT image.
    Type: Application
    Filed: July 29, 2010
    Publication date: February 3, 2011
    Inventors: Dong Gyu Hyun, Jong Beom Ra, Duhgoon Lee, Woo Hyun Nam
  • Patent number: 7867437
    Abstract: The present invention provides a method of manufacturing Ni-doped TiO2 nanotube-shaped powder and a method of manufacturing a sheet film to be inserted into a high-pressure hydrogen tank for a fuel cell vehicle by mixing the Ni-doped TiO2 nanotube-shaped powder with a binder and compressing the mixture. The method of manufacturing Ni-doped TiO2 nanotube-shaped powder includes: forming Ni-doped TiO2 nanotube-shaped powder using Ni-doped TiO2 powder as a starting material; and drying the Ni-doped TiO2 nanotube-shaped powder in the temperature range of 60 to 200° C. for 2 to 24 hours.
    Type: Grant
    Filed: December 31, 2007
    Date of Patent: January 11, 2011
    Assignees: Hyundai Motor Company, IACG Sejong University
    Inventors: Woo Hyun Nam, Kyung Sub Lee, Dong Hyun Kim, Sun Jae Kim, Nam Hee Lee, Hyo Jin Oh
  • Publication number: 20090304252
    Abstract: There are disclosed embodiments for non-rigid image registration between 3-dimensional ultrasound and CT images by using intensity and gradient information of vessels and diaphragm. An ultrasound image forming unit transmits/receives ultrasound signals to/from a target object to thereby output electrical receive signals, and forms 3-dimensional ultrasound images based on the electrical receive signals. A CT image forming unit forms 3-dimensional CT images of the target object. A registration unit determines first and second objective functions associated with diaphragm and vessel regions of the target object, respectively, based on intensity and gradient information upon portions corresponding to the diaphragm and vessel regions in each of the 3-dimensional ultrasound and CT images. The registration unit performs non-rigid image registration between the 3-dimensional ultrasound images and the 3-dimensional CT images based on the first and second objective functions.
    Type: Application
    Filed: June 2, 2009
    Publication date: December 10, 2009
    Inventors: Dong Gyu Hyun, Jong Beom Ra, Duhgoon Lee, Woo Hyun Nam
  • Publication number: 20090303252
    Abstract: Embodiments for registering a CT image onto ultrasound images are disclosed. At a preoperative stage, a plurality of first ultrasound images are formed during a respiratory cycle and a CT image is obtained at the maximum inspiration. The CT image is registered onto each of the ultrasound images to thereby form ultrasound-CT registered images. The ultrasound-CT registered images may be stored in the storage unit. Subsequently, at an intraoperative stage, a plurality of second ultrasound images may be sequentially formed in real time. Similarities may be measured between the first ultrasound images and the second ultrasound images, and the ultrasound-CT registered images, each corresponding to each of the first ultrasound images having highest similarity to the second ultrasound image may be retrieved. The retrieved ultrasound image and the second ultrasound image may be displayed at the same time.
    Type: Application
    Filed: June 1, 2009
    Publication date: December 10, 2009
    Inventors: Dong Gyu Hyun, Jong Beom Ra, Duhgoon Lee, Woo Hyun Nam, Dong-Goo Kang
  • Publication number: 20090306507
    Abstract: There is disclosed an embodiment for extracting anatomical features from a 3-dimensional B-mode ultrasound liver image for image registration. A system extracts anatomical features from a 3-dimensional B-mode ultrasound liver image for image registration. An image forming unit forms a 3-dimensional ultrasound liver image based on ultrasound signals reflected from the liver. A diaphragm extracting unit extracts a diaphragm region from the 3-dimensional B-mode ultrasound liver image. A vessel extracting unit extracts vessel regions from the 3-dimensional ultrasound liver image. A diaphragm refining unit refines the extracted diaphragm region with the extracted vessel regions to remove clutters from the diaphragm region. A registration unit extracts sample points from the diaphragm region with the clutters removed and the vessel regions for image registration.
    Type: Application
    Filed: June 2, 2009
    Publication date: December 10, 2009
    Inventors: Dong Gyu Hyun, Jong Beom Ra, Woo Hyun Nam, Dong-Goo Kang, Duhgoon Lee
  • Publication number: 20090098005
    Abstract: The present invention provides a method of manufacturing Ni-doped TiO2 nanotube-shaped powder and a method of manufacturing a sheet film to be inserted into a high-pressure hydrogen tank for a fuel cell vehicle by mixing the Ni-doped TiO2 nanotube-shaped powder with a binder and compressing the mixture. The method of manufacturing Ni-doped TiO2 nanotube-shaped powder includes: forming Ni-doped TiO2 nanotube-shaped powder using Ni-doped TiO2 powder as a starting material; and drying the Ni-doped TiO2 nanotube-shaped powder in the temperature range of 60 to 200° C. for 2 to 24 hours.
    Type: Application
    Filed: December 31, 2007
    Publication date: April 16, 2009
    Applicants: Hyundai Motor Company, IACG Sejong University
    Inventors: Woo Hyun Nam, Kyung Sub Lee, Dong Hyun Kim, Sun Jae Kim, Nam Hee Lee, Hyo Jin Oh