Abstract: Disclosed is a magnetic resonance imaging (MRI) apparatus with a spirally extended monopole antenna structure whereby magnetic field homogeneity is improved. The apparatus includes: a cylinder body 110; a plurality of monopole antennas forming an array, the antenna being spirally arranged along a surface of the cylinder body 110 at a predetermined inclination angle relative to a central axis of the cylinder body 110; a ground plate 130 in which ends of the monopole antennas are arranged on one surface of the ground plate 130 in a circular arrangement; and a plurality of coaxial cables 140 in which signal lines thereof are respectively connected to the monopole antennas and ground lines thereof are connected to the ground plate 130.

Abstract: Disclosed is a magnetic resonance imaging (MRI) apparatus with a spirally extended monopole antenna structure whereby magnetic field homogeneity is improved. The apparatus includes: a cylinder body 110; a plurality of monopole antennas forming an array, the antenna being spirally arranged along a surface of the cylinder body 110 at a predetermined inclination angle relative to a central axis of the cylinder body 110; a ground plate 130 in which ends of the monopole antennas are arranged on one surface of the ground plate 130 in a circular arrangement; and a plurality of coaxial cables 140 in which signal lines thereof are respectively connected to the monopole antennas and ground lines thereof are connected to the ground plate 130.

Abstract: A method for acquiring a PET image with ultra high resolution using movement of a PET device is provided. In the related art, there is a limit in lowering of the resolution below a half (d/2) of the width of a detector. According to the provided method, an image with ultra high resolution, which can jump over the limit, can be acquired. Further, since utilization of larger detectors becomes possible without a loss of the resolution, the sensitivity of the PET can be improved, and thus an image of higher quality can be acquired.

Abstract: The present invention relates to a method for tracking the motion of a subject in real time and for correcting a medical image. The method includes the steps of: (a) a motion detection module outputting real-time motion information of a subject; (b) a motion calculation module receiving and analyzing the real-time motion information, transforming the analyzed result into triaxial motion parameters, and outputting the triaxial motion parameters; (c) a driving module driving a driving motor in response to the triaxial motion parameters; and (d) a medical image data acquisition module moving by as much as the subject moves in response to the driving of the driving motor. According to the present invention, medical image data can be acquired as if a subject has not moved during imaging by calculating the triaxial motion parameters of a subject through motion information acquired from the motion detection module and moving the medical image data acquisition module according to the triaxial motion parameters.

Abstract: A method for acquiring a PET image with ultra high resolution using movement of a PET device is provided. In the related art, there is a limit in lowering of the resolution below a half (d/2) of the width of a detector. According to the provided method, an image with ultra high resolution, which can jump over the limit, can be acquired. Further, since utilization of larger detectors becomes possible without a loss of the resolution, the sensitivity of the PET can be improved, and thus an image of higher quality can be acquired.

Abstract: A method and apparatus are provided for reconstructing 3D image. The method may include the steps of: detecting a plurality of line of responses (LORs) emitted from an object; transforming the plurality of LORs into first sinogram data; back-projecting the first sinogram data with a plurality of projection angles to produce image data for the object; and projecting the produced image data with the plurality of projection angles to transform the image data into second sinogram data. The back-projecting may include filling pixels of image plane for each of the plurality of projection angles with the first sinogram data and rotating a coordinate axis of the image plane with corresponding projection angle to produce the image data. The projecting may include rotating the image data with corresponding projection angle in an opposite direction before projecting the image data with the plurality of projection angles. The projecting and the back-projecting may use symmetry properties in coordinate space.

Abstract: A method and apparatus are provided for reconstructing 3D image. The method may include the steps of: detecting a plurality of line of response (LORs) emitted from an object; transforming the plurality of LORs into first sinogram data; back-projecting the first sinogram data with a plurality of projection angles to produce image data for the object; and projecting the produced image data with the plurality of projection angles to transform the image data into second sinogram data. The back-projecting may include filling pixels of image plane for each of the plurality of projection angles with the first sinogram data and rotating a coordinate axis of the image plane with corresponding projection angle to produce the image data. The projecting may include rotating the image data with corresponding projection angle in an opposite direction before projecting the image data with the plurality of projection angles. The projecting and the back-projecting may use symmetry properties in coordinate space.