Joonsung
Joonsung Choi, Daejeon KR
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20130162251 | PARALLEL MAGNETIC RESONANCE IMAGING METHOD FOR RADIAL TRAJECTORY - A parallel imaging (PI) method has been frequently used as a method for shortening an image acquisition time in the MRI field. The PI technique is a method for acquiring data using multi-channel coils, that is, several coils, when acquiring the data in MRI. According to this technique, data, the amount of which is smaller than that when the data is obtained using only one coil, is acquired, and then an image is obtained using coil information. According to an embodiment, a new image reconstruction method is proposed which adopts an expectation maximization (EM) technique that is different from the existing GRAPPA or SENSE technique when an image is obtained using PI data acquired through the radial trajectory. | 06-27-2013 |
Joonsung Hwang, Daejeon KR
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20150182502 | COMPOSITION FOR PREVENTION OR TREATMENT OF CANCER COMPRISING N-METHYLENENAPHTHO[2,1-b]FURAN-2-CARBOHYDRAZIDE DERIVATIVES AS AN ACTIVE INGREDIENT - The present invention relates to ethyl(2-methyl-3{(E)-[(naphtho[2,1-b]furan-2-ylcarbonyl)hydrazono]methyl}-1H-indole-1-yl)acetate, the novel mitosis inhibitor. The said ethyl(2-methyl-3{(E)-[(naphtho[2,1-b]furan-2-ylcarbonyl)hydrazono]methyl}-1H-indole-1-yl)acetate not only induces apoptosis by inhibiting tubulin polymerization in the course of mitosis but also displays an excellent anticancer effect in the multi-drug resistant cancer cells, so that it can be effectively used for the treatment of cell proliferative disease including various cancers. | 07-02-2015 |
Joonsung Kim, Gyeonggi-Do KR
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20120160556 | Circuit board and method of manufacturing the same - Provided is a circuit board including a base substrate on which an internal circuit structure is formed, an insulating material configured to cover the base substrate and having a via-hole configured to expose the internal circuit pattern, an external circuit structure formed on the insulating material and electrically connected to the internal circuit structure through the via-hole, and a solder resist pattern configured to cover the insulating material to expose the external circuit structure, wherein the insulating material has a structure in which an adhesion surface between the insulating material and the solder resist pattern is stepped with respect to an adhesion surface between the insulating material and the external circuit structure. | 06-28-2012 |
Joonsung Kim, Suwon-Si KR
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20120163752 | Method for manufacturing printed circuit board with optical waveguides - Disclosed herein is a method for manufacturing a printed circuit board with optical waveguides capable of reducing light loss by forming a bent portion having a changing pattern shape on a core layer and attaching a reflective member thereto to increase reflectivity. The method for manufacturing a printed circuit board with optical waveguides includes; (a) forming a lower clad layer on a base substrate; (b) applying a core material onto the lower clad layer; (c) performing exposure on the core material using a photo mask having a pattern; (d) performing development on the core material subjected to the exposure and forming a bent portion having a changing pattern shape to form a core layer; (e) applying an upper clad layer onto the lower clad layer having the core layer formed thereon; (f) performing exposure and development on the upper clad layer to expose a reflective portion of the machined bent portion to the outside; and (g) attaching a reflective member to the reflective portion exposed to the outside. Therefore, the bent portion having the changing pattern shape is machined to have a curved shape or an oblique shape and the reflective member is attached thereto, thereby making it possible to minimize light loss. | 06-28-2012 |
Joonsung Lee, Seoul KR
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20130063143 | Local SAR Constrained Parallel Transmission RF Pulse in Magnetic Resonance Imaging - A method of designing a parallel transmission radio frequency (RF) pulse for a magnetic resonance imaging (MRI) system includes compressing a model for a subject to be scanned by the MRI system into a plurality of virtual observation points within the model based on comparisons of peak sensitivity to local specific absorption rate (SAR), and defining the parallel transmission RF pulse that minimizes a weighted average of local SAR values with an iterative procedure that optimizes a set of weighting factors for the plurality of virtual observation points to maximize the minimized weighted average. | 03-14-2013 |
20140184219 | APPARATUS AND METHOD FOR CONDUCTIVITY AND SUSCEPTIBILITY RECONSTRUCTION - An apparatus, a method, and a recorded medium for conductivity and susceptibility reconstruction are disclosed. The apparatus for conductivity and susceptibility reconstruction includes: a susceptibility reconstruction part configured to reconstruct a susceptibility from a change in phase according to an increase in time of a multi-echo gradient echo image; a zero echo phase estimation part configured to estimate a phase at zero echo time based on a linearity of the phase change; and a conductivity reconstruction part configured to reconstruct a conductivity from the estimated zero echo phase. According to an embodiment of the invention, a multi-echo gradient echo sequence is used to not only obtain in vivo susceptibility but also obtain conductivity simultaneously. Also, an embodiment of the invention can improve the accuracy of the susceptibility measurements. | 07-03-2014 |
Joonsung Lee, Gwang-Ju KR
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20120256626 | PARALLEL TRANSMISSION RF PULSE DESIGN WITH LOCAL SAR CONSTRAINTS - A method of designing a parallel transmission radio frequency (RF) pulse for a magnetic resonance imaging (MRI) system includes compressing a model for a subject to be scanned by the MRI system into a plurality of voxel clusters, each voxel cluster defining a virtual observation point with a peak sensitivity to local specific absorption rate (SAR) for the voxel cluster, and defining the parallel transmission RF pulse based on an approximation of a minimization criterion having a local SAR component based on the peak sensitivity of each virtual observation point, the approximation comprising a weighted sum of the local SAR values for each virtual observation point. | 10-11-2012 |
Joonsung Lee, Changwon-Si KR
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20150199585 | METHOD OF SAMPLING FEATURE POINTS, IMAGE MATCHING METHOD USING THE SAME, AND IMAGE MATCHING APPARATUS - A method of sampling feature points, an image matching method using the same, and an image matching processor are disclosed. The method of sampling feature points for image matching includes: dividing a first image into a plurality of regions corresponding to a number of feature points to be sampled; extracting a sampled feature point from each of the regions such that a distance between a sampled feature point of one region and a sampled feature point of another region satisfies a predetermined condition; and estimating a homography on the basis of the extracted sampled feature points and corresponding sampled feature points of a second image to be matched with the first image. | 07-16-2015 |
Joonsung Park, Seoul KR
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20130163294 | INVERTER APPARATUS HAVING POWER SUPPLY CIRCUIT - An inverter apparatus having a power supply circuit includes a converter circuit for rectifying AC power into DC power, a smoothening circuit for smoothening the rectified DC power, an inverter circuit for converting the smoothened DC into AC at a variable frequency through a plurality of switches to control a load, and a current detection circuit for detecting overcurrent from the smoothened DC supplied from the inverter circuit, wherein the inverter circuit applies bootstrap power for driving the switches to the current detection circuit to use the bootstrap power as power of the current detection circuit. When bootstrap power for driving switch gates is used, it is possible to use the bootstrap power as the power of the current detection circuit by adding the auxiliary circuit composed of a small number of passive elements. | 06-27-2013 |