Sangtae
Sangtae Ahn, Guilderland, NY US
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20150065854 | JOINT ESTIMATION OF ATTENUATION AND ACTIVITY INFORMATION USING EMISSION DATA - Methods, systems and non-transitory computer readable media for imaging are disclosed. Emission projection data corresponding to a target region of a subject is acquired using an emission tomography system. Additionally, one or more magnetic resonance images of the target region are generated using a magnetic resonance imaging system operatively coupled to the emission tomography system. A partially-determined attenuation map is determined by identifying one or more regions in the partially-determined attenuation map with a designated confidence level based on the magnetic resonance images. Further, a complete attenuation map and/or a complete activity map is reconstructed from the emission projection data using the partially-determined attenuation map as a constraint. One or more images corresponding to the target region are then generated based on the partially-determined attenuation map, the complete attenuation map and/or the complete activity map. | 03-05-2015 |
Sangtae Ahn, Niskayuna, NY US
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20140003689 | METHODS AND SYSTEMS FOR ENHANCED TOMOGRAPHIC IMAGING | 01-02-2014 |
20140126793 | SYSTEMS AND METHODS FOR PET PENALIZED-LIKLIHOOD IMAGE RECONSTRUCTION WITH SPATIALLY VARYING SMOOTHING PARAMETERS - A computer-implemented method for penalized-likelihood reconstruction of a Positron Emission Tomography (PET) image includes generating a regularization function in which a smoothing parameter is modulated by one or more data-independent spatially variable modulation factors to compensate for sensitivity variations in a PET voxel dataset, and reconstructing the PET image from the PET emission dataset using the regularization function. | 05-08-2014 |
20140126794 | SYSTEMS AND METHODS FOR PARTIAL VOLUME CORRECTION IN PET PENALIZED-LIKELIHOOD IMAGE RECONSTRUCTION - A computer-implemented method for partial volume correction in Positron Emission Tomography (PET) image reconstruction includes receiving emission data related to an activity distribution, reconstructing the activity distribution from the emission data by maximizing a penalized-likelihood objective function to produce a reconstructed PET image, quantifying an activity concentration in a region of interest of the reconstructed PET image to produce an uncorrected quantitation, and correcting the uncorrected quantitation based on a pre-calculated contrast recovery coefficient value to account for a partial volume error in the uncorrected quantitation. | 05-08-2014 |
20150117733 | SYSTEM AND METHOD RECONSTRUCTING A NUCLEAR MEDICINE IMAGE USING DEFORMED ATTENUATION IMAGE - According to some embodiments, an emission tomography scanner may acquire emission scan data. One or more anatomical images may be generated using an anatomical imaging system, and the anatomical images may be processed to obtain an initial attenuation image. An emission image and a corrected attenuation image may be jointly reconstructed from the acquired emission scan data, the corrected attenuation image representing a deformation of the initial attenuation image. A final reconstructed emission image may then be calculated based on the reconstructed emission image and/or the corrected attenuation image. The final reconstructed emission image may then be stored in a data storage system and/or displayed on a display system. | 04-30-2015 |
Sangtae Ha, Superior, CO US
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20160049083 | SYSTEMS AND METHODS FOR AUTHORING AN INTEGRATED AND INDIVIDUALIZED COURSE OR TEXTBOOK - The present invention is directed towards methods and systems to assist an author in constructing an electronic course or textbook (referred to generally as a course). The system allows an author to integrate various types of content into his/her course, and to specify a set of rules that will determine if and how the content will be individualized to each end user; the resultant courses are thus termed Integrated and Individualized Courses (IIC). Through the system, an author is able to import content files into an authoring application, and then use this application to edit the files, arrange them into segments, and define the course structure as a sequence of these segments, all through drag and drop functionality. | 02-18-2016 |
20160063881 | SYSTEMS AND METHODS TO ASSIST AN INSTRUCTOR OF A COURSE - A system and method to assist an instructor in managing, understanding, and drawing conclusions about the learning behavior. The system includes methods for processing data collected about users as they interact with the various modalities of learning that may be integrated into the course, and rendering this information into visualizations that are displayed on an instructor dashboard and updated in real time. This instructor interface includes a plurality of modules targeted towards the management of and interaction with users, and the analysis and visualization of a different aspect of their learning | 03-03-2016 |
20160104261 | SYSTEMS AND METHODS FOR INTEGRATING AN E-LEARNING COURSE DELIVERY PLATFORM WITH AN ENTERPRISE SOCIAL NETWORK - The present invention is directed towards systems and methods for integrating electronic learning (eLearning) platforms with Enterprise Social Networks (ESNs) in corporate learning settings. | 04-14-2016 |
Sangtae Im, Bucheon-Si KR
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20140376185 | COOLING DEVICE - A cooling device according to an exemplary embodiment of the present invention includes: a chamber including at least one flexible surface; a piezoelectric element formed in the at least one flexible surface and generating a volume change in the chamber by bending the at least one flexible surface in a first direction or a second direction to generates a first directional air flow or a second directional air flow; an opening formed in the chamber and becoming a channel of the first direction air flow or the second directional air flow; and at least one connection unit connected to the outer side of the chamber and the outer side of a heat source that is provided at a distance from the chamber and connecting the chamber and the heat source. | 12-25-2014 |
Sangtae Kim, Seoul KR
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20100007743 | FRAME SYNCHRONIZATION AND STRUCTURE DETECTION METHOD IN DVB-S2 SYSTEM - Provided is a method for detecting frame sync and frame structure in a satellite broadcasting system. The method for detecting frame sync and frame structure includes the steps of: calculating differential correlation values of reception symbols; generating index sequences of reception symbols whose differential correlation values calculated above exceed a threshold value; calculating positions estimated as frame start points which correspond to a total frame number based on the number of symbols per frame for each frame structure; and detecting frame sync and frame structure based on the umber of positions where the above-calculated frame start point estimated positions and the above-generated index sequences are matched. | 01-14-2010 |
20110047199 | CORRELATION APPARATUS AND METHOD FOR ACQUIRING ROBUST SYNCHRONIZATION - Provided is a correlation apparatus and method for acquiring a robust synchronization. The correlation method may include: calculating a received symbol phase difference with respect to a received symbol; calculating a correlation SoF symbol phase difference with respect to a correlation SoF symbol for a correlation; calculating a differential correlation value of the received symbol using the received symbol phase difference and the correlation SoF symbol phase difference; calculating a Euclidean distance value of the received symbol using the received symbol phase difference; and calculating a sum correlation value of the received symbol using the differential correlation value and the Euclidean distance value. | 02-24-2011 |
Sangtae Kim, Hwaseong-Si KR
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20150287475 | NONVOLATILE MEMORY DEVICE AND MEMORY SYSTEM INCLUDING THE SAME - A nonvolatile memory device is provided. The nonvolatile memory device includes a memory cell array, an anti-fuse cell array, a sense amplifier, a page buffer, and a control logic. The memory cell array includes memory cells connected to word lines and bit lines. The anti-fuse cell array stores setting information for controlling the memory cell array. The anti-fuse cell array includes anti-fuse cells connected to the bit lines. The sense amplifier is connected to the bit lines to sense the memory cells or the anti-fuse cells. The page buffer stores data that is read out from the memory cells or the anti-fuse cells. The control logic controls the sense amplifiers and the page buffer to read out data from the memory cell array or the anti-fuse cell array. | 10-08-2015 |
Sangtae Kim, Gyeonggi-Do KR
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20090154609 | APPARATUS AND METHOD FOR SELECTING CORRELATION SCHEME BASED ON CARRIER FREQUENCY ERROR - Provided is a correlation scheme selecting apparatus and method that can acquire initial synchronization efficiently by calculating frequency error criterion threshold between correlation schemes and selecting a correlation scheme for each region when a correlation value is calculated for initial sync in a communication system with carrier frequency errors. The method for selecting a correlation scheme based on a carrier frequency error includes: calculating mis-detection probability values based on a normalized frequency offset for each correlation scheme; determining as a frequency-error criterion threshold a crossing point of graphs of the calculated mis-detection probability values for each correlation scheme; and selecting a correlation scheme based on the determined frequency-error criterion threshold. | 06-18-2009 |