D.W. Kim
Pusan National University
Fourier transformImaging phantomFilter (signal processing)ProdrugQuantum noisePharmacokineticsSignalOpticsPhysicsPosition (vector)Absorption (skin)Vascular endothelial growth factor ANoiseMolecular biologyHypoxia-inducible factorsPixelScintillatorNoise reductionVoltageSpectral densityKermaChemistryMaterials scienceAminosalicylic acidLarge intestineVascular endothelial growth factorOral administrationCystineSmall intestineFlavonoidCysteineProcollagen-proline dioxygenaseNitro compoundSensitivity (electronics)HydroxylationQuercetinNitroreductaseDual-Energy Computed TomographyLinear analysisTube formationPlasma concentrationColon specificSubstrate (electronics)ChromatographyNoise (electronics)BiochemistryFunction (mathematics)PhotodiodeDetective quantum efficiencyFlat panel detectorDetectorPharmacology
12Publications
4H-index
82Citations
Publications 12
Newest
#2Yun Jung ParkH-Index: 13
Last. J. ShinH-Index: 2
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#1Sugyeong Ha (PNU: Pusan National University)H-Index: 6
#1Sung-Hun Ha (PNU: Pusan National University)H-Index: 9
Last. Hyunyun Kim (PNU: Pusan National University)H-Index: 4
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The sandwich-like multilayer detector can have a unique characteristic when it employs two detector layers having different spatial-resolution properties to each other. Reconstruction of dual-energy (DE) images using a weighted log-subtraction technique then results in the unsharp masking-like effect on the resultant images. We have developed a simple model describing the signal and noise in the sandwich detector-based DE computed tomography (CT) using a linear-systems theory. Applying the sandw...
1 CitationsSource
#1D.W. KimH-Index: 4
#2Jusung Park (PNU: Pusan National University)H-Index: 7
Last. Hyunyun KimH-Index: 4
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The single-shot dual-energy (DE) method using a sandwich-like multilayer detector generally suffers from noise in the resultant DE images due to the poor quantum noise in images obtained from the rear detector layer and its amplification due to the subtraction operation in DE reconstruction. The use of interlayer metal filter can further increase noise in DE images by increasing the rear-detector quantum noise. We have adopted several noise-reduction algorithms to the single-shot DE reconstructi...
1 CitationsSource
#1Jung Nam Kim (PNU: Pusan National University)H-Index: 7
#2D.W. Kim (PNU: Pusan National University)H-Index: 4
Last. Ho Kyung Kim (PNU: Pusan National University)H-Index: 21
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We have developed a sandwich-like multilayer detector capable of imaging a large field of view for the purpose of dental computed tomography. Two detectors forming the sandwich detector are based on indirect-conversion flat-panel detector technology. This development employed a relatively thin Gd2O2S:Tb scintillator for the front-detector scintillator and a relatively thick CsI:Tl for the rear one. On the other hand, the same photodiode arrays based on complementary metal-oxide-semiconductor act...
1 CitationsSource
#1J. ShinH-Index: 2
#1Jung-Won ShinH-Index: 11
Last. D. KimH-Index: 1
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#1J. ShinH-Index: 2
#1Jung-Won ShinH-Index: 11
Last. D. KimH-Index: 1
view all 4 authors...
Source
#1Sun-Yi Lee (PNU: Pusan National University)H-Index: 6
#2D.W. Kim (PNU: Pusan National University)H-Index: 4
Last. Myung-Sung Kim (PNU: Pusan National University)H-Index: 6
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#1D.W. Kim (PNU: Pusan National University)H-Index: 4
#2Jungoh Han (PNU: Pusan National University)H-Index: 4
Last. Ho Kyung Kim (PNU: Pusan National University)H-Index: 21
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We have experimentally investigated the long-term stability of imaging properties of a flat-panel detector in conditions used for dental x-ray imaging. The detector consists of a CsI:Tl layer and CMOS photodiode pixel arrays. Aging simulations were carried out using an 80-kVp x-ray beam at an air-kerma rate of approximately 5 mGy s−1 at the entrance surface of the detector with a total air kerma of up to 0.6 kGy. Dark and flood-field images were periodically obtained during irradiation, and the ...
4 CitationsSource
#1Myung-Sung Kim (PNU: Pusan National University)H-Index: 6
#2H. Kim (PNU: Pusan National University)H-Index: 2
Last. D. Kim (PNU: Pusan National University)H-Index: 1
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1 CitationsSource
#1D.W. Kim (PNU: Pusan National University)H-Index: 4
#2Sungchae Hong (PNU: Pusan National University)H-Index: 11
Last. Young Mi Kim (PNU: Pusan National University)H-Index: 23
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Metronidazole (MTZ) is a drug of choice for protozoal infections such as luminal amoebiasis. We designed and synthesized N-nicotinoyl-2-{2-(2-methyl-5-nitroimidazol-1-yl)ethyloxy}-D,L-glycine (NMG) as a colon-specific prodrug of MTZ. The synthetic yield of NMG was about 34%. The apparent partition coefficient of MTZ was greatly reduced by the chemical modification. While (bio)chemically stable in the contents of the upper intestine, NMG was rapidly cleaved to liberate MTZ on incubation with the ...
10 CitationsSource