J. Lee, S. Yoo, S. Oh, S. Park, C. H. Lim, J.-W. Park, J. Tanguay, and H. K. Kim†, "Analysis of the detective quantum efficiency of a dual-energy photon-counting X-ray detector," 155(01), NDT & E International, 103397, 2025. [DOI 10.1016/j.ndteint.2025.103397] (Submitted 27 June 2024; accepted for publication 22 March 2025; published 4 April 2025) 

J. Lee, S. Yoo, S. Oh, C. H. Lim, J.-W. Park, and H. K. Kim†, "Detective quantum efficiency of a dual-energy photon-counting X-ray detector with charge sharing compensation," 20(01), Jinst, C01040, 2025. [DOI 10.1088/1748-0221/20/01/C01040] (Submitted 3 September 2024; accepted for publication 2 January 2025; published 30 January 2025)

M-.K. Kang, K-.S. Hing, D. Yang, and H. K. Kim†, "Multi-scale neural networks classification of mild cognitive impairment using functional near-infrared spectroscopy," BBE., 45, 11-22, 2024. [DOI 10.1016/j.bbe.2024.12.001] (Submitted 19 March 2024; accepted for publication 12 December 2024; published 10 December 2024) 

S. Yoo, S. Park, S. Yun, and H. K. Kim†, "Impact of the fiber-optic faceplate on the imaging performance of a CMOS X-ray detector," J. Instrum., 19(12), P12003, 2024. [DOI 10.1088/1748-0221/19/12/P12003] (Submitted 8 October 2024; accepted for publication 14 November 2024; published 5 December 2024) 

I. K. Moon, S. Yoo, J. Choi, H. K. Kim† and Y. Kang†, "Flexible wood-based x-ray scintillator film using lead-free Cs3Cu2I5 perovskite nanoparticles," Small Struct., 5, 2400043, 2024. [DOI 10.1002/sstr.202400043] (Submitted 29 January 2024; published online 26 April 2024; issued 8 August 2024) 

H. Shin, S. Yoo, S. Oh, J. Lee, H. Kim, and H. K. Kim†, "Detective quantum efficiency of a double-layered detector for dual-energy x-ray imaging," J. Instrum., 18(11), C11005, 2023. [DOI 10.1088/1748-0221/18/11/C11005] (Submitted 11 September 2023; accepted for publication 3 November 2023; published 9 November 2023) 

S. Yoo, H. Shin, S. Oh, J. Lee, H. Kim, and H. K. Kim†, "Analysis of absorption signal and noise in thin phosphor detectors for high-energy transmission radiography," J. Instrum., 18(10), C10017, 2023. [DOI 10.1088/1748-0221/18/10/C10017] (Submitted 11 September 2023; accepted for publication 14 October 2023; published 23 October 2023) 

S. Oh, S. Yoo, H. Shin, J. Lee, D. U. Kim, and H. K. Kim†, "Signal and noise analysis of a metal oxide transistor-based flat-panel detector," J. Instrum., 18(10), C10016, 2023. [DOI 10.1088/1748-0221/18/10/C10016] (Submitted 11 September 2023; accepted for publication 14 October 2023; published 23 October 2023) 

J. Kim, S. Oh, and H. K. Kim†, "Fourier analysis of multi-scale neural networks implemented for high-resolution x-ray radiography," NDT&E Int., 139, 102923, 2023. [DOI 10.1016/j.ndteint.2023.102923] (Submitted 14 June 2022; revised 2 May 2023; accepted for publication 23 July 2023; published online 27 July 2023; record 5 August 2023) 

O. Oh, D. Kim, H. K. Kim, and S. W. Lee†, "Image reconstruction method in grating interferometer with phase stepping suing grating position and dose fluctuation correction," J. Instrum., 18(7), P07006, 2023. [DOI 10.1088/1748-0221/18/07/P07006] (Submitted 22 March 2023; accepted for publication 5 June 2023; published 4 July 2023) 

J. Park, J. Kim, C. H. Lim and H. K. Kim†, "Optical efficiency of scintillator‑coupled photodiode linear arrays for X‑ray cargo‑container inspection", J. Korean. Phys. Soc., 80, 928-939, 2022. [DOI 10.1007/s40042-022-00430-0] (Submitted 28 October 2021; Revised 29 December 2021; Accepted 29 December 2021) 

J. Kim, S. Yoo, J. Kim, and H. K. Kim†, "Towards subtraction angiography using a multi-layered X-ray detector", Phys. Medica, 95, 32-40, 2022. [DOI 10.1016/j.ejmp.2022.01.001] (Submitted 11 July 2021; Revised 9 December 2021; Accepted 4 January 2022) 

J. Kim and H. K. Kim†, "A novel method for estimating patient-specific primary dose in cone-beam computed tomography," Radiat. Prot. Dosim., 196(1-2), 71-84, 2021. [DOI 10.1093/rpd/ncab128] (Submitted 18 May 2021; Revised 12 July 2021; Accepted 4 August 2021) 

C. H. Lim, J. Lee, Y. Choi, J.-W. Park†, and H. K. Kim, "Advanced container inspection system based on dual-angle x-ray imaging method," J. Instrum., 16(8), P08037, 2021. [DOI 10.1088/1748-0221/16/08/P08037] (Submitted 24 April 2021; accepted for publication 8 June 2021; published 12 August 2021) 

J. Kim, H. Jeon and H. K. Kim†, "Monte Carlo dose assessment in dental cone-beam computed tomography," Radiat. Prot. Dosim., 193(3-4), 190-199, 2021. [DOI doi.org/10.1093/rpd/ncab039] (Submitted 11 October 2020; Revised 9 February 2021; Accepted 25 February 2021; Published 16 April 2021) 

J. Tanguay†, J. Kim, H. K. Kim, K. Iniewski, and I. A. Cunningham, "Frequency-dependent signal and noise in spectroscopic x-ray imaging," Med. Phys., 47(7), 2861-2901, 2020. [DOI 10.1002/mp.14160] (Received 31 October 2019; revised 17 March 2020; accepted for publication 18 March 2020; published 22 April 2020) 

J. Kim, J. Tanguay, I. A. Cunningham, and H. K. Kim†, "X-ray interaction characteristic functions in semiconductor detectors," J. Instrum., 15(3), C03029, 2020. [DOI 10.1088/1748-0221/15/03/C03029] (Submitted to J. Instrum. 30 September 2019; Revised: 11 December 2020; Accepted 4 February 2020; Published 17 March 2020) 

S. Ha, H. Youn, and H. K. Kim†, "Soft-tissue radiography using multi-scale convolutional neural networks," J. Instrum., 15(1), C01028, 2020. [DOI 10.1088/1748-0221/15/01/C01028] (Submitted to J. Instrum. 30 September 2019; Accepted 29 November 2019; Published 21 January 2020) 

Y. Ha, S. Ha, J. Kim, H. Youn, and H. K. Kim†, "High-resolution industrial radiography using convolutional neural networks," J. Instrum., 15(1), C01025, 2020. [DOI 10.1088/1748-0221/15/01/C01025] (Submitted to J. Instrum. 30 September 2019; Accepted 29 November 2019; Published 21 January 2020) 

J. Kim, J. Kim, D. W. Kim, J. Park, and H. K. Kim†, "Theoretical investigation of partially pixelated scintillators for high-resolution imaging with less aliasing," J. Instrum., 14, C12007, 2019. [DOI 10.1088/1748-0221/14/12/C12007] (Submitted to J. Instrum. 30 September 2019; Accepted 13 November 2019; Published 10 December 2019) 

S. Kam, D. W. Kim, S. Yun, and H. K. Kim†, "Power-law analysis of nonlinear active-pixel detector responses as a function of mammographic energy," Nucl. Instrum. Methods Phys. Res. A, 947, 162674, 2019. [DOI 10.1016/j.nima.2019.162674](Submitted to NIMA 22 May 2019; Revised 30 August 2019; Accepted 31 August 2019; Available online 3 September 2019; Published 21 December 2019) 

S. Ha, J. Kim, J. Yun, D. W. Kim, S. H. Kim, and H. K. Kim†, "Linear analysis of single-shot dual-energy computed tomography with a multilayer detector," J. Instrum., 14(1), C01022, 2019. [DOI 10.1088/1748-0221/14/01/C01022] (Submitted to J. Instrum. on 20 September 2018; Published on 23 January) 

D. W. Kim, J. Park, J. Kim, and H. K. Kim†, "Noise-reduction approaches to single-shot dual-energy imaging with a multilayer detector," J. Instrum., 14(1), C01021, 2019. [DOI 10.1088/1748-0221/14/01/C01021] (Submitted to J. Instrum. on 20 September 2018; Published on 22 January 2019) 

J. Kim, D. W. Kim, S. Kam, J. W. Park, C.-S. Shon, S. K. Heo, and H. K. Kim†, "Development of a large-area multilayer detector for single-shot dual-energy imaging," J. Instrum., 13(12), C12018, 2018. [DOI 10.1088/1748-0221/13/12/C12018] (Submitted to J. Instrum. on 20 September 2018; Published on 18 December 2018) 

J. Kim, J. Yun, S.-S. Kim, and H. K. Kim†, "Absorbed dose and noise in intensity-modulation dental computed tomography," J. Instrum., 13(12), C12011, 2018. [DOI 10.1088/1748-0221/13/12/C12011] (Submitted to J. Instrum. on 20 September 2018; Published on 11 December 2018) 

S. Lee, J. S. Kim, K. R. Ko, G. H. Lee, D. J. Lee, D. U. Kim, J. E. Kim, H. K. Kim, D. W. Kim, and S. Im†, "Direct thermal growth of large scale Cl-doped CdTe film for low voltage high resolution x-ray image sensor," Sci. Rep.-UK, 8, 14810, 2018. [DOI 10.1038/s41598-018-33240-1]

D. Kim, D. W. Kim, J. Yun, S. Ha, S. H. Kim, H. Youn, and H. K. Kim†, "Spatial resolution and blurring artefacts in digital x-ray tomosynthesis," IEEE Trans. Nucl. Sci., 65(5), 1180-1186, 2018. [DOI 10.1109/TNS.2018.2820744] (Submitted to IEEE Trans. Nucl. Sci. on 12 October 2017; Accepted at 26 Mar. 2018; Published at May 2018) 

H. Jeon, H. Youn, J. Nam†, J. Lee, J. Lee, D. Park, W. Kim, Y. Ki, D. Kim, and H. K. Kim, "Enhancement in the kV portal image contrast using depth normalization for accurate patient localization," J. Korean Phys. Soc., 72(4), 539-544, 2018. [DOI 10.3938/jkps.72.539] (Submitted at 7 Sep. 2017; Accepted at 25 Oct. 2017; Published at Feb. 2018) 

S. Ha, J. Yun, and H. K. Kim†, "Digital x-ray tomosynthesis with interpolated projection data for thin slab objects," J. Instrum., 12(11), C11032, 2017. [DOI 10.1088/1748-0221/12/11/C11032] (Accepted at 13 Nov. 2017) 

J. Yun, D. W. Kim, S. Ha, and H. K. Kim†, "Comparison of analytic and iterative digital tomosynthesis reconstructions for thin slab objects," J. Instrum., 12(11), C11030, 2017. [DOI 10.1088/1748-0221/12/11/C11030] (Accepted at 13 Nov. 2017) 

S. Yun, S. H. Kim, D. W. Kim, and H. K. Kim†, "Detective quantum efficiency of a phosphor-coupled photodiode array detector for use in digital x-ray tomosynthesis systems," NDT&E Int., 92, 130-135, 2017. [DOI 10.1016/j.ndteint.2017.08.003] (Submitted at 19 March 2017; accepted at 14 Aug 2017) 

T. Nano†, T. Escartin, E. Ismailova, K. S. Karim, J. Lindström, H. K. Kim, and I. A. Cunningham "MTF and DQE enhancement using an apodized-aperture x-ray detector design," Med. Phys., 44(9), 4525-4535, 2017. [DOI 10.1002/mp.12420]

H. Lee, J. Min, T. Lee, R. Pua, S. Sabir, K.-H. Yoon, H. K. Kim, and S. Cho†, "Investigation on beam-blocker-based scatter correction method for improving CT number accuracy," IEEE Trans. Nucl. Sci. 64(3), 908-914, 2017. [DOI 10.1109/TNS.2017.2669519]

S. Yun, H. K. Kim†, J. C. Han, S. Kam, H. Youn, and I. A. Cunningham, "Linear analysis of signal and noise characteristics of a CMOS active-pixel detector for mammography," Nucl. Instrum. Methods Phys. Res. A, 847, 104-110, 2017. [DOI 10.1016/j.nima.2016.11.049]

J. Kim, D. W. Kim, S. H. Kim, S. Yun, H. Youn, H. Jeon, and H. K. Kim†, "Linear modeling of single-shot dual-energy x-ray imaging using a sandwich detector," J. Instrum., 12(1), C01029, 2017. [DOI 10.1088/1748-0221/12/01/C01029]

D. W. Kim, J. C. Han, S. Yun, and H. K. Kim†, "Aging of imaging properties of a CMOS flat-panel detector for dental cone-beam computed tomography," J. Instrum., 12(1), P01005, 2017. [DOI 10.1088/1748-0221/12/01/P01005]

S. Y. Jang, H. K. Kim†, H. Youn, S. Cho, and I. A. Cunningham, "Fourier analysis of noise characteristics in cone-beam microtomography laboratory scanners," IEEE Trans. Biomed. Eng., 64(1), 173-183, 2017. [DOI 10.1109/TBME.2016.2552496] (Submitted to IEEE Transactions on Biomedical Engineering on 17 February 2015; accepted at 5 April 2016) 

D. W. Kim, J. Kim, S. Yun, H. Youn, and H. K. Kim†, "Cascaded-systems analysis of sandwich x-ray detectors," J. Instrum., 11(12), C12022, 2016. [DOI 10.1088/1748-0221/11/12/C12022]

J. W. Kim, J. Park, J. Kim, D. W. Kim, S. Yun, C. H. Lim, and H. K. Kim†, "Monte Carlo analysis of megavoltage x-ray interaction-induced signal and noise in cadmium tungstate detectors for cargo container inspection," J. Instrum., 11(11), C11021, 2016. [DOI 10.1088/1748-0221/11/11/C11021]

S. H. Kim, D. W. Kim, D. Kim, H. Youn, S. Cho, and H. K. Kim†, "Microtomography with sandwich detectors for small-animal bone imaging," J. Instrum., 11(10), P10011, 2016. [DOI 10.1088/1748-0221/11/10/P10011]

J. Kim, D. W. Kim, S. Kam, E. Park, H. Youn, and H. K. Kim†, "Effects of the energy-separation filter on the performance of each detector layer in the sandwich detector for single-shot dual-energy imaging," J. Instrum., 11(2), C02065, 2016. [DOI 10.1088/1748-0221/11/02/C02065]

H. Youn, D. Kim, S. H. Kim, S. Kam, H. Jeon, J. Nam, and H. K. Kim†, "A framework of modeling detector systems for computed tomography simulations," J. Instrum., 11(1), C01085, 2016. [DOI 10.1088/1748-0221/11/01/C01085]

S. H. Kim, D. W. Kim, H. Youn, D. Kim, S. Kam, H. Jeon, and H. K. Kim†, "Planar cone-beam computed tomography with a flat-panel detector," J. Instrum., 10(12), T12004, 18 2015. [DOI 10.1088/1748-0221/10/12/T12004]

O. Joe, H. K. Kim†, H. Youn, S. Kam, J. C. Han, S. Yun, S. Cho, and I. A. Cunningham, "Characterization of screen-printed mercuric iodide photoconductors for mammography," IEEE Trans. Nucl. Sci. 62(6), 3288-3296, 2015. [DOI 10.1109/TNS.2015.2497313] (Submitted to IEEE Transactions on Nuclear Science on 22 January 2015; Accepted at 26 October 2015; December 17 2015) 

H. Jeon, M. J. Chung†, S. Yun, J. Nam, J. Lee, D. Park, W. Kim, Y. Ki, and H. K. Kim, "Imaging responses of on-site CsI and Gd2O2S flat-panel detectors: Dependence on the tube voltages," J. Korean Phys. Soc., 67(1), 264-269, 2015. [DOI 10.3938/jkps.67.264] (Submitted to J. Korean Phys. Soc. on November 2014, Accepted May 2015). 

H. Jeon, D. Park, H. Youn, J. Nam, J. Lee, W. Kim, Y. Ki, Y. H. Kim, J. H. Lee, D. Kim, and, H. K. Kim†, "Generation of hybrid sinograms for recovery of kV-CT images with metal artifacts for helical tomotherapy," Med. Phys., 42(8), 4654-4667, 2015. [DOI 10.1118/1.4926552] (Accepted 25 June 2015). 

H. Youn, J. C. Han, S. Yun, S. Kam, S. Cho, and H. K. Kim†, "Characterization of on-site digital mammography systems: Direct versus indirect conversion detectors," J. Korean Phys. Soc., 66(12), 1926-1935, 2015. (Accepted June 2015). [DOI 10.3938/jkps.66.1926]

J. Tanguay†, S. Yun, H. K. Kim, and I. A. Cunningham, "Detective quantum efficiency of photon-counting x-ray detectors," Med. Phys., 42(1), 491-509, 2015. [DOI 10.1118/1.4903503]

Selected as the "Open Access Papers" by being collected as the "Editor's Picks". 

J. C. Han, H. K. Kim†, D. W. Kim, S. Yun, H. Youn, S. Kam, J. Tanguay, and I. A. Cunningham, "Single-shot dual-energy x-ray imaging with a flat-panel sandwich detector for preclinical imaging," Cur. Appl. Phys., 14(12), 1734-1742, 2014. [DOI 10.1016/j.cap.2014.10.012] (Submitted to Cur. Appl. Phys. on 9 January 2014, accepted 6 October 2014, published 25 October 2014). 

J. C. Han, S. Yun, H. Youn, S. Kam, S. Cho, T. G. Achterkirchen, and H. K. Kim†, "Fourier analysis of the imaging characteristics of a CMOS active pixel detector for mammography by using a linearization method," J. Korean Phys. Soc., 65(5), 770-777, 2014. [DOI 10.3938/jkps.65.770] (Submitted to J. Korean Phys. Soc. on 7 May 2014, accepted 23 June 2014, published 15 September 2014). 

S. Abbas, M. Park, J. Min, H. K. Kim, and S. Cho†, “Sparse-view computed laminography with a spherical sinusoidal scan for nondestructive testing”, Optics Express, 22(15), 17745-17755, 2014. [DOI 10.1364/OE.22.017745] (Accepted 24 June 2014). 

H. Youn, J. C. Han, S. Kam, S. Yun, and H. K. Kim†, "Energy calibration of energy-resolved photon-counting pixel detectors using laboratory polychromatic x-ray beams," Nucl. Instrum. Methods Phys. Res. A, 760, 79-85, 2014. [DOI 10.1016/j.nima.2014.05.097] (submitted to NIMA on 10 December 2013, accepted 24 May 2014, available online 1 June 2014, officially issued 1 October 2014). 

C. H. Lim, S. Kam, J. C. Han, S. Yun, H. Youn, M.-K. Moon, H. Jeon, and H. K. Kim†, "Effect of the phosphor screen optics on the Swank noise performance in indirect-conversion x-ray imaging detectors," J. Instrum., 9(5), C05053, May 2014. [DOI 10.1088/1748-0221/9/05/C05053]

S. Yun, H. K. Kim†, H. Jeon, J. Tanguay, and I. A. Cunningham, "Theoretical characterization of imaging performance of screen-printed mercuric iodide photoconductors for mammography," J. Instrum., 9(5), C05043, May 2014. [DOI 10.1088/1748-0221/9/05/C05043]

S. Yun, H. K. Kim†, H. Youn, J. Tanguay, and I. A. Cunningham, "Analytic model of energy-absorption response functions in compound x-ray detector materials," IEEE Trans. Med. Imaging, 32(10), 1819-1828, October 2013. [DOI 10.1109/TMI.2013.2265806] (submitted to IEEE Trans. Med. Imaging on 23 November 2012) 

S. Yun, J. Tanguay, H. K. Kim†, and I. A. Cunningham, "Cascaded-systems analyses and the detective quantum efficiency of single-Z x-ray detectors including photoelectric, coherent and incoherent interactions," Med. Phys., 40(4), 041916 (17pp.), 2013. [DOI 10.1118/1.4794495] (submitted to Med. Phys. on 18 October 2012, accepted 22 February 2013). 

J. Tanguay†, S. Yun, H. K. Kim, and I. A. Cunningham, "The detective quantum efficiency of photon-counting x-ray detectors using cascaded-systems analyses," Med. Phys., 40(4), 041913 (15pp.), 2013. [DOI 10.1118/1.4794499] (submitted to Med. Phys. on 7 December 2012, accepted 22 February 2013). 

H. R. Park, H. Youn, J. C. Han, S. H. Kam, and H. K. Kim†, "Finite element analysis of the effects of pixel geometry on the electrical properties in semiconductor pixel detectors," J. Korean Phys. Soc., 62(5), 813-819, 2013. [DOI 10.3938/jkps.62.813] (accepted to J. Korean Phys. Soc. on 21 February 2013, published 15 March 2013). 

M. K. Cho, H. Youn, S. Y. Jang, S. Lee, M.-C. Han, and H. K. Kim†, "Digital tomosynthesis in cone-beam geometry for industrial applications: Feasibility and preliminary study," Int. J. Precis. Eng. Manuf., 13(9), 1533-1538, September 2012. [DOI 10.1007/s12541-012-0202-4]

B. K. Cha†, J. Y. Kim, Y. J. Kim, S. Yun, G. Cho, H. K. Kim, C.-W. Seo, S. Jeon and Y. Huh, "Design and image-quality performance of high resolution CMOS-based x-ray imaging detectors for digital mammography," J. Instrum., 7(11), C04020, Apr 2012. [DOI 10.1088/1748-0221/7/04/C04020]

H. K. Kim†, C. H. Lim, J. Tanguay, S. Yun, and I. A. Cunningham, "Spectral analysis of fundamental signal and noise performances in photoconductors for mammography," Med. Phys., 39(5), 2478-2490, May 2012. [DOI 10.1118/1.3702455]

Selected for the April 15, 2012 issue of Virtual Journal of Biological Physics Research (which is an edited compilation of links to articles from participating publishers, covering a focused area of frontier research) http://www.vjbio.org 

M. K. Cho, H. K. Kim†, H. Youn, and S. S. Kim, "A feasibility study of digital tomosynthesis for volumetric dental imaging," J. Instrum., 7(3), 03007, March 2012. [DOI 10.1088/1748-0221/7/03/P03007]

M. K. Cho, H. Youn, S. Y. Jang, and H. K. Kim†, "Cone-beam digital tomosynthesis for thin slab objects," NDT&E Int., 47, 171-176, April 2012. [DOI 10.1016/j.ndteint.2012.01.008]

J. C. Park, B. Song†, J. S. Kim, S. H. Park, H. K. Kim, Z. Liu, T. S. Suh, and W. Y. Song†, "Fast compressed sensing-based CBCT reconstruction using Barzilai-Borwein formulation for application to on-line IGRT," Med. Phys., 39(3), 1207-1217, Mar 2012. [DOI 10.1118/1.3679865]

Ranked in "The 20 articles with the most full-text downloads during March 2012" at the Journal Homepage. 

S. Yun, J. C. Han, O. Joe, J. S. Ko, Y. S. Kim, and H.K. Kim†, "Characterization of imaging performances of gadolinium-oxysulfide phosphors made for x-ray imaging by using a sedimentation process," J. Korean Phys. Soc., 60(3), 514-520, Feb 2012. [DOI 10.3938/jkps.60.514]

Jung-Whan Min, Jin-Hyun Son, Hoi-Woun Jeong, Jung-Min Kim, Youl-Hun Seoung, Soon-Yong Son, Ho Kyung Kim, Sang-Young Kim, Do-Wan Lee, Jae-Yong Jung, Tae-Suk Suh, and Bo-Young Choe†, "Comparison of noise power spectrum methodologies in measurements by using megavoltage x-ray energies," J. Korean Phys. Soc., 60(1), 129-136, Jan 2012. [DOI 10.3938/jkps.60.129]

J. Tanguay, H. K. Kim, and I. A. Cunningham, "A theoretical comparison of x-ray angiographic image quality using energy-dependent and conventional subtraction methods," Med. Phys., 39(1), 132-142, Jan 2012. [DOI 10.1118/1.3658728]

S. Yun, H.K. Kim†, H. Youn, O. Joe, S. Kim, J. Park, D. G. Kang, Y. H. Sung, J. Marchal, J. Tanguay, and I. A. Cunningham, "Detective quantum efficiency of a silicon microstrip photon-counting detector having edge-on geometry under mammography imaging condition," J. Instrum., 6(12), C12006, Dec 2011. [DOI 10.1088/1748-0221/6/12/C12006]

H. K. Kim, "Practical expressions describing detective quantum efficiency in flat-panel detectors," J. Instrum., 6(11), C11020, Nov 2011. [DOI 10.1088/1748-0221/6/11/C11020]

H. Youn, H. K. Kim†, D. G. Kang, S. Kim, J. Park, J. Marchal, J. Tanguay, and I. A. Cunningham, "X-ray interaction-induced signal and noise performances of edge-on silicon microstrip detectors for digital mammography," J. Instrum., 6(11), C11004, Nov 2011. [DOI 10.1088/1748-0221/6/11/C11004]

S. Yun, C. H. Lim, H. K. Kim†, J. Tanguay, and I. A. Cunningham, "Finding the best photoconductor for digital mammography detectors," Nucl. Instrum. Methods Phys. Res. A, 652(1), 829-833, 2011. [DOI 10.1016/j.nima.2010.09.082] 

H. Youn, J. C. Han, M. K. Cho, S. Y. Jang, H. K. Kim†, J. H. Kim, J. Tanguay, and I. A. Cunningham, "Numerical generation of digital mammograms considering imaging characteristics of an imager," Nucl. Instrum. Methods Phys. Res. A, 652(1), 810-814, 2011. [DOI 10.1016/j.nima.2010.09.088] 

C. H. Lim, S. Yun, J. C. Han, H. K. Kim†, M. G. Farrier, T. Graeve Achterkirchen, M. McDonald, and I. A. Cunningham, "Characterization of imaging performance of a large-area CMOS active-pixel detector for low-energy x-ray imaging," Nucl. Instrum. Methods Phys. Res. A, 652(1), 500-503, 2011. [DOI 10.1016/j.nima.2010.09.081] 

Wonho Lee†, Taewoong Lee, Manhee Jeong, and Ho Kyung Kim, "Evaluation of dual gamma-ray imager with active collimator using various types of scintillators," Appl. Radiat. Isot. 69(10), 1560-1567, 2011. [DOI 10.1016/j.apradiso.2011.07.003]

Justin C. Park, Sung Ho Park, Jin Sung Kim†, Youngyih Han, Min Kook Cho, Ho Kyung. Kim, Zhaowei Liu, Steve B. Jiang, Bongyong Song, and William Y. Song†, "Ultra-fast digital tomosynthesis reconstruction using general-purpose GPU programming for image-guided radiation therapy," Technol. Cancer Res. Treat. 10(4), 295-306, 2011. [DOI 10.7785/tcrt.2012.500206]

C.-J. Park, H. K. Lee, W. Y. Song, T. Graeve Achterkirchen, and H. K. Kim†, "Defective pixel map creation based on wavelet analysis in digital radiography detectors," Nucl. Instrum. Methods Phys. Res. A, 634(1), 101-105, 2011. [DOI 10.1016/j.nima.2011.01.037] 

J. Tanguay, H. K. Kim†, and I. A. Cunningham, "The role of x-ray Swank factor in energy-resolving photon-counting imaging," Med. Phys., 37(12), 6205-6211, 2010. [DOI 10.1118/1.3512794]

Selected for the November 15, 2010 issue of Virtual Journal of Biological Physics Research (which is an edited compilation of links to articles from participating publishers, covering a focused area of frontier research) http://www.vjbio.org 

P. G. Jung, C. H. Lee, K. M. Bae, J. M. Lee, S. M. Lee, C. H. Lim, S. Yun, H. K. Kim, and J. S. Ko†, “Microdome-grooved Gd2O2S:Tb scintillator for flexible and high resolution digital radiography”, Optics Express, 18(4), 14850-14858, 2010. [DOI 10.1364/OE.18.014850]

Selected by the editor-in-chief, Gregory Faris, for publication in the Virtual Journal for Biomedical Optics (VJBO) http://vjbo.osa.org/virtual_issue.cfm 

H. K. Kim†, M. K. Cho, T. Achterkirchen, and W. Lee, "Radiation effects on the performance of CMOS photodiode array detectors and the role of gain-offset corrections," IEEE Trans. Nucl. Sci., 56(3), 1179-1183, 2009. [DOI 10.1109/TNS.2009.2014232]

S. Yun, H. K. Kim†, C. H. Lim, M. K. Cho, T. Achterkirchen, and I. Cunningham, "Signal and noise characteristics induced by unattenuated x rays from a scintillator in indirect-conversion CMOS photodiode array detectors," IEEE Trans. Nucl. Sci., 56(3), 1121-1128, 2009. [DOI 10.1109/TNS.2009.2014231]

H. K. Kim†, S. Yun, J. C. Han, H. Youn, M. K. Cho, C. H. Lim, S. K. Heo, C.-S. Shon, S.-S. Kim, B. H. Cho, and T. G. Achterkirchen, "Performance characterization of microtomography with complementary metal-oxide-semiconductor detectors for computer-aided defect inspection," J. Appl. Phys., vol. 105, no. 9, 094701, May 2009. [DOI 10.1063/1.3124360]

I. D. Jung, M. K. Cho, S. M. Lee, K. M. Bae, P. G. Jung, C. H. Lee, J. M. Lee, S. Yun, H. K. Kim, S. S. Kim, and J. S. Ko†, "Flexible Gd2O2S:Tb scintillator pixelated with polyethylene microstructures for digital x-ray image sensors," J. Micromech. Microeng., 19(1), 015014, 2009. [DOI 10.1088/0960-1317/19/1/015014]

Selected to be part of Journal of Micromechanics and Microengineering Highlights of 2009 collection. http://herald.iop.org/JMM/m50/jip/Highlights09/link/3488 

I. D. Jung, M. K. Cho, K. M. Bae, S. M. Lee, P. G. Jung, H. K. Kim, S. S. Kim, and J. S. Ko†, "Pixel-structured scintillator with polymeric microstructures for x-ray image sensors," ETRI J., 30(5), 747-749, 2008. [DOI 10.4218/etrij.08.0208.0166]

H. K. Kim†, I. A. Cunningham, Z. Yin, and G. Cho, "On the development of digital radiography detectors: A review," Int. J. Precis. Eng. Manuf., 9(4), 86-100, 2008. 

H. K. Kim†, S. M. Yun, J. S. Ko, G. Cho, and T. Graeve, "Cascade modeling of pixelated scintillator detectors for x-ray imaging," IEEE Trans. Nucl. Sci., 55(3), 1357-1366, 2008. [DOI 10.1109/TNS.2008.919260]

M. K. Cho, H. K. Kim†, T. Graeve, S. M. Yun, C. H. Lim, H. Cho, and J.-M. Kim, "Measurements of x-ray imaging performance of granular phosphors with direct-coupled CMOS sensors," IEEE Trans. Nucl. Sci., 55(3), 1338-1343, 2008. [DOI 10.1109/TNS.2007.913939]

H. Cho, S. Choi, Y. Koo, T. Kim, C. Ro, B. Lee, S. Kim, and H. Kim, "Performance evaluation of a digital intraoral imaging device based on the CMOS photosensor array coupled with an integrated x-ray conversion fiber-optic faceplate," Nucl. Instrum. Methods Phys. Res. A, 579(1), 330-333, 2007. [DOI 10.1016/j.nima.2007.04.071]

H. K. Kim, "Generalized cascaded model to assess noise transfer in scintillator-based x-ray imaging detectors," Appl. Phys. Lett., 89(23), 233504-1-233504-3, 2006. [DOI 10.1063/1.2398926]

C.-S. Shon, H. K. Kim†, M. K. Cho, M. H. Cheong, C. H. Lim, and J.-M. Kim, "Computational toolset for x-ray spectral analysis," Key Eng. Mater., 321-323, 1060-1065, 2006. [DOI 10.4028/www.scientific.net/KEM.321-323.1060]

J.-M. Kim, H. K. Kim†, M. H. Cheong, M. K. Cho, C.-S. Shon, and C. H. Lim, "Investigation of scintillation screens for x-ray imaging," Key Eng. Mater., 321-323, 1056-1059, 2006. [DOI 10.4028/www.scientific.net/KEM.321-323.1056]

M. K. Cho, H. K. Kim†, T. Graeve, and J.-M. Kim, "Characterization of CMOS pixel detectors for digital x-ray imaging," Key Eng. Mater., 321-323, 1052-1055, 2006. [DOI 10.4028/www.scientific.net/KEM.321-323.1052]

H. Cho, S. Choi, H. Kim, B. Lee, and S. Kim, "Gas electron multipliers for potential applications to digital radiography," Key Eng. Mater., 321-323, 125-128, 2006. [DOI 10.4028/www.scientific.net/KEM.321-323.125]

H. K. Kim, "Analytical model for incomplete signal generation in semiconductor detectors," Appl. Phys. Lett., 88(13), 132112-1-132112-3, 2006. [DOI 10.1063/1.2191742]

H. K. Kim†, M. K. Cho, S. K. Ahn, G. Cho, and H. Cho, "Electrical investigation of LIGA-processed gas electron multipliers," J. Korean Phys. Soc., 48(1), 40-46, 2006. 

H. S. Cho, M. H. Jeong, B. S. Han, S. Kim, B. S. Lee, H. K. Kim, and S. C. Lee, "Development of a portable digital radiographic system based on FOP-coupled CMOS image sensor and its performance evaluation," IEEE Trans. Nucl. Sci., 52(5), 1766-1772, 2005. [DOI 10.1109/TNS.2005.856792]

H. K. Kim†, J. K. Ahn, and G. Cho, "Development of a lens-coupled CMOS detector for an x-ray inspection system," Nucl. Instrum. Methods Phys. Res. A, 545(1-2), 210-216, 2005. [11 June 2005]       Erratum, Nucl. Instrum. Methods Phys. Res. A, 551(2-3), 575, 2005. [11 October 2005] [DOI 10.1016/j.nima.2005.01.310]

H. K. Kim, S. C. Lee, M. H. Cho, S. Y. Lee, and G. Cho, "Use of a flat-panel detector for microtomography: A feasibility study for small-animal imaging," IEEE Trans. Nucl. Sci., 52(1), 193-198, 2005. [DOI 10.1109/TNS.2004.843107]

Y. K. Kim, H. K. Kim, G. Cho, and D. K. Kim, "Effect of yttria substitution on the light output of (Gd,Y)2O3:Eu ceramic scintillator," Nucl. Instrum. Methods Phys. Res. B, 225(3), 392-396, 2004. [September 2004] [DOI 10.1016/j.nimb.2004.03.087]

S. C. Lee, H. K. Kim, I. K. Chun, M. H. Cho, M. H. Cho, and S. Y. Lee, "Development and characterization of a flat-panel detector-based microtomography system," Key Eng. Mater., 270-273, 245-251, 2004. [DOI 10.4028/www.scientific.net/KEM.270-273.245]

Y. K. Kim, H. K. Kim, D. K. Kim, and G. Cho, "Synthesis of Eu-doped (Gd,Y)2O3 transparent optical ceramic scintillator," J. Mater. Res., 19(2), 413-416, 2004. [February 2004] [DOI 10.1557/jmr.2004.19.2.413]

S. C. Lee, H. K. Kim, I. K. Chun, M. H. Cho, S. Y. Lee, and M. H. Cho, "A flat-panel detector based micro-CT system: Performance evaluation for small-animal imaging," Phys. Med. Biol., 48(24), 4173-4185, 2003. [5 December 2003] [DOI 10.1088/0031-9155/48/24/014]

H. J. Kim, H. K. Kim, G. Cho, and J. Choi, "Construction and characterization of an amorphous silicon flat-panel detector based on ion-shower doping process," Nucl. Instrum. Methods Phys. Res. A, 505(1-2), 155-158, 2003. [1 June 2003] [DOI 10.1016/S0168-9002(03)01040-4]

H. Cho, H. Yoon, S. Han, and H. Kim, "Operating characteristics of open and closed-end gas electron multipliers," J. Korean Phys. Soc., 42(1), 56-59, 2003. [January 2003] 

H. K. Kim, G. Cho, D. K. Kim, and H. Cho, "Gas electron multiplier made by deep-etch x-ray lithography," J. Korean Phys. Soc., 40(5), 812-819, 2002. [May 2002] 

H. K. Kim, G. Cho, and H. Cho, "Performance of microdot detectors for 50-, 100-, and 200-mm pitches based on the amorphous silicon process," J. Korean Phys. Soc., 39(2), 218-224, 2001. [August 2001] 

S. W. Lee, H. K. Kim, G. Cho, Y.H. Shin, and Y.Y. Won, "A 3-D x-ray microtomographic system with a CMOS image sensor," IEEE Trans. Nucl. Sci., 48(4), 1503-1505, 2001. [August 2001] [DOI 10.1109/23.958387]

G. Cho, H. K. Kim, Y. H. Chung, D. K. Kim, H. K. Lee, T. S. Suh, and K. S. Joo, "Monte Carlo analyses of x-ray absorption, noise, and detective quantum efficiency considering therapeutic x-ray spectrum in portal imaging detector," IEEE Trans. Nucl. Sci., 48(4), 1423-1427, 2001. [August 2001] [DOI 10.1109/NSSMIC.2000.949294]

H. K. Kim, G. Cho, S. W. Lee, Y. H. Shin, and H. S. Cho, "Development and evaluation of a digital radiographic system based on CMOS image sensor," IEEE Trans. Nucl. Sci., 48(3), 662-666, 2001. [June 2001] [DOI 10.1109/NSSMIC.2000.949394]

I. J. Park, J. G. Kim, H. K. Kim, W. S. Hong, S. H. Han, V. Perez-Mendez, J. Kadyk, W. Wenzel, and K. S. Joo, "Columnar cesium iodide (CsI) and micro-hole arrays for use in gas avalanche detectors," IEEE Trans. Nucl. Sci., 47(6), 1820-1824, 2000. [December 2000] [DOI 10.1109/23.914452]

S. H. Han, W. S. Hong, H. K. Kim, J. G. Kim, I. J. Park, J. Kadyk, W. Wenzel, and V. Perez-Mendez, "Insensitive zones and space resolution of microdot (MDOT) detectors of 50, 100 and 200 micron pitch," IEEE Trans. Nucl. Sci., 47(4), 1416-1420, 2000. [August 2000] [DOI 10.1109/NSSMIC.1999.845755]

H. K. Kim, K. Jackson, W. S. Hong, I. J. Park, S. H. Han, J. Kadyk, V. Perez-Mendez, W. Wenzel, and G. Cho, "Application of the LIGA process for fabrication of gas avalanche devices," IEEE Trans. Nucl. Sci., 47(3), 923-927, 2000. [June 2000] [DOI 10.1109/NSSMIC.1999.845749]

H. K. Kim, G. Cho, Y. H. Chung, H. K. Lee, and S. C. Yoon, "Monte Carlo studies of metal/phosphor screen in therapeutic x-ray imaging," Nucl. Instrum. Methods Phys. Res. A, 422(1-3), 713-717, 1999. [11 February 1999] [DOI 10.1016/S0168-9002(98)01023-7]

G. Cho, H. K. Kim, H. Woo, G. Oh, and D. K. Ha, "Electronic dose conversion technique using a NaI(Tl) detector for assessment of exposure dose rate from environmental radiation," IEEE Trans. Nucl. Sci., 45(3), 981-985, 1998. [June 1998] [DOI 10.1109/23.682692]