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Erosive Effect of Salad Dressing on Flowable Composite Resin Surfaces

Kwon NH, Jung IH, Kim YJ, Lee JY, Jung NS, Jeong HW, Lim DS

Background: The purpose of this study was to investigate the effect of salad dressings on the flowable composite resin surface and the erosion-inhibitory effect of calcium. Methods: The experiment included six...
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Dead Layer Thickness and Geometry Optimization of HPGe Detector Based on Monte Carlo Simulation

Yu S, Kwon NH, Jang YJ, Lee B, Yu J, Kim DW, Cho GS, Kim KB, Kim GB, Baek CH, Choi SH

Purpose: A full-energy-peak (FEP) efficiency correction is required through a Monte Carlo simulation for accurate radioactivity measurement, considering the geometrical characteristics of the detector and the sample. However, a relative...
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Review of Shielding Evaluation Methodology for Facilities Using kV Energy Radiation Generating Devices Based on the NCRP-49 Report

Kwon NH, Park HS, Kim T, Kim SR, Kim KB, Kim JS, Choi SH, Kim DW

In this study, we have investigated the shielding evaluation methodology for facilities using kV energy generators. We have collected and analysis of safety evaluation criteria and methodology for overseas facilities...
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Measurements of Neutron Activation and Dose Rate Induced by High-Energy Medical Linear Accelerator

Kwon NH, Jang YJ, Kim J, Kim KB, Yoo J, Ahn SH, Kim DW, Choi SH

Purpose: During the treatments of cancer patients with a linear accelerator (LINAC) using photon beams with energies ≥8 MV, the components inside the LINAC head get activated through the interaction...
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Status of Domestic and International Recommendations for Protection Design and Evaluation of Medical Linear Accelerator Facilities

Choi SH, Shin DO, Shin Ji, Kwon NH, Ahn SH, Kim DW

Various types of high-precision radiotherapy, such as intensity-modulated radiation therapy (IMRT), tomotherapy (Tomo), and stereotactic body radiation therapy have been available since 1997. After being covered by insurance in 2015,...
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Trend Analysis on Korean and International Management for Activated Material Waste from Medical Linear Accelerator

Kwon NH, Jang YJ, Kim DW, Shin DO, Kim KB, Kim JS, Choi SH

This study investigated and analyzed the Korean and international status of radioactive waste management for medical linear accelerators (linacs) and proceed prior research to suggest radiation safety regulations and guidelines...
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Analysis of Radionuclides for Induced-Radioactive Waste from Medical Linear Accelerator

Kwon NH, Kim DW, Shin DO, Kim JS, Choi SH

  • KMID: 2510054
  • Prog Med Phys.
  • 2020 Sep;31(S1):S26.
Purpose: Linear accelerator (Linac) with 10 MV or higher energy generates photo-neutron through photo-nuclear reaction. As components of Linac are activated by neutron, analyzing radioactive waste in the process of...
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Methionyl-tRNA Synthetase is a Useful Diagnostic Marker for Lymph Node Metastasis in Non-Small Cell Lung Cancer

Lee JM, Kim T, Kim EY, Kim A, Lee DK, Kwon NH, Kim S, Chang YS

PURPOSE: Identification of lymph node (LN) metastasis in non-small cell lung cancer (NSCLC) is critical for disease staging and selection of therapeutic modalities. Sometimes it is not possible to obtain...
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Risk Factors of Failure of Ibuprofen Treatment in Preterm Infants with Hemodynamically Significant Patent Ductus Arteriosus

Kwon NH, Lee JH, Jeon GW, Sin JB

PURPOSE: In this study, the risk factors of failure of ibuprofen treatment in preterm infants with hemodynamically significant patent ductus arteriosus (hsPDA) were investigated. METHODS: Among 403 preterm infants (
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A Concealed Brugada Electrocardiogram Pattern Revealed after Administering Propafenone to a Patient with Atrial Fibrillation

Sim HH, Kwon NH, Baeg JY, Yun CY, Ahn SM, Oh YM, Kim YJ

Brugada syndrome is characterized by sudden cardiac death associated with ventricular tachyarrhythmia in patients without structural heart disease. We recently observed a case of concealed Brugada ECG pattern, which appeared...
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Vertically Transmitted Severe Coxsackievirus B Infection in Four Preterm Twins Presented

Jung JS, Kwon NH, Jeon GW, Sin JB

During summer and fall months (from June to November), enteroviral infection is more common than group B streptococcal infection or herpes simplex viral infection in neonates. Enteroviruses are divided into...
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Clinical Manifestations and Characteristics in Patients with Horseshoe Kidney

Kim YK, Kwon NH, Kang DI, Chung WY

  • KMID: 2098913
  • J Korean Soc Pediatr Nephrol.
  • 2013 Oct;17(2):73-78.
PURPOSE: We aimed to investigate the clinical characteristics and associated diseases in children with a horseshoe kidney and compared these data between children and adults. METHODS: We performed a retrospective analysis...
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A Validation Study for the Korean Version of Chronic Obstructive Pulmonary Disease Assessment Test (CAT)

Hwang YI, Jung KS, Lim SY, Lee YS, Kwon NH

  • KMID: 2320425
  • Tuberc Respir Dis.
  • 2013 Jun;74(6):256-263.
BACKGROUND: Health status measure is not only important for clinical research studies but also for clinical practices of chronic obstructive pulmonary disease (COPD) patients. The objective of this study is...
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Prevalence of Congenital Coronary Artery Anomalies of Korean Men Detected by Coronary Computed Tomography

Park JH, Kwon NH, Kim JH, Ko YJ, Ryu SH, Ahn SJ, Kim YJ, Baeg JY, Kim JI

BACKGROUND AND OBJECTIVES: It has been demonstrated that the anomalous origin of coronary arteries (AOCA) are generally asymptomatic and rare diseases. However, some cases can cause severe life threatening events....
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Multiple Bowen's Disease: In a Veteran Who Participated in Vietnam War

Kwon NH, Lee BI, Kim HS, Park YM, Kim HO, Lee JY

No abstract available.
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Clinicopathologic Manifestations of Patients with Fordyce's Spots

Lee JH, Lee JH, Kwon NH, Yu DS, Kim GM, Park CJ, Lee JD, Kim SY

No abstract available.
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Gianotti-Crosti Syndrome Following Novel Influenza A (H1N1) Vaccination

Kwon NH, Kim JE, Cho BK, Park HJ

  • KMID: 2383267
  • Ann Dermatol.
  • 2011 Nov;23(4):554-555.
No abstract available.
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Idiopathic Calcinosis Cutis: Clinical and Histopathologic Review in a Series of 30 Patients (2000-2009)

Kwon NH, Kim HS, Lee JY, Kim HO, Park YM

  • KMID: 1451724
  • Korean J Dermatol.
  • 2011 Oct;49(10):907-914.
BACKGROUND: Idiopathic calcinosis cutis (CC) is currently sub-classified as tumoral CC, sub-epidermal calcified nodules, idiopathic CC of the scrotum, and milia-like CC. This sub-classification system is obscure and can be...
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A Case of Balanced Type Double Aortic Arch Diagnosed Incidentally by Transthoracic Echocardiography in an Asymptomatic Adult Patient

Seo HS, Park YH, Lee JH, Hur SC, Ko YJ, Park SY, Kim JH, Kim YJ, Kim SY, Kwon NH

A 36-year-old male patient with no remarkable medical history was admitted to our hospital for a health check up. On chest radiography, bilateral aortic notches at the level of aortic...
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Glomus Tumor Arising in a Nose

Kwon NH, Lee JH, Kim KM, Kim SY

  • KMID: 1451600
  • Korean J Dermatol.
  • 2011 May;49(5):461-463.
Glomus tumor is composed of a benign neoplasm arising from the glomus body, which participates in thermal regulation. It usually presents as a circumscribed or solitary tumor characterized by paroxysmal...
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