1.A Case of Eosinophilic Gastroenteritis Associsted with Protein - losing Enteropathy.
Jong Jae PARK ; Hoon Ki PARK ; Suk Kee PAIK ; Jung Lyae HYUN ; Tong Jhin KIM
Korean Journal of Gastrointestinal Endoscopy 1994;14(1):74-81
Eosinophilic gastroenteritis is characterized by peripheral eosinophilia, eosinophilic infiltration of the bowel and gastrointestinal symptoms. The disease may affect any area of the gastrointestinal tract. Various manifestations are present, corresponding to the predominant layer of the eosinophilic infiltration. We experienced a case of eosinophilic gastroenteritis presenting as protein-losing enteropathy in a 36-year old male patient with acute upper abdominal pain and watery diarrhea. He showed peripheral eosinophilia, hypoalbuminemia, penile., thigh and ankle edema. The patient was treated with oral corticosteroid, and supportive care such as parenteral albumin, fluid and electrolytes. Almost all symptoms resloved within 1 week. The present report concerns a case of eosinophilic gastroenteritis associated with protein loss. Cases, of eosinophilic gastroenteritis with protein-losing enteropathy are not common. To our knowledge, no case has reported in Korea. So we report this case with brief review of the literature.
Abdominal Pain
;
Adult
;
Ankle
;
Diarrhea
;
Edema
;
Electrolytes
;
Eosinophilia
;
Eosinophils*
;
Gastroenteritis*
;
Gastrointestinal Tract
;
Humans
;
Hypoalbuminemia
;
Korea
;
Male
;
Protein-Losing Enteropathies
;
Thigh
2.Effect of Transverse Magnetic Field on Dose Distribution of High Energy Electron Beam.
Young Kee OH ; Ki Hwan KIM ; Kyo Chul SHIN ; Jhin Kee KIM ; Jeung Kee KIM ; Dong Hyeok JEONG ; Mun Jun CHO ; Jun Sang KIM ; Sun Min YOON ; Sung Kyu KIM
Korean Journal of Medical Physics 2007;18(4):209-213
In this work we have measured the dose distribution and the percent depth dose of 20 MeV electron beam using the X-OMAT films in order to verify the effects of transverse magnetic field on high energy elecrtron beam in a phantom. The result shows about 30% increase of the percent depth dose at 4.5 cm depth under the transverse magnetic field of 1.5 Tesla at 7.5 cm depth. We have verified that these were in an agreement with other theoretical results.
Magnetic Fields*
3.Monte Carlo Calculation on the Dose Modulation Using Dynamic Magnetic Fields for 10 MV X-rays.
Ki Hwan KIM ; Young Kee OH ; Kyo Chul SHIN ; Jhin Kee KIM ; Dong Hyeok JEONG ; Jeung Kee KIM ; Moon June CHO ; Sun Young KIM
Korean Journal of Medical Physics 2007;18(4):221-225
Monte Carlo calculations were performed to demonstrate the dose modulation with dynamic magnetic fields in phantom. The goal of this study is to obtain the uniform dose distributions at a depth region as a target on the central axis of photon beam under moving transverse magnetic field. We have calculated the depth dose curves for two cases of moving magnetic field along a depth line, constant speed and optimal speed. We introduced step-by-step shift and time factor of the position of the electromagnet as an approximations of continuous moving. The optimal time factors as a function of magnetic field position were calculated by least square methods using depth dose data for static magnetic field. We have verified that the flat depth dose is produced by varying the speed of magnetic field as a function of position as a results of Monte Carlo calculations. For 3 T magnetic field, the dose enhancement was 10.1% in comparison to without magnetic field at the center of the target.
Axis, Cervical Vertebra
;
Magnetic Fields*
;
Magnets
;
Time Factors
4.Accuracy Evaluation of Treatment Planning System Using Irregular-surface Water Phantom.
Dong Hyeok JEONG ; Ki Hwan KIM ; Kang Kyoo LEE ; Sun Rock MOON ; Jhin Kee KIM ; Kyo Chul SHIN ; Young Kee OH ; Jeung Kee KIM ; Moon June CHO ; Jun Sang KIM
Korean Journal of Medical Physics 2008;19(2):131-138
We evaluated on the calculation accuracy of treatment planning system (TPS) with phantom having convex and concave surface. The TPS is Eclipse (Varian, USA) using both algorithms AAA and PBC for photon dose calculations. PBC algorithms have three corrections of Batho, modified Batho (M-Batho), and equivalent TAR (E-TAR). The field sizes were 10x10 cm2 and 20x20 cm2, and MLC-shaped fields for these fields. We measured doses at three depths 5, 10 and 15 cm in phantom of SSD=90 cm in the condition of inserted farmer chamber. For given conditions, we have calculated dose with these algorithms and compared them with measured doses. In AAA the calculated doses (dose/MU) were agreed to measured doses within +/-1% in flat and convex surface and were under estimated with -1.9% maximum in concave surface. In PBC the calculated doses were over estimated with +1.7% and +4.1% respectively in flat and convex surface and the differences were from -3.1% to +2.1% in concave surface. In comparison of criteria from AAPM and IAEA reports, and statistical analysis for these results, it is found that the AAA's results are in good agreement with measured values and the M-Batho's results are generally good agreed with measured values among PBC algorithms.
Water
5.Study for Multi Channel Radiation Detector Using of Microfilm and Carbon Electrode.
Kyo Chul SHIN ; Hyong Geun YUN ; Dong Hyeok JEONG ; Yong Kee OH ; Jhin Kee KIM ; Ki Hwan KIM ; Jeung Kee KIM
Korean Journal of Medical Physics 2005;16(3):111-115
We have designed the multi channel detector for the quality assurance of clinical photon beams. The detector was composed of solid phantom inserted by six plane-parallel ionization chambers at different depth. The chamber as a mini plane parallel chamber was made of carbon coated microfilms. In this study the electrical characteristics of the six chambers in the solid phantom were evaluated using 6 MV photon beam. The leakage currents were less than 0.5 pA, reproducibility was less than 0.5%, linearity was less than 0.5%, and dose rate effect was less than 0.7%. In addition the effect of dose variation from other chambers was estimated to maximum 0.8% approximately. The developed detector can be used for quality determination in output dosimetry or measurement of percentage depth dose approximately for clinical photon beam.
Carbon*
;
Electrodes*
6.Quality Correction for Ir-192 Gamma Rays in Air Kerma Strength Dosimetry Using Cylindrical Ionization Chambers.
Dong Hyeok JEONG ; Jhin Kee KIM ; Ki Hwan KIM ; Young Kee OH ; Soo Kon KIM ; Kang Kyoo LEE ; Sun Rock MOON
Korean Journal of Medical Physics 2009;20(1):30-36
The quality correction in the air kerma dosimetry for Ir-192 using farmer type ionization chambers calibrated by Co-60 quality is required. In this study we determined quality factor (kappa u) of two ionization chambers of PTW-N30001 and N23333 for Ir-192 source using dosimetric method. The quality factors for energy spectrum of microSelectron were determined as kappa u=1.016 and 1.017 for PTW-N30001 and N23333 ionization chambers respectively. We applied quality factors in air kerma dosimetry for microSelectron source and compared with reference values. As a results we found that the differences between reference air kerma rate and measured it with and without quality correction were about -0.5% and -2.0% respectively.
Gamma Rays
;
Reference Values
7.The Prevalence and Clinical Characteristics of Hepatitis-delta Infection in Korea.
Sook Hyang JEONG ; Jung Min KIM ; Heui June AHN ; Myung Joon PARK ; Kwang Hyun PAIK ; Won CHOI ; Jin KIM ; Chul Joo HAN ; Yoo Cheoul KIM ; Jhin Oh LEE ; Young Joon HONG ; Hyo Young PARK ; Ha Hyun JEONG ; Mi Yong YOON ; Myungjin LEE ; Kee Ho LEE
The Korean Journal of Hepatology 2005;11(1):43-50
BACKGROUND/AIMS: The prevalence of hepatitis delta virus (HDV) infection has been estimated as being approximately 5% among global HBsAg carriers. The anti-delta positive rate in Koreans had been reported as being 0.85% in 1985. While the prevalence of HBV has been decreased from nearly 10% to 5% during the past twenty years, there have been no more studies on the anti-delta prevalence in Koreans. The aim of this study was to estimate the anti-delta prevalence in Koreans and to study the clinical characteristics of anti-delta positive patients in a single center. METHODS: Serum anti-delta was measured in one hundred ninety four HBsAg-positive patients who were admitted to our hospital from February 2003 to August 2003. We checked the genotypes of the HBV in the anti-delta positive patients. The clinical features of the anti-delta positive patients were compared to those clinical features of the anti-delta negative patients from the aspect of age, gender, mode of transmission, the positivity of HBeAg and serum HBV DNA. RESULTS: Serum anti-delta was positive in seven patients among the 194 subjects, giving a 3.6% positive rate. Among these seven patients, six had hepatocellular carcinoma (HCC) and the other one had cholangiocarcinoma. All of the anti-delta positive patients had the C genotype of HBV. The anti-delta positive patients showed significantly suppressed HBV DNA replication compared to the anti-delta negative patients. CONCLUSIONS: In Koreans, anti-delta was positive mainly in HCC patients with an approximate prevalence of 4%, and this rate has not changed much for the past twenty years. HBV DNA replication was suppressed by HDV infection.
Adult
;
Carcinoma, Hepatocellular/virology
;
English Abstract
;
Female
;
Hepatitis Antibodies/analysis
;
Hepatitis D/complications/*epidemiology/immunology
;
Hepatitis Delta Virus/immunology
;
Hepatitis delta Antigens/analysis
;
Humans
;
Korea/epidemiology
;
Liver Neoplasms/virology
;
Male
;
Middle Aged
;
Prevalence