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오기근(Ki Keun Oh),권태희(Tae Hee Kwon),김상진(Sang Jin Kim),김덕희(Duk Hee KIm) 대한소화기학회 1985 대한소화기학회지 Vol.17 No.1
N/A Meckel,s diverticulum is remnant of the omphalomesentric duct that arises along the antimesenteric border approximate 100cm proximal to the terminal ileum and is found in 1-3 percents of general population. Meckel's diverticulum is frequently misdiagnosed preoperatively and roentgenographic demonstration is unusually successful in the past. But in 1970, use of Pertechnate anion(99mTcO4-) for the noninvasive diagnosis of Meckel's diverticulum with ectopic gastric mucosa was introduced into clinical practice by Duszynski et al. Ectopic gastric mucosa is found in about 60 percents of these diverticulum. Patients with causing acute abdominal symptoms, intermittant bloody stool were examination with 99mTc pertechnate of the abdomen may help to establish the diagnosis by showing high uptake in Meckel's diverticulum and provides the more sensitive, specipic evaluation in this setting and is the radiographic procedure of choice. Authors analyzed two cases who have been found Meckel's diverticulum in 99mTc pertechnate scintigraphy.
지훈,이경상,오기근,홍창호,최형기,정우희,양문희,Ji, Hoon,Lee, Kyoung-Sang,Oh, Ki-Keun,Hong, Chang-Ho,Choi, Hyoung-Ki,Jung, Woo-Hee,Yang, Moon-Hee 대한영상의학회 1987 대한영상의학회지 Vol.23 No.2
Xanthogrnulomatous pyelonephritis is an uncommon disease, which is usually seen in middle aged women and is quite rare in children. Authors report a case of focal xanthogranulomatous pyelonephritis in a 63 day old boy who had a partly functioning right kidney on IVP. On ultrasonogram and CT scan, well demarcated multiple septated cystic mass with enhancing rim was noted in right pole, suggesting as multilocular cyst or cystic Wilms'tumor rath than chronic infection at that time, which was proven as xanthogranulomatous pyelonephritis. Here a case of xanthogranulomatous pyelonephritis in infant is presented with review of literature.
서창옥,이희대,이경식,정우희,오기근,김귀언,Suh Chang Ok,Lee Hy De,Lee Kyung Sik,Jung Woo Hee,Oh Ki Keun,Kim Gwi Eon The Korean Society for Radiation Oncology 1994 Radiation Oncology Journal Vol.12 No.3
병기 1기, 2기 유방암에서 유방보존적 수술 후 방사선치료는 기존의 유방전적출술을 대치할 수 있는 치료법으로 정립되었다. 연세암센터에서는 1991년 부터 유방보존술을 적극적으로 시행하였고 첫 3년동안 140예를 치료하였다. 목적 : 연세암센터에서 시행하고 있는 유방보존술의 적응증, 치료방침과 방사선치료 방법을 소개하고 결과 및 방사선치료의 부작용을 보고하고자 한다. 방법 : 1991년 1월부터 1992년 12월까지 연세암센터 치료방사선과에서 유방보존적수술 후 근치적 방사선치료를 받았던 64명의 조기 유방암 환자를 대상으로 하였다. 모든 환자들은 종괴 또는 병변을 포함한 부분유방절제술과 액와임파절 곽청술을 시행받은 후 방사선치료를 받았다. 방사선치료는 수술후 3-18주에 시행되었는데 선형가속기 4MV X-ray를 사용하여서 침범된 유방 전체에 4500-5040 cGy를 5-6주에 걸쳐서 조사하였고 원발 병소 주변에 전자선을 사용하여서 1-2주에 걸쳐서 1000-2000 cGy를 추가 조사하였다. 치료를 받았던 환자들의 임상적 특성과 치료방법, 방사선치료에 따르는 부작용, 재발 여부 등을 분석하였다. 결과 : 대상환자들의 연령은 23세에서 59세로 중앙값이 40세 였다. 총 64명중 T1은 27명, T2는34명 이었으며 3명은 비침윤성 암이었다. 또한 전체의 $42.2\%$인 27명은 액와임파절 침윤이 있었다. 추적 기간(6-30개월, 중앙값 14개월) 동안 1예의 유방내 재발과 2예의 원격 전이가 관찰되었는데 유방내 재발은 원발병소와 다른 사분원에 위치하여서 처음 진단에서 발견하지 못했던 유방조영술상의 미세석회화음영에서 종괴가 자랐던 예로 다시 유방전적출술을 받은 후 무병생존 중이다. 방사선치료 중 또는 추적 기간 동안 치료를 요하는 부작용으로는 1예에서만 방사선 폐렴이 있었으나 대증요법 으로 완쾌되었다. 결론 : 추적 기간이 짧기 때문에 국소재발율, 생존율, 미용효과 등의 치료 결과를 평가하기는 이르지만 조기 유방암에서 유방보존적 수술과 근치적 방사선치료는 심한 급성 또는 아급성 부작용이 없는 안전하고 편안한 치료법임을 확인할 수 있었다. 또한 국소재발율을 낮추기 위해서는 유방보존술에 적합한 환자들을 선택하기 위한 철저한 평가가 필수적임을 알 수 있었다. Breast conserving surgery and irradiation is now accepted as preferable treatment method for the patients with stage I and II breast cancer. Our institution activated team approach for breast conservation in 1991 and treated one hundred and fourty patients during the next three years. Purpose : To present our early experience with eligibility criteria, treatment techniques, and the morbidities of primary radiotherapy. Materials and Methods: Sixty four patients with early stage breast cancer who received breast conserving treatment between January 1991 and December 1992 were evaluated. All patients received partial mastectomy(wide excision to quadrantectomy) and axillary node dissection followed by radiotherapy. Total dose of 4500-5040 cGy in 5-5 1/2 weeks was given to entire involved breast and boost dose of 1000-2000 cGy in 1-2 weeks was given to the primary tumor site. Linac 4 MV X-ray was used for breast irradiation and electron beam was used for boost. Thirty five Patients received chemotherapy before or after radiotherapy. Patients characteristics, treatment techniques, and treatment related morbidities were analyzed. Results : Age distribution was ranged from 23 to 59 year old with median age of 40. Twenty-seven patients had T1 lesions and 34 patients had T2 lesions. In three patients, pathologic diagnosis was ductal carcinoma in situ. Thirty-seven Patients were N0 and 27 patients were Nl. There were three recurrences, one in the breast and two distant metastases during follow-up period(6-30 months, median 14 months). Only one breast recurrence occured at undetected separate lesion with microcalcifications on initial mammogram. There was no serious side reaction which interrupted treatment courses or severe late complication. Only one symptomatic radiation pneumonitis and one asymptomatic radiation pneumonitis were noted. Conclusions: Conservative surgery and primary radiotherapy for early breast cancer is Proven to be safe and comfortable treatment method without any major complication. Long-term follow up is needed to evaluate our treatment results in terms of loco-regional control rate, survival rate, and cosmetic effect.
전자뇌관과 미진동폭약을 활용한 보안물건 초근접 구간에서의 터널발파공법 적용에 관한 연구
오세영 ( Sei Young Oh ),이천식 ( Chun Sik Lee ),이기근 ( Ki Keun Lee ),이동희 ( Dong Hee Lee ),이승재 ( Seung Jae Lee ),박종호 ( Jong Ho Park ) 대한화약발파공학회 2017 화약발파 Vol.35 No.4
Due to civil complaints on vibrations and noises arising from blasting, mechanical excavation has been widely used for tunneling rather than the method of blasting, especially in the case of being in a close-proximity of 10M-20M range to a safety-thing. However, mechanical excavation, though less, it does increase the cost of whole construction project as the period of excavation is much prolonged from lack of constructability. This study aims to research and develop an effective blasting method that can ensure the constructability of shortened excavation period whilst not compromising the safety of the safety-things in a proximity to the blasting site by using a combination of an electronic detonator that can accurately control its delay period and a Low Vibration Explosives(LoVEX) that is effective on vibration control.
진행파의 코리올리효과를 이용한 자가발진형 표면탄성파 초소형 자이로스코프
오해관(Hae-Kwan Oh),최기선(Ki-Sun Choi),이형근(Hyung-Keun Lee),이기근(Kee-Keun Lee),양상식(Sang-Sik Yang) 대한전기학회 2010 전기학회논문지 Vol.59 No.2
An 80㎒ surface acoustic wave (SAW)-based gyroscope utilizing a progressive wave was developed on a piezoelectric substrate. The developed sensor consists of two SAW oscillators in which one is used for sensing element and has metallic dots in the cavity between input and output IDTs. The other is used for a reference element. Coupling of mode (COM) modeling was conducted to determine the optimal device parameters prior to fabrication. According to the simulation results, the device was fabricated and then measured on a rate table. When the device was subjected to an angular rotation, oscillation frequency differences between the two oscillators were observed because of the Coriolis force acting on the metallic dots. Depending on the angular rate, the difference of the oscillation frequency was modulated. The obtained sensitivity was approximately 52.35 ㎐/degㆍs within the angular rate range of 0~1000 deg/s. The performances of devices with three IDT structures for two kinds of piezoelectric substrates were characterized. Good thermal stability was also observed during the evaluation process.
김동건(Dong Kun Kim),이정복(Jung Bock Lee),오기근(Ki Keun Oh) 대한피부과학회 1985 대한피부과학회지 Vol.23 No.1
A retrospective study was made of the previous medical records of 32 infants with congenital syphilis borne from mothers with untreated syphilis at Severence Hospital, Yonsei University College of Medicine during the years 1,972 through 19g3, These infants had a VDRL titer higher than 1: 8 with reactive FTA-ABS test and were also subjected to radiologic examinations. Radiologic changes and clinical features were analyzed, The following results were obtained: Of the total of 32 infants with congenital syphilis under 5 months of age, those under 1 month of age, were the most common group numbering a total of twelve. Of 32 infants with congenital syphilis, twenty-nine(91%) showed skeletal changes upon radiologic examination, Among them the different sites of bone involvernent revealed that the femur(92%) was the most commonly affected bone, followed by the humerus(88%), tibia(81%,), fibula(80%), ulna(72%), radius (68%). Among the same 29 infants a study of the presence of various abnormal bone changes showed that periostitis was the most common, being involved in 83%, the others being metaphysitis and periostitis(72%), metaphysitis(66%). 3. Among the clinicaI features presented in the 32 infants with congenital syphilis, hepatomegaly was the most common(63%,), followed by erythema with desquamation(47%), pneumonia(38%), maulopapules(34%).