복부대동맥과 하대정맥 주변의 작은 임파절병증에 대한 CT 유도하 수정된 공축법을 이용한 경피적 생검술

송치성 대한영상의학회 2006 대한영상의학회지 Vol.54 No.3

소아 원발성 폐렴의 방사선학적 소견

송치성 대한영상의학회 1991 대한영상의학회지 Vol.27 No.1

It is not always easy to detect and interpret radiologic findings of pediatric pneumonia. Authors retrospectivel analysed radiologic findings of 102 cases of pediatric primary pneumonia treated at Yeong-Deung-Po City Hospital bet ween 1988 and 1990 to understand the past trend of radiologic pattern and to attain helpful information in diagnosing pediatric pneumonia hereafter. Results were as follows. 1.Positive radiologic findings were noted in 85 cases(84%), but 17 cases(16%) showed indefinite lesion. 2.The cases of infantile pneumonia(under 1 year of age) were 44. The most frequent finding was bilateral peribronchial infiltration with overearation(21 cases, 48%), followed by multiple patchy atelectasis associated with the findings of bilateral peribronchial infiltration and oberaeration(nine cases, 23%), peribronchial infiltration without definite overaeration(six cases, 14%), alveolar consolidation superimposed on the peribronchial infiltration(three cases, 6%), alveolar consolidation(three cases, 6%) and bronchopneumonic pattern(two cases, 4%). 3.The cases of pre-school age(1-5 years of age) were 34. Bilateral parahilar peribronchial infiltration was the frequent finding(24 cases, 71%), followed by alveolar consolidation(six cases, 17%) and bronchopneumonic pattern(four cases, 12%) 4. The cases of school age(over 6 years of age) were seven. Six cases(85%) showed alveolar consolidation and one case(15%) showed bronchopneumonic pattern. In short, the younger the patient was, the more frequently the interstitial infiltration occurred. Furthermore, overaeration and patchy atelectasis were uique findings of infantile pneumonia. After the school age, the pattern of pneumonia become similar to that of adults.

초음파상 잘 보이지 않는 복강 내 작은 농양이나 액체 저류에 대한 수정된 Seldinger식 CT 유도 하 피부경유 배액술의 유용성

송치성 대한영상의학회 2010 대한영상의학회지 Vol.62 No.5

Purpose: To evaluate the usefulness of CT-guided percutaneous catheter drainage (PCD) using a modified version of the Seldinger technique for deep-seated, small abscesses and poorly depicted fluid collection on abdominal sonogram. Materials and Methods: Fifty-nine cases of CT-guided PCD were performed on 56 patients. Four techniques were applied to secure safe access routes, which include scan postural change, angulation of the gantry, traversal of organs, and using a dissecting needle which can push the intervening bowel. Three landmarks (depth of the front and back wall of the fluid collection and the end point of catheter advancement over the guide wire) were indicated on the drainage catheter for extracorporeal direct observation of moving distance and location of the catheter during the insertion process. The technical success rate, clinical outcome, complications, and instrumental impairments were reviewed. Results: The technical success rate was 100% (59/59), and no grave complications occurred. Four cases (7%) of crooked guide wire insertion were noted. The clinical outcome revealed a 95% (56/59) successful treatment rate and a 5% (3/59) failed treatment rate, which was caused by undissolved hematoma (1/59) and fistula (2/59). Conclusion: The results of this study suggest that CT-guided PCD using a modified version of the Seldinger technique for deep-seated, small abscesses and poorly depicted fluid collections on an abdominal sonogram is useful in terms of accuracy and safety. 목적: 복부초음파 영상에서 잘 보이지 않았던 깊은 위치의 작은 농양과 액체저류에 대해 수정된 Seldinger 방식으로 시행한 CT 유도 하 피부경유 배액술의 유용성을 알아보고자 함. 대상과 방법: 56명의 환자에서 59예의 CT 유도 하 피부경유 배액술을 시행하였다. 안전한 접근 경로를 확보하기 위해, 스캔 체위 변화, 갠트리 각도 기울임, 장기 관통 및 사이에 끼어든 장관을 밀어낼 수 있는 박리검침 사용과 같은 네 가지 기법들을 적용하였다. 삽관이 진행되는 동안에 배액관이 이동되는 거리와 위치를 몸 밖에서 직접 관찰하기 위해 세 군데의 위치표지(액체저류의 전벽과 후벽까지의 깊이, 유도철사를 타고 배액관이 진입되는 최종점)를 배액관에 표시하였다. 기술적 성공률, 임상적 결과, 합병증 및 시술도구의 손상을 알아보았다. 결과: 기술적 성공률은 100%(59/59)이었고, 심각한 합병증은 나타나지 않았다. 유도철사의 구부러짐이 4예(7%)에서 보였다. 임상적 결과는 95%(56/59)의 성공적 치료와 5%(3/59)의 치료 실패이었는데, 이 치료실패는 용해되지 않은 혈종(1/59)과 누공(2/59)에 기인하였다. 결론: 본 연구의 결과로 보아 복부초음파 영상에서 잘 보이지 않았던 깊은 위치의 작은 농양과 액체저류에 대해 수정된 Seldinger 방식으로 시행한 CT 유도 하 피부경유 배액술은 정확성과 안전성 면에서 유용하다고 생각한다.

디젤엔진 연료계통의 유동 및 압력 변동특성에 관한 이론적 연구

송치성 한국마린엔지니어링학회 1993 한국마린엔지니어링학회지 Vol.17 No.3

Combustion phenomenon in diesel engine is mainly governed by characteristics of fuel injection and fuel spray system affected by its dimensions and operating condition. Fuel supply system is consisted of fuel injection pump, high pressure pipe and injection nozzle. In order to develope the more economical diesel fuel injection system, it is in need to carryout the fairly wide range experiments, which is quite impossible. Therefore, theoretical analysis for the numberous parameters is powerful method in this case. In the present study, equations of continuity of fuel oil in fuel injection system are solved to obtain the flow and pressure variation in diesel fuel system affected by injection pump speed, plunger diameter, pipe length and nozzle opening pressure.

1 cm 이하의 폐 병변에 대한 CT 유도하 경피적 생검술: 기법, 결과, 합병증

송치성 대한영상의학회 2006 대한영상의학회지 Vol.54 No.5

디젤엔진 연료계통의 분사특성에 관한 연구

송치성 한국마린엔지니어링학회 1993 한국마린엔지니어링학회지 Vol.17 No.4

It has been a principle research topic on the diesel engine development to increase the efficiency and the performance of engine to satisfy the user's needs for high reliability and durability. However, recently with the worldwide concerns at the global climate change and environmental protection, the main target in the diesel engine research has been changed to solve the exhaust emission problem in order to satisfy the strict emission regulations. To reduce the pollutant for the diesel engine, the researchs on the combustion chamber is the most important and has to be performed first of all. The diesel fuel injection system plays major role to air-fuel mixing process and influences engine output, themal efficiency, reliability, noise, and emissions. The experimental studies were conducted by varying the various parametric conditions and the results were campared with the computation and calculated results by using the fuel injection simulation program developed during previous research. From the experiments, the matching technique of a fuel injection pump and nozzle was conducted to understand under the various parametric conditions. Also, the relations between needle lift and wave propagation characteristics in high pressure pipe were examined. The basic design data from the experimentations and computation works would be applied to actual design works of diesel fuel injection system.

고속 PIV계측에 의한 실린더 근접후류 공진 유동 가시화

송치성 한국마린엔지니어링학회 2001 한국마린엔지니어링학회지 Vol.25 No.6

Vortex lock-on or resonance behind a circular cylinder is visualized using a time-resolved PW when a single frequency oscillation is superimposed on the mean incident velocity. For vector processing, a cross-correlation algorithm in conjunction with a recursive correlation and interrogation window shifting techniques is used. Measurements are made of the Karmas and streamwise vertices in the wake-transition regime at Reynolds lumber 360. When lock-on occurs, the vortex shedding frequency is found to be half the oscillation frequency as expected from previous experiments. At the lock-on state, the Karman vortices are observed to be more disordered by the increased strength and spanwise wavelength of the streamwiee vortices, which lead? to a strong three-dimensional motion.

원자력산업기기 연구센터

송치성,김재형,손상호,Song, Chi-Seong,Kim, Jae-Hyeong,Son, Sang-Ho 대한기계학회 2011 기계저널 Vol.51 No.7

이 글에서는 한국기계연구원 원자력산업기기연구센터에서 수행하고 있는 원전기기 성능시험을 위한 설비 및 기술개발과 원전기기의 기기검증(Equipment Qualification) 등의 업무에 대해 소개하고자 한다.

원통형 용기에 담긴 탈지분유 용액의 진공동결건조: 실험결과와 해석결과의 비교연구

송치성,남진현,김찬중,노승탁 대한기계학회 2002 大韓機械學會論文集B Vol.26 No.2

원통형 용기에 담긴 탈지분유 용액의 진공동결건초 : 실험결과와 해석결과의 비교연구

송치성,남진현,김찬중,노승탁,Song, Chi-Seong,Nam, Jin-Hyeon,Kim, Chan-Jung,No, Seung-Tak 대한기계학회 2002 大韓機械學會論文集B Vol.26 No.2

A vacuum freeze drying experiment of skim milk solution in a cylindrical container is conducted to investigate the multi-dimensional drying characteristics of the process during the primary drying stage. Temperature histories at several positions are measured under the same process condition that is carefully controlled. Then the measured temperature histories at different positions are combined to produce instantaneous temperature distribution fields inside the cylindrical container. Along with the temperature measurement, the mass reduction history of the skim milk solution is also measured. From the measured temperature distribution curved configurations of sublimation interfaces and 2-dimensional heat transfer is inferred. The freeze drying under the present experimental setup is simulated with a calculation program that is based on a finite volume method with a moving grid system. Good agreements between the numerical and experimental results are observed. The present experimental results and the numerical approaches can be useful information in developing the analysis tools for practical vacuum freeze drying processes.