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최원진 한국간담췌외과학회 2000 한국간담췌외과학회지 Vol.4 No.1
Background : The management of giant hemangioma of the liver is still controversial. This study was to investigated the role of sugical treatment. Methods : Nine patients with giant hemangioma of the liver was treated surgically from Jan, 1990-Dec.1998. The authors reviewed the results of surgical treatment retrospectively. Results : The 9 patients had mean age fo 47, with a male to female ratio 1:3.5. The most common symptoms were discomfort of pain on the right upper quadrant and epigastric area. But 2 patients was asymptomatic on the time of diagnosis. On physical examination 3 patients had right subcostal tenderness, epigastric tenderness, palm-sized palpable mass each other with no specific findings on other 6 patients. Preoperatively 4 patients were diagnosised as ghemangioma but 5 patients as hepatic tumors. Diagnostic biopsy was performed on 2 cases with one significant hemorrhage in laparoscopic biopsy. The lesions were located at either of left or right lobe of liver but slightly more at left. The mean size of tumor was 9.5cm ranging from 5 to 20cm. Operative methods were liver resections including lesions in eight cases except improperly diagnosed case as a cystic liver disease. There was no major complications. Conclusion : With advance of operative facility, liver resection can be the surgical treatment of choice for giant hepatic hemangioma without significant morbidity. Background : The management of giant hemangioma of the liver is still controversial. This study was to investigated the role of sugical treatment. Methods : Nine patients with giant hemangioma of the liver was treated surgically from Jan, 1990-Dec.1998. The authors reviewed the results of surgical treatment retrospectively. Results : The 9 patients had mean age fo 47, with a male to female ratio 1:3.5. The most common symptoms were discomfort of pain on the right upper quadrant and epigastric area. But 2 patients was asymptomatic on the time of diagnosis. On physical examination 3 patients had right subcostal tenderness, epigastric tenderness, palm-sized palpable mass each other with no specific findings on other 6 patients. Preoperatively 4 patients were diagnosised as ghemangioma but 5 patients as hepatic tumors. Diagnostic biopsy was performed on 2 cases with one significant hemorrhage in laparoscopic biopsy. The lesions were located at either of left or right lobe of liver but slightly more at left. The mean size of tumor was 9.5cm ranging from 5 to 20cm. Operative methods were liver resections including lesions in eight cases except improperly diagnosed case as a cystic liver disease. There was no major complications. Conclusion : With advance of operative facility, liver resection can be the surgical treatment of choice for giant hepatic hemangioma without significant morbidity.
최원진,전승환 한국항해항만학회 2023 한국항해항만학회 학술대회논문집 Vol.2023 No.1
이 연구에서는 선박이 군집을 이뤄 항해하는 방법으로, 추종 선박이 리더 선박의 궤적을 따라 항해하는 추종 알고리즘을 구현하고, 성능 검증을 위해 소형 RC 모형 보트를 사용하여 해상 실험을 수행하였다. 이 알고리즘은 추종 선박이 리더 선박의 궤적을 추종점으로 저장하고, 추종점까지의 목표 침로를 계산하여 추종하는 방법이다. 목표 침로는 시선각 유도법칙을 통해 계산하였으며, 목표 침로를 추종하기 위해 PD 제어를 적용한 침로 제어기를 구현하였다. 또한, 전방 선박과의 충돌을 방지하기 위해 전방 선박과의 거리에 따라 속력을 제어하는 알고리즘을 구현하였다. 구현된 알고리즘을 검증하기 위해 해상 실험을 진행하였으며, 결과를 분석하였다.
최원진,문성배 한국항해항만학회 2023 한국항해항만학회 학술대회논문집 Vol.2023 No.1
자율운항선박 지원 서비스는 자율운항선박이 항만 내에서 안전하게 항해하고, 입/출항 및 화물 적/양하를 효율적으로 진행하는 것을 지원하기 위해 개발 중인 6종 서비스를 의미한다. 개발된 서비스의 성능을 검증하기 위해 육상 시범운영 인프라인 자율운항선박 기술연구센터를 구축하였으며, 성능검증 시나리오를 개발하였다. 성능검증 시나리오는 개발된 서비스가 실제 운용 환경에서 올바르게 동작하는지 확인하는 데 중점을 두고 있다. 성능검증은 실제 서비스 사용자를 중심으로 하는 사용자 기반 방식으로 진행된다. 실제 선박에서의 서비스 성능을 검증하기 위해 실습선을 이용한 실선박 테스트를 수행하였다.
최원진,이기남,강은주,이혁 대한영상의학회 2016 Korean Journal of Radiology Vol.17 No.1
Radiologic findings of Middle East respiratory syndrome (MERS), a novel coronavirus infection, have been rarely reported. We report a 30-year-old male presented with fever, abdominal pain, and diarrhea, who was diagnosed with MERS. A chest computed tomographic scan revealed rapidly developed multifocal nodular consolidations with ground-glass opacity halo and mixed consolidation, mainly in the dependent and peripheral areas. After treatment, follow-up imaging showed that these abnormalities markedly decreased but fibrotic changes developed.