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전석봉(Jeon, Seok-Bong),오영태 대한교통학회 2007 대한교통학회 학술대회지 Vol.55 No.-
신호교차로의 특성상 시간할당을 하면 현시수가 증가하고, 출발지연, 황색시간이 증가하게 되어 주기가 길어지고 교차로의 효율이 감소하기 때문에 현시수가 될 수록 적은 것이 좋다. 이러한 이유로 좌회전 운영 방식 중 좌회전 교통수요와 대향직진 교통수요가 적은 교차로에서는 현시수가 적어 교차로 운영이 효율적이고, 교통처리능력도 뛰어난 비보호좌회전 운영의 활성화가 필요하다. 하지만 비보호좌회전 운영의 활성화를 위해서는 비보호좌회전이 허용되는 신호교차로에서의 비보호좌회전 용량과 좌회전 보정계수 등 교통운영의 정확한 분석이 선행되어야 하나 우리나라에서는 비보호좌회전에 관해 학문적인 연구가 미흡한 실정이다.
원발성 중추신경계 림프종의 치료 성적에 대한 다기관 후향적 분석
문준호 ( Joon Ho Moon ),김동환 ( Dong hwan Kim ),안병민 ( Byung Min Ahn ),김시내 ( Shi Nae Kim ),전석봉 ( Seok Bong Jeon ),백진호 ( Jin Ho Baek ),김종광 ( Jong Gwang Kim ),손상균 ( Sang Kyun Sohn ),이규보 ( Kyu Bo Lee ),황정현 ( J 대한내과학회 2006 대한내과학회지 Vol.71 No.6
Background: A primary central nervous system lymphoma (PCNSL) is a rare neoplasm with a poor prognosis. The treatment of PCNSL involves a combination of chemotherapy, intrathecal chemotherapy and radiotherapy. This study retrospectively evaluated the treatment outcomes and prognostic factors of Korean patients with PCNSL. Methods: Between 1995 and 2003, 58 patients diagnosed with PCNSL from the multi-center hospitals were enrol1ed in this study. Among 56 patients who had received treatment, 16 patients were treated with radiotherapy alone, while 40 patients were treated with combined chemotherapy (CHOP; 9 cases, high-dose methotrexate; 31 cases) and radiotherapy. Results: The median age of the patients was 58 years (range, 19-76). A diffuse large B-cell lymphoma was diagnosed in 56 cases (96.6%), while a peripheral T-cell lymphoma was diagnosed in 2 cases. Of the 47 patients who could be assessed for their response after treatment, a CR and PR was observed in 32 (68%) and 11 patients (23%), respectively, giving an overall response rate of 91% (95% CI, 82~100%). The estimated 3-year overall survival rate for all the patients was 67±7.9% and the 3-year disease free survival rate was 53±8.3%. The overall survival of the high-dose methotrexate group was superior to that of the CHOP group (77±10%) versus 47±19%, p=0.05). Leukoencephalopathy was observed as a late complication in 9 patients (21%). No significant prognostic factors affecting survival were found by univariate analysis. Conclusions: Approximately half of the patients could have long-term survival after treatment in this study. High-dose methotrexate containing chemotherapy followed by radiotherapy was found to be an effective treatment. (Korean J Med 71:65i4-661, 2000)