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Dual water coil 데시칸트제습 시스템 및 천장복사냉방 패널의 디커플링 시스템 제안
장휴산(Hyu San Jang),유석(Shuo Liu),설염(Yan Xue),이태하(Tae Ha Leigh),정창호(Chang Ho Jeong),권영상(Young Sang Kwon),여명석(Myoung Souk Yeo) 대한설비공학회 2021 대한설비공학회 학술발표대회논문집 Vol.2021 No.6
The purpose of this paper is to introduce a method of capacity estimation and control of decoupling systems for combination systems of a desiccant system and radiant ceiling cooling panels. EnergyPlus 9.4 was used as the simulation tool and the analysis target and analysis period were set as the living room of the apartment from August 1 to August 31. As a result of applying decoupling system operation using desiccant system and radiant ceiling panel, the decoupling operation was achieved by maintaining the supply air temperature of almost 26℃. In addition, the condensation generation of each cooling system could be prevented through high temperature cooling operation, as well as satisfying the room comfort levels, especially PMVs were mostly between -0.2 and 0. In the future, we also plan to model heat source systems (primary systems) and try to reduce energy by combining them with renewable energy.
진행된 간세포암에서의 간문맥 혈전증에 대한 방사선치료 효과
김정훈(Jung Hoon Kim),최은경(Eun Kyung Choi),안승도(Seung Do Ahn),이상욱(Sang-wook Lee),신성수(Seong Soo Shin),최원식(Wonsik Cho),임영석(Young-suk Lim),김강모(Kang Mo Kim),서동진(Dong Jin Suh),정영화(Young Wha Chung),이영상(Young San 대한방사선종양학회 2007 Radiation Oncology Journal Vol.25 No.3
목 적: 치료방법이 정립되지 않은 진행된 간세포암에서의 간문맥 혈전증에 대한 방사선치료의 효과와 간독성을 측 정함으로써 향후 방사선치료의 효용성에 대하여 알아보고자 한다. 대상 및 방법: 2000년 5월부터 2005년 12월까지 서울아산병원에서 원발성 간세포암으로 진단받은 환자 중 간문맥혈전증이 동반된 70명의 환자를 대상으로 후향적 분석을 하였다. 대상 환자들의 나이는 24∼74세(중앙값 51세)였으며, 대부분이 Child-Pugh’s class A, B였고 Eastern Cooperative Oncology Group (ECOG) 2 이하였다. 방사선치료는 3차원입체조형치료를 시행하였으며, 1회 선량은 2∼4 Gy로 총방사선량은 40∼60 Gy (중앙값 48 Gy)였으며, 생물학적 유효선량(biologic effective dose)은 31.3∼78.0 Gy10 (중앙값 61.6 Gy10)였다. 결 과: 치료 반응평가는 치료 전과 치료 종료 후 최소 1개월 이상 경과 후 컴퓨터 단층촬영(CT)을 시행하여 평가하였으며, 대상 환자들의 추적관찰기간은 2∼24개월(중앙값 9개월)이었다. 방사선치료 후 완전반응인 경우가 2명(2.9%), 부분반응 31명(44.3%), 무반응 35명(50.0%), 진행병변 2명(2.9%)이었다. 1년 무진행 생존율(progression-free survival)은 60%였으며, 중앙 무진행 생존기간은 17개월이었다. 전체 환자의 중앙 생존기간(overall survival)은 11개월이었으며, 치료반응 유무에 따라 부분 반응 이상을 보인 환자군의 중앙 생존기간은 15개월, 무반 응이거나 진행병변을 보인 환자군은 8개월로 통계학적 차이를 보였다(p=0.032). 치료 중 일시적인 간기능 저하가 4명(5.7%), 방사선 간염은 1명(1.4%)에서 발생하였다. 결 론: 진행된 간세포암에서의 간문맥 혈전에 대해 방사선치료를 시행한 경우 비교적 유용하며 안전한 치료법이며,앞으로의 연구에서는 방사선치료가 생존율을 향상시킬 수 있는지 여부와 적절한 방사선량을 결정하기 위한 연구가 필요할 것으로 생각된다. Purpose: To determine the role of radiotherapy for the treatment of portal vein thrombosis (PVT) from hepatocellular carcinoma (HCC). Material and Methods: A retrospective analysis was performed on 70 patients that had been diagnosed with HCC and were treated with three-dimensional conformal radiotherapy (3D-CRT) for the PVT. The radiation dose ranged from 40 Gy to 60 Gy (median dose: 48 Gy) and the biological effective dose (BED) ranged from 31.3 Gy to 78.0 Gy10 (median dose: 61.6 Gy10). Response was determined by measuring the extent of the PVT on a CT image at 0, 1 and 3 months after completion of the radiotherapy. The median follow-up period was 9 months. Results: The response rate was 47.1% (33 patients), with two patients (2.9%) showing a complete response, 31 patients (44.3%) showing a partial response, and 35 patients (50%) showing stable disease or no response. The 1-year progression-free survival rate was 60%, and the median progression-free survival time was 17 months. The median overall survival time was 11 months, the median survival time in the responders was 15 months and in the nonresponders was 8 months (p=0.032). Four patients (5.7%) had transient liver function impairment during treatment. Radiation induced liver disease (RILD) was observed in only one patient (1.4%). Conclusion: Three-dimensional conformal radiotherapy for the treatment of PVT from advanced HCC was a relatively effective and safe method.