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양측 유방암 방사선치료 시 토모테라피와의 비교를 통한 Halcyon VMAT 치료계획의 유용성 평가
임준택,박주영,박수연,전성진,박태양,황다진,LIM JUN TAEK,PARK JU YOUNG,PARK SU YEON,JEON SEONG JIN,PARK TAE YANG,HWANG DA JIN 대한방사선치료학회 2022 대한방사선치료학회지 Vol.34 No.-
Purpose: To evaluate usefulness of Tomotherapy and Halcyon VMAT treatment in radiation therapy for bi-breast cancer Materials and Methods: For 10 patients with bi-breast cancer, volumetric modulated arc therapy(VMAT) treatment plan was established using helical Tomotherapy(Accuray. USA) with field width of 5.0-cm and pitch of 0.287, and Halcyon(Varian Medical System, Palo Alto, CA, Version 3.0 USA) of 6arc and 8arc. Prescribed dose was 42.4 Gy/16, and V <sub>40.3Gy</sub> of Planning Target Volume(PTV) was 90%. The quality of plan was evaluated by comparing the dose to tumor and normal organs, and the efficiency was evaluated by comparing total MU and beam on time. Results: About three treatment plans(Tomotherapy, Halcyon 6Arc VMAT, Halcyon 8Arc VMAT) , the mean homogeneity index(H.I) of PTV were 1.07, 1.10, 1.11, and the mean conformity index(C.I) of PTV were 1.21, 1.16, 1.17, respectively. The average value of the dose assessment item for a normal organ is V <sub>5Gy</sub>(%) of both lung was 36.3, 31.2, 29.7, and V <sub>15Gy</sub>(%) were 18.6, 15.5, 14.6, respectively. The mean heart dose(Gy) were 4.17, 2.69, 2.51. Total MU were (7498.6, 2494.2, 2471.5), and beam on time(sec) were 462.5, 195.4, 198.0. Conclusion: Halcyon VMAT showed similar quality of treatment plan compared to helical Tomotherapy, while also protecting normal organs. In addition, the efficiency of radiotherapy increased due to a decrease in Beam On Time and MU.
임준택,권병선,정동수,계봉명,현규환,신동영,Lim, June-Taeg,Kwon, Byung-Sun,Jung, Dong-Soo,Kae, Bong-Myung,Hyun, Kyu-Hwan,Shin, Dong-Young 한국작물학회 2006 Korean journal of crop science Vol.51 No.suppl1
This study was conducted to select the most suitable dye bath soil of mat rush for good quality. Dry stem weight ranged from 102.5 to 107.0 g, dry stem ratio ranged from 34 to 36%, color of stem ranged from soft gray to heavy gray, degree of softness ranged from high to low and degree of floating ranged from extremely high to low. All the good quality components, such as dry stem weight, dry stem ratio, color of stem, degree of softness and degree of floating showed large variations. Hadong white ceramic soil, the superior dye bath soil of mat rush, showed relatively superior values for all the good quality components with 102.5 g in light dry stem weight, 34% in high dry stem ratio, good color of soft gray in color stem, high in degree of softness and extremely high id degree of floating. The results indicate that dye bath soils shows different adaptabilities to a particular dye bath and Hadong white ceramic soil seems to be the most suitable dye bath soil of mat rush for good quality.
다양한 변형률 에너지 함수를 사용한 전방 및 후방 십자인대의 모델링에 관한 연구
임준택(Lim Jun-taek),최덕기(Choi Deok-kee),김영은(Kim young-en) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
The mechanical study on the anterior and posterior cruciate ligament(ACL, PCL) is of importance because the recent increase of outdoor and indoor activities is directly related to causing sport injuries on the knee joints. Constitutive models for many biological tissues have been known as hyperelasticitic models. The elastic behavior of ACL and PCL may be described by the free energy function which accounts for the matrix and the collagen fibers. This paper addresses a comparison of different types of the free energy function to the existing results.