6MV 광자선에서 공동에 의한 조직 선량변동에 관한 연구

• 영문명: The Study of Tissue Dose Perturbation by Air Cavity with 6MV Photon Beam
• 발행기관: 대한방사선종양학회
• 저자명: 신병철(Byung Chul Shin) 유명진(Myung Jin Yoo) 문창우(Chang Woo Moon) 정태식(Tae Sig Jeung) 염하용(Ha Yong Yum)
• 간행물 정보: 『대한방사선종양학회지』제13권 제4호, 397~402쪽, 전체 6쪽
• 주제분류: 의약학 > 종양학
• 파일형태: PDF
• 발행일자: 1995.12.30

영문 초록

Purpose : To determine the perturbation effect in the tissue downstream from surface layers of lesions located in the air/tumor-tissue interface of larynx using 6MV photon beam. Materials and Methods : Thermoluminescent dosimeters(TLDs). were embedded at 3 measurement location in slab no.7 of a humanoid phantom and exposed to forward and backward direction using various field sizes(4X4cm²-15X15cm²). Results : At the air/tissue interface forward dose perturbation factor(FDPF) is about 1.085 with 4X4cm², 1.05 with 7X7cm², 1.048 with 10X10cm² and 0.99 with 4X4cm², 0.981 with 7X7cm², 0.956 with 10X10cm² and 0.97 with 15X15cm². Conclusion : FDPF is greater as field size is smaller. And FDPF is smaller as the distance is further from the air/tissue interface.

키워드

Dose perturbation Air/tissue interface Larynx