부정형 조사면에서의 TLD를 이용한 방사선 흡수선량 측정

• 영문명: Dosimetry of Irregular field Using Thermoluminescence Dosimetry
• 발행기관: 대한방사선종양학회
• 저자명: 이종영(Jong Young Lee) 박경란(Kyung Ran Park) 김계준(Kye Jun Kim)
• 간행물 정보: 『대한방사선종양학회지』제12권 제2호, 263~267쪽, 전체 5쪽
• 주제분류: 의약학 > 종양학
• 파일형태: PDF
• 발행일자: 1994.08.30

영문 초록

In clinical radiotherapy, the use of wide and irregular field techniques frequently results in considerable tumor dose inhomogeneity because of, the variation in physical characteristics of irradiated volumes. This report describes an analysis of the dosimetry of the irregular fields such as radaition fields for Hodgkin's disease(mantle field), esophageal cancer, and lung cancer when a 6MV and a 15MV linear accelerators are utilized. Doses were measured in a Rando phantom using methods of thermoluminescence dosimetry(TLD) and were calculated by radiotherapy planning computer system with the Clarkson's method for calculation of a irregular field. A dose variation of 5-22%, 6-9%, 6-14% were found in the mantle field, esophageal cancer field, lung cancer field respectively. Higher doses occurred in the superior portion of the irregular field. The sites of maximum dose variation were the supraclavicular and the upper spinal cord region. To adjust for these substantial differences, a compensator or a shrinking field technique should be adopted.

키워드

Irregular field Dosimetry TLD