Mentle Field에서 Lung Block의 선량분포 고려

• 영문명: Dosimetric Consideration of the Lung Block in the Mantle Field
• 발행기관: 대한방사선종양학회
• 저자명: 유명진(Myung Jin Yoo) 신병철(Byung Chul Sin) 문창우(Chang Woo Moon) 정태식(Tae Sig Jeung) 염하용(Ha Yong Yum)
• 간행물 정보: 『대한방사선종양학회지』제13권 제2호, 199~203쪽, 전체 5쪽
• 주제분류: 의약학 > 종양학
• 파일형태: PDF
• 발행일자: 1995.06.30

영문 초록

Purpose : To evaluate the dose under lung block as a function of depth and the effectiveness of a block as a function of block width. Materials and Methods : Field size of mantle field was 22.8x32.4cm². Dose distribution of the mantle field was measured with two dimensional water phantom system. To analyze the effectiveness of the lung block, central axis plane, 5cm off-axis plane, and 10cm off-axis plane were studied. Results : The dose under the lung block was recorded with maximum at the depth between 5cm and 10cm. In the central axis plane, dosimetric block width was 10-15% less than physical block width. In the 5cm off-axis plane, dosimetric block width was 4-9% less than physical block width. In the 10cm off-axis plane, dosimetric block width was 2% less than physical block width. Conclusion : Depth dependence of the dose under the lung block was founded. Also, block width dependence of the lung block was founded. To induce the accurate relation between the physical block width and the "effective" block width, it needs more detailed understanding of the variables involved.

키워드

Mantle field Lung block Physical block width Dosimetric block width "Effective" block width