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NTIS 바로가기대한방사선치료학회지 = The Journal of Korean Society for Radiation Therapy, v.28 no.2, 2016년, pp.161 - 169
동갑상 (가천대길병원방사선종양학과) , 백창욱 (가천대길병원방사선종양학과) , 정윤정 (가천대길병원방사선종양학과) , 배재범 (가천대길병원방사선종양학과) , 최영은 (가천대길병원방사선종양학과) , 성기훈 (가천대길병원방사선종양학과)
Purpose : To quantify the inter-fractional variation in prostate displacement and their dosimetric effects for prostate cancer treatment. Materials and Methods : A total of 176 daily cone-beam CT (CBCT) sets acquired for 6 prostate cancer patients treated with volumetric-modulated arc therapy (VMAT)...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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전립선은 어디에 위치하는가? | 전립선은 방광과 직장사이에 위치하는 연조직(soft tissue) 장기로서, 크기 변화와 모양 변형이 쉽게 나타난다. 금표 식자를 이용한 위치 맞춤을 이용할 경우, 금표식자의 위치를 3차원적으로 파악하여 환자의 위치를 조정할 수 있으나 전립선의 크기 변화나 모양변형에 따른 선량분포의 변화는 고려할 수 없다. | |
전립선암 방사선 치료시 치료선량 증가시 주의해야할 점은 무엇인가? | 전립선암의 방사선 치료시 치료선량이 증가시키면 국소제어율을 높일 수 있다.13) 그러나, 높은 치료선량을 처방할때 골반내장기들의 제한선량(tolerance dose)을 고려해야한다.14-16) 골반내장기들의 방사선 독성(radiation toxicity)를 줄이면서 국소제어율을 높이기 위해서는 정밀도가 높은 치료기법, 즉 삼차원입체조형방사선치료(3-dimensional conformal radiation therapy; 3D-CRT)나 세기 조절 방사선치료(intensity modulated radiation therapy; IMRT)를 사용하여 고선량을 표적체적에 집중시켜야 한다. | |
골반내장기들에 대한 방사선독성을 줄이기위한 방법은? | 골반내장기들에 대한 방사선독성을 줄이기 또하나의 방법은 내부장기의 위치와 체적을 조절하는 것이다. 방광의 체적을 최대한으로 늘리면, 조사영역에 포함되는 방광의 체적을 줄일 수 있으며, 소장을 골반 위로 밀어 올려 조사영역에서 배제할 수 있다. |
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