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NTIS 바로가기방사선기술과학 = Journal of radiological science and technology, v.42 no.2, 2019년, pp.137 - 143
함일식 (대구가톨릭대학교 방사선학과) , 조평곤 (대구가톨릭대학교 방사선학과) , 정강교 (안동병원 영상의학과)
The aim of this study was analyzed the setup error of breast cancer patients in intensity modulated radiation therapy(IMRT) with deep inspiration breath holding(DIBH) and was analyzed the dose distribution due to setup error. A total of 45 breast cancer cases were performed a retrospective clinical ...
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핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
유방암 세기변조방사선치료의 적용이 확대되는 이유는? | 이러한 부작용을 줄이기 위해 유방암 세기변조방사선치료(Intensity modulated radiation therapy; IMRT)와 Deep inspiration breath holding(DIBH)의 적용이 확대되고 있는 추세이다. 먼저 IMRT 시 접선조사보다 선량의 동질성(Homogeneity)과 조형성(Conformity)이 뛰어나며 주변장기(Organ at risk; OARs)에 들어가는 불필요한 선량을 줄일 수 있다. 두 번째로 자유호흡(Free breathing; FB) 대신에 DIBH를 적용하게 되면 좌측 유방암치료 시 폐와 심장에 들어가는 선량을 현저히 줄일 수 있고, 호흡에 의한 치료부위의 움직임도 줄일 수 있다. | |
불필요한 선량의 증가로 발생할 수 있는 질병은? | 일반적으로 유방암 방사선치료에는 접선조사(Tangential field technique)가 많이 이루어지고 있으나 피부 및 심장, 폐 등에 불필요한 선량의 증가로 인한 피부염 등의 급성장해는 물론 치료 종료 후에 폐렴이나 심장 질환 등의 합병증을 일으킬 수 있다. 이러한 부작용을 줄이기 위해 유방암 세기변조방사선치료(Intensity modulated radiation therapy; IMRT)와 Deep inspiration breath holding(DIBH)의 적용이 확대되고 있는 추세이다. | |
무작위오차(Random error; σ)란? | 계통오차는 집단 평균의 표준편차이며 계획된 환자위치와 치료 된 환자위치의 차이라고 할 수 있다. 무작위오차는 모든 환자의 표준편차의 RMS이다. 여기서 계통오차는 선량분포의 누적부분을 이동시키는 결과를 초래하고, 무작위오차는 선량분포를 희미하게 하게 한다. |
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