Effect of Low Magnetic Field on Dose Distribution in the SABR Plans for Liver Cancer

Progress in Medical Physics 2018년 29권 2호 p.47 ~ p.52

손재만(Son Jae-Man) - Seoul National University Hospital Department of Radiation Oncology
전민수(Chun Min-Soo) - Seoul National University Hospital Department of Radiation Oncology
안현준(An Hyun-Joon) - Seoul National University Hospital Department of Radiation Oncology
강성희(Kang Seong-Hee) - Seoul National University Bundang Hospital Department of Radiation Oncology
지의규(Chie Eui-Kyu) - Seoul National University Hospital Department of Radiation Oncology
윤정민(Yoon Jeong-Min) - Seoul National University Hospital Department of Radiation Oncology
최창헌(Choi Chang-Heon) - Seoul National University Hospital Department of Radiation Oncology
박종민(Park Jong-Min) - Seoul National University Hospital Department of Radiation Oncology
김정인(Kim Jung-In) - Seoul National University Hospital Department of Radiation Oncology

Abstract

To investigate the effect of low magnetic field on dose distribution in SABR plans for liver cancer, we calculated and evaluated the dose distribution to each organ with and without magnetic fields. Ten patients received a 50 Gy dose in five fractions using the ViewRay® treatment planning system. For planning target volume (PTV), the results were analyzed in the point minimum (Dmin), maximum (Dmax), mean dose (Dmean) and volume receiving at least 90% (V90%), 95% (V95%), and 100% (V100%) of the prescription dose, respectively. For organs at risk (OARs), the duodenum and stomach were analyzed with D0.5cc and D2cc, and the remained liver except for PTV was analyzed with Dmean, Dmax, and Dmin. Both inner and outer shells were analyzed with the point Dmin, Dmax, and Dmean, respectively. For PTV, the maximum change in volume due to the presence or absence of the low magnetic field showed a percentage difference of up to 0.67±0.60%. In OAR analysis, there is no significant difference for the magnetic field. In both shell structure analyses, although there are no major changes in dose distribution, the largest value of deviation for Dmax in the outer shell is 2.12±2.67 Gy. The effect of low magnetic field on dose distribution by a Co-60 beam was not significantly observed within the body, but the dose deposition was only appreciable outside the body.

키워드

Liver cancer, SABR, MR-IGRT, Magnetic field
원문 및 링크아웃 정보
등재저널 정보
학술진흥재단(KCI) KoreaMed 
주제코드
주제명(Target field)
연구대상(Population)
연구참여(Sample size)
대상성별(Gender)
질병특성(Condition Category)
연구환경(Setting)
연구설계(Study Design)
연구기간(Period)
중재방법(Intervention Type)
중재명칭(Intervention Name)
키워드(Keyword)
유효성결과(Recomendation)
The effect of the low magnetic field on dose distribution was not significantly observed PTV and OARs for SABR plans with liver cancer.
연구비지원(Fund Source)
근거수준평가(Evidence Hierarchy)
출판년도(Year)
참여저자수(Authors)
대표저자
KCD코드
ICD 03
건강보험코드