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논문 기본 정보

자료유형
학술저널
저자정보
Woo Sang Ahn (University of Ulsan) Wonsik Choi (University of Ulsan) Jungwon Kwak (University of Ulsan) Young Ran Ka (Jefferson State Community College) Cheol-soo Park (Hallym Polytechnic University) Seong Soo Shin (University of Ulsan)
저널정보
한국자기학회 Journal of Magnetics Journal of Magnetics Vol.22 No.4
발행연도
2017.12
수록면
709 - 714 (6page)
DOI
10.4283/JMAG.2017.22.4.709

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The purpose of this study is to propose the use of a beam spoiler for improving the build-up region of photon beam by using external magnetic field with a low strength of 0.5 T (Tesla) outside the human body. A homemade magnet device which can apply a transverse magnetic field to photon beam was developed. The effect of dose enhancement on build-up region was investigated by the beam spoiler-to-magnet distance (BMD), the magnet-to-magnet distance (MMD), and the magnet-to-surface distance (MSD). Build-up regions of 6 MV photon beam with and without the magnetic field were measured for the field size to 5 × 5 ㎠. When applying the low magnetic field with MMD of 10 cm, D<SUB>0mm</SUB>, D<SUB>2mm</SUB>, D<SUB>5mm</SUB> and D<SUB>10mm</SUB> at BSD of 13 cm and MSD of 5 cm were increased by approximately 3.2%, 3.9%, 1.7% and 0.4%, respectively, compared to the build-up of the existing 6 MV photon beam without the magnetic field. The dose reduction was 5.1% compared to skin dose for 4 MV photon beam without the magnetic field. It is expected that use of a beam spoiler in the magnet device designed in this study could provide improved dose distributions in build-up regions while maintain similar surface dose to the existing 6 MV photon beam without the magnetic field.

목차

1. Introduction
2. Materials and Methods
3. Results and Discussion
4. Conclusion
References

참고문헌 (16)

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