Beam range estimation by measuring bremsstrahlung

被引：45

作者：

Yamaguchi, Mitsutaka ^{[1
]}

Torikai, Kota ^{[2
]}

Kawachi, Naoki ^{[3
]}

Shimada, Hirofumi ^{[2
]}

Satoh, Takahiro ^{[1
]}

Nagao, Yuto ^{[1
]}

Fujimaki, Shu ^{[3
]}

Kokubun, Motohide ^{[4
,5
]}

Watanabe, Shin ^{[4
,6
]}

Takahashi, Tadayuki ^{[4
,6
]}

Arakawa, Kazuo ^{[1
,2
]}

Kamiya, Tomihiro ^{[1
]}

Nakano, Takashi ^{[2
,7
]}

机构：

[1] Japan Atom Energy Agcy, Takasaki Adv Radiat Res Inst, Takasaki, Gunma 3701292, Japan

[2] Gunma Univ, Gunma Univ Heavy Ion Med Ctr, Maebashi, Gunma 3718511, Japan

[3] JAEA, Quantum Beam Sci Directorate, Takasaki, Gunma 3701292, Japan

[4] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Chuo Ku, Sagamihara, Kanagawa 2525210, Japan

[5] Grad Univ Adv Studies, Dept Space & Astronaut Sci, Miura, Kanagawa 2400193, Japan

[6] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

[7] Gunma Univ, Grad Sch Med, Maebashi, Gunma 3718511, Japan

来源：

PHYSICS IN MEDICINE AND BIOLOGY | 2012年 / 57卷 / 10期

关键词：

TUMOR-THERAPY; PROTON; WASHOUT; SYSTEM;

D O I：

10.1088/0031-9155/57/10/2843

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

We describe a new method for estimating the beam range in heavy-ion radiation therapy by measuring the ion beam bremsstrahlung. We experimentally confirm that the secondary electron bremsstrahlung process provides the dominant bremsstrahlung contribution. A Monte Carlo simulation shows that the number of background photons from annihilation gamma rays is about 1% of the bremsstrahlung strength in the low-energy region used in our estimation (63-68 keV). Agreement between the experimental results and the theoretical prediction for the characteristic shape of the bremsstrahlung spectrum validates the effectiveness of our new method in estimating the ion beam range.

引用

页码：2843 / 2856

页数：14

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