Development water-equivalent ionization chambers

2016 Fiscal Year Final Research Report

• Project/Area Number: 26461903
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Radiation science
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: Morishita Yuichiro 国立研究開発法人産業技術総合研究所, 分析計測標準研究部門, 主任研究員 (20425747)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 水吸収線量 / 固体電離箱 / 水等価

Outline of Final Research Achievements

Water-absorbed dose delivered to a patient in cancer therapy is usually measured using an air-filled ionization chamber in hospitals. However it is difficult with this method to determine the precise water-absorbed dose due to physical differences between air and water. In this study, we experimentally searched for a material which can replace the air in the ionization chamber, and we made a Farmer and a parallel type ionization chambers using possible materials. However the ionization chambers did not show the signals under the gamma-rays irradiation. Now we are rebuilding the ionization chamber to increase the electric field to collect the ionized charges.

Free Research Field

放射線量計測