| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| 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.
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