Develo pments of the target cooling and dosimetry systems for the use of the accelerator boron neutron capture therapy

研制了一种用于加速器硼中子俘获治疗的新型水冷靶系统。利用国立放射科学研究所加速器的3MeV质子束以相同的单位面积功率对靶进行了6次测试，并验证了靶具有足够的能力将温度保持在约100度以下。根据这些结果，我们可以制造实际的目标系统。在剂量测量系统中，我们采用了新的含硼塑料，并验证了新的电离室系统测量硼中子俘获治疗系统所需中子的可能性。

New target system for the accelerator boron neutron capture therapy by using water cooling system was developed. The target was tested 6 times using the 3MeV proton beam of the accelerator in National Institute for Radiological Sciences with the same power per unit area and was verified to have enough ability to keep the temperature below about 100 degrees. From these results we can manufacture an actual target system. For the dosimetry system we used new plastic including boron and made verified the possibility of the new chamber system to measure necessary neutrons for boron neutron capture therapy system.