Transactions of the Atomic Energy Society of Japan
Online ISSN : 2186-2931
Print ISSN : 1347-2879
ISSN-L : 1347-2879
Development of the Patient Setting System for Medical Irradiation with Research Reactor
Hiroaki KUMADAAkira MATSUMURAYoshinobu NAKAGAWA
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2002 Volume 1 Issue 1 Pages 59-68

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Abstract
To perform Boron Neutron Capture Therapy (BNCT) with epithermal neutron beam, it is essential to make treatment planning based on the calculated irradiation dose and its distribution because epithermal beam penetrate to deeper region which can cause an unwanted radiation damage outside the target. A Computational Dosimetry System (JCDS) has been developed at Japan Atomic Energy Research Institute, which can calculate the irradiation dose and provide dose distribution by using MCNP calculation. Using this system, target dose, normal tissue dose, dose to the critical organ can be calculated.
The JCDS treatment planning should be adjusted to the actual irradiation conditions (i.e. accurate patient irradiation position, especially distance and angle relative to the neutron beam collimator) which is important to perform an accurate irradiation previously calculated from to the treatment planning. For this purpose, a Patient Setting System has been developed which can reflect the data obtained from JCDS. Basic experiments using the head phantom and clinical application of this system in cases of BNCT, the accuracy of this system have been evaluated and have been proven to be accurate with the error within 5mm. In conclusion, by combining JCDS and the Patient Setting System, an efficient and safe clinical BNCT trial using epithermal beam could be performed.
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