RESUMEN
In boron neutron capture therapy, it is important to evaluate the dose administered to a patient's body outside the tumour area. The exposure dose is evaluated by calculation; however, the calculated value must be validated using a measured value. The dose evaluations based on the measured neutron spectrum are investigated. Multi-foil activation, combined with a LiCaAlF6 scintillation detector and an imaging plate, is proposed as a measurement method. The proposed method can measure the neutron spectrum at various points quickly.
Asunto(s)
Terapia por Captura de Neutrón de Boro/métodos , Terapia por Captura de Neutrón de Boro/efectos adversos , Terapia por Captura de Neutrón de Boro/estadística & datos numéricos , Calibración , Relación Dosis-Respuesta en la Radiación , Neutrones Rápidos/efectos adversos , Neutrones Rápidos/uso terapéutico , Humanos , Neoplasias/radioterapia , Fantasmas de Imagen , Dosificación Radioterapéutica , Conteo por CintilaciónRESUMEN
A numerical model of plasma transport and electromagnetic field in the J-PARC (Japan Proton Accelerator Research Complex) radio frequency ion source has been developed to understand the relation between antenna coil heat loadings and plasma production/transport processes. From the calculation, the local plasma density increase is observed in the region close to the antenna coil. Electrons are magnetized by the magnetic field line with absolute magnetic flux density 30-120 Gauss which leads to high local ionization rate. The results suggest that modification of magnetic configuration can be made to reduce plasma heat flux onto the antenna.
