RESUMO
A re-entrant resonant cavity applicator system for non-invasive brain tumor hyperthermia treatments was presented. We have already confirmed the effectiveness of the heating properties of this heating system with cylindrical agar phantoms and with computer simulations.
Assuntos
Neoplasias Encefálicas/terapia , Cabeça/anatomia & histologia , Hipertermia Induzida/métodos , Processamento de Imagem Assistida por Computador/métodos , Modelos Anatômicos , Simulação por Computador , Desenho Assistido por Computador , Olho/anatomia & histologia , Análise de Elementos Finitos , Humanos , Imageamento por Ressonância Magnética , Tomografia Computadorizada por Raios XRESUMO
This paper describes heating properties of the developed coaxial needle applicator made of a shape memory alloy (SMA) for brain tumor hyperthermia treatments to avoid undesirable hotspots. We estimated the temperature distribution inside an agar phantom by the finite element method (FEM) and heated the agar phantom with the developed needle applicator.
Assuntos
Neoplasias Encefálicas/fisiopatologia , Neoplasias Encefálicas/terapia , Ablação por Cateter/instrumentação , Hipertermia Induzida/instrumentação , Modelos Biológicos , Agulhas , Temperatura Corporal , Simulação por Computador , Desenho de Equipamento , Análise de Falha de Equipamento , Calefação/instrumentação , Humanos , Resultado do TratamentoRESUMO
Since the human brain is protected by the skull, it is not easy to non-invasively heat deep brain tumors with electromagnetic energy for hyperthermia treatments. Generally, needle type applicators were used in clinical practice to heat brain tumors. To expand the heating area of needle type applicators, we have developed a new type of needle made of a shape memory alloy (SMA). In this paper, heating properties of the proposed SMA needle type applicator were discussed. Here, in order to apply the SMA needle type applicator clinically. First, we constructed an anatomical 3-D FEM model from MRI and X-ray CT images using 3D-CAD software. Second, we estimated electric and temperature distributions to confirm the SMA needle type applicator using the FEM soft were JMAG-Studio. From these results, it was confirmed that the proposed method can expand the heating area and control the heating of various sizes of brain tumors.