RESUMEN
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.
Asunto(s)
Neoplasias Encefálicas/fisiopatología , Neoplasias Encefálicas/terapia , Ablación por Catéter/instrumentación , Hipertermia Inducida/instrumentación , Modelos Biológicos , Agujas , Temperatura Corporal , Simulación por Computador , Diseño de Equipo , Análisis de Falla de Equipo , Calefacción/instrumentación , Humanos , Resultado del TratamientoRESUMEN
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.
Asunto(s)
Neoplasias Encefálicas/terapia , Cabeza/anatomía & histología , Hipertermia Inducida/métodos , Procesamiento de Imagen Asistido por Computador/métodos , Modelos Anatómicos , Simulación por Computador , Diseño Asistido por Computadora , Ojo/anatomía & histología , Análisis de Elementos Finitos , Humanos , Imagen por Resonancia Magnética , Tomografía Computarizada por Rayos XRESUMEN
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.