Thermal Evaluation of Multi-Antenna Systems Proposed to Treat Bone Tumors: Finite Element Analysis

Thermal Evaluation of Multi-Antenna Systems Proposed to Treat Bone Tumors: Finite Element Analysis

Microwave ablation is commonly used in soft tissue tumors, but its application in bone tumors has been barely analyzed. Antennas to treat bone tissue (~3 cm2), has been lately designed. Bone tumors at pathological stage T1 can reach 8 cm wide. An antenna cannot cover it; therefore, our goal is to ev...

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Published in:Sensors (Basel, Switzerland) Vol. 22; no. 19; p. 7604
Main Authors: Trujillo-Romero, Citlalli Jessica, Dionisio Merida, Juan, Ramírez-Guzmán, Texar Javier, Martínez-Valdez, Raquel, Leija-Salas, Lorenzo, Vera-Hernández, Arturo, Rico-Martínez, Genaro, Flores-Cuautle, José Jesús Agustín, Gutiérrez-Martínez, Josefina, Sacristán-Rock, Emilio
Format: Journal Article
Language:English
Published: Switzerland MDPI AG 01-10-2022
MDPI
Subjects:
Ablation
Analysis
antenna array
Antenna arrays
Antennas
Antennas (Electronics)
Bone and Bones
Bone cancer
Bone Neoplasms - diagnostic imaging
Bone Neoplasms - therapy
bone tumors
Bones
Cancer
Cancer therapies
Care and treatment
Chemotherapy
Configurations
Electromagnetism
FEM modeling
Finite Element Analysis
Finite element method
Humans
microwave ablation
Microwaves - therapeutic use
Permeability
Propagation
Radiation therapy
Soft tissues
Temperature
thermal ablation
Thermal analysis
Tumors
Mexico
bone tumors
thermal ablation
microwave ablation
FEM modeling
antenna array
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Summary:Microwave ablation is commonly used in soft tissue tumors, but its application in bone tumors has been barely analyzed. Antennas to treat bone tissue (~3 cm2), has been lately designed. Bone tumors at pathological stage T1 can reach 8 cm wide. An antenna cannot cover it; therefore, our goal is to evaluate the thermal performance of multi-antenna arrays. Linear, triangular, and square configurations of double slot (DS) and monopole (MTM) antennas were evaluated. A parametric study (finite element method), with variations in distance between antennas (ad) and bone thickness (bt) was implemented. Array feasibility was evaluated by SWR, ablated tissue volume, etc. The linear configuration with DS and MTM antennas showed SWR ≤ 1.6 for ad = 1 mm−15 mm and bt = 20 mm−40 mm, and ad = 10 mm−15 mm and bt = 25 mm−40 mm, respectively; the triangular showed SWR ≤ 1.5 for ad = 5 mm−15 mm and bt = 20 mm−40 mm and ad = 10 mm−15 mm and bt = 25 mm−40 mm. The square configuration (DS) generated SWR ≤ 1.5 for ad = 5 mm−20 mm and bt = 20 mm−40 mm, and the MTM, SWR ≤ 1.5 with ad = 10 mm and bt = 25 mm−40 mm. Ablated tissue was 4.65 cm3−10.46 cm3 after 5 min. According to treatment time and array configuration, maximum temperature and ablated tissue is modified. Bone tumors >3 cm3 can be treated by these antenna-arrays.
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ISSN:1424-8220
1424-8220
DOI:10.3390/s22197604