Abstract
AbstractRadiative hyperthermia is a clinically applied cancer treatment modality where antenna design is crucial to achieving therapeutic goals. Serving as the building block of a phased‐array configuration, antennas are typically arranged in a cylindrical or elliptical array called applicator. This short communication proposes an elliptical phased array applicator based on a compact, UWB design from the category of double‐ridged horn antennas customized for hyperthermia systems. The performance of the antenna, named open ridged‐waveguide, has been experimentally assessed based on the quality metrics of the hyperthermic community. The proposed design achieves an ultra‐wideband range of operation from 400 to 800 MHz with an aperture size of 3 by 4 cm. Moreover, thanks to the shielding provided by the metallic housing, the design proves good isolation better than −30 dB throughout the band. The power deposition capability of the proposed applicator followed by the thermal analysis is also investigated for a realistic head and neck patient model. The results indicate very good quality metrics achieved in the treatment planning of the patient.
Highlights
During the past couple of decades, antennas have found various applications in biomedical engineering, leading to a growing branch of research called bio-electromagnetics (BioEM)
This means that a matching medium, commonly referred to as water bolus, between the antenna and the body is needed to facilitate the wave transition into the body and to prevent the heating of the body surface.[4]
This study proposes an elliptical phased array applicator for deep HT that uses a new antenna model from the doubleridged horn family.[13]
Summary
During the past couple of decades, antennas have found various applications in biomedical engineering, leading to a growing branch of research called bio-electromagnetics (BioEM). BioEM includes, but is not limited to, microwave imaging[1] and hyperthermia (HT).[2] The aim of HT is to increase the efficacy of routine cancer treatment modalities, such as radiotherapy and chemotherapy, by targeting focused EM energy at the tumors under treatment. Dealing with lossy human tissues, an appropriate antenna for HT applicators needs to operate in the lower part of the UHF band to penetrate deeply enough into the body. This is because the penetration depth falls rapidly at higher frequencies. An open-source computational platform, called FEniCS,[15] is used
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