A Compact Microstrip Spiral Antenna Embedded in Water Bolus for Hyperthermia Applications

Korkmaz, Erdal; Isik, Omer; Nassor, Mohammed Ahmed

doi:10.1155/2013/954986

Cited by 15 publications

(3 citation statements)

References 22 publications

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“…Antenna measurements at 434 MHz in Figure 9 indicated good agreement in the location of the SAR maximum and normalized contours with the simulation results. The reduced cavity‐backed patch is 32% smaller than the spiral antenna (45 × 45 mm 2 ) [Korkmaz et al, 2013] and 89% smaller than the patch antenna (90 × 134 mm 2 ) [He et al, 2016] proposed for targeted tissue heating at 434 MHz.…”

Section: Discussionmentioning

confidence: 99%

Design of Site‐Specific Microwave Phased Array Hyperthermia Applicators Using 434 MHz Reduced Cavity‐Backed Patch Antenna

Baskaran

Arunachalam

2020

Bioelectromagnetics

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Cancers of the neck, breast, and lower extremities are common malignancies diagnosed in India with a higher incidence of advanced-stage disease. Phased array (PA) applicators reported for hyperthermia treatment (HT) of the breast have small focal region and high cross-coupling, and those reported for lower extremities provide regional heating and limited steering. In this study, we present the numerical design of site-specific PA applicators for HT of large solid tumors in the neck, breast, and lower extremities using a miniaturized 434 MHz cavity-backed water-loaded patch antenna. The fabricated antenna has 38 × 36 mm 2 aperture, more than 90% power coupling, 25 MHz bandwidth, and good agreement between simulated and measured specific absorption rate (SAR) in phantom. The site-specific applicators demonstrated less power reflection (<−17.9 dB) and crosscoupling (<−26.8 dB) for 5 mm interring spacing. SAR indicators for 64 cc tumor at varying locations in simplified layered three-dimensional (3D) tissue models of the neck, breast, and leg showed average power absorption ratio (aPA ratio) ≥ 3.16, target to hotspot quotient (THQ) ≥ 0.57, 25% iso-SAR coverage (TC 25) ≥ 81%, and 50% iso-SAR coverage (TC 50) ≥51.8%. Simulation results of site-specific applicators for 3D inhomogeneous patient models showed aPA ratio ≥ 5.98, THQ ≥ 0.9, TC 50 ≥ 86%, and 100% TC 25 for all sites. It is concluded that the 434 MHz miniaturized cavity-backed patch antenna can be used to develop high-density PA applicators with 12-24 antennas for HT of large solid tumors (≥4 cm) in the neck, breast, and lower extremities with 3D steering ability and less cross-coupling (

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Section: Discussionmentioning

confidence: 99%

Design of Site‐Specific Microwave Phased Array Hyperthermia Applicators Using 434 MHz Reduced Cavity‐Backed Patch Antenna

Baskaran

Arunachalam

2020

Bioelectromagnetics

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“…Hipertermi veya mikrodalga görüntüleme araştırmalarında deneyler uzun süreye yayıldığı için bu jellerin zamana karşı deformasyonu oda sıcaklığı ve soğutucu ortamında incelenmiştir. Bu çalışma, meme kanseri için 434 MHz'de ISM bandında bir hipertermi aplikatörünün geliştirilmesine yönelik çalışmayı desteklemektedir [Korkmaz 2015], [Korkmaz 2013]. Bu amaçla deri, kas, yağ ve kanserli dokuları taklit eden jeller önerilmiştir.…”

Section: Introductionunclassified

Meme Mikrodalgası Hipertermi Aplikatörü İçin Geliştirilen Doku Taklidi Jel Karakterizasyonu

IŞIK,

KORKMAZ

2023

Afyon Kocatepe University Journal of Sciences and Engineering

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İnsan vücudu ile elektromanyetik dalgaların etkileşimi, dokuların ve hücrelerin dielektrik özellikleri gibi faktörlerin yanı sıra diğer etkenler tarafından da şekillenir. Mikrodalga hipertermi ve mikrodalga görüntüleme uygulamalarında, deney ortamı ölçüm düzeneklerinde simülasyon sonuçlarını doğrulamak için doku taklit eden materyallere ihtiyaç vardır. Bu çalışmada hipertermi uygulamalarında kullanılmak üzere kadın memelerine ait bazı doku taklit materyallerinin karakterizasyonu sunulmuştur. Karakterize edilen doku taklit malzemelerinin maliyeti ucuz ve üretim aşamaları kolaydır. Deri, kas, meme yağı ve kanserli dokular ISM bandı 434 MHz'de önerilmektedir.

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“…A controlled rise in temperature increases blood collagen and reduces joint dryness, pain and muscle spasm. This type of heat therapy is known as hyperthermia [3].…”

Section: Introductionmentioning

confidence: 99%

Design, Optimization and Simulation of Knee Pain Relief Device Using Hyperthermia Technology

Rajabi¹,

Asbagh²,

Askarizadegan³

2020

AJEA

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Hyperthermia has been introduced as a therapeutic method and adjuvant therapy in the treatment of some diseases such as breast and pancreatic cancers. On the other hand, other applications of hyperthermia have been considered. In this article, ways to treat knee pain caused by osteoarthritis, patellar chondromasia, rheumatism, knee infection, etc., have been studied using antenna hyperthermia. For antenna hyperthermia, is using a rectangular microstrip antenna, which is the simplest type of antenna. The antenna considered in this article has conformal conditions and is designed in the shape of a knee structure, to create a suitable knee covering. The antenna considered in this article has conformal conditions and is designed in the shape of a knee structure, to create a suitable knee covering. In addition to the geometric structure of the antenna, which fits the structure of the knee, the resonance frequency of the antenna is in the range of ISM standard frequencies and attempts have been made to place it at 2.4 GHz. On the other hand, to show the thermal pattern created by the antenna, the specific absorption rate of the tissue is investigated and its diagram is simulated by the antenna radiation field.

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A Compact Microstrip Spiral Antenna Embedded in Water Bolus for Hyperthermia Applications

Cited by 15 publications

References 22 publications

Design of Site‐Specific Microwave Phased Array Hyperthermia Applicators Using 434 MHz Reduced Cavity‐Backed Patch Antenna

Design of Site‐Specific Microwave Phased Array Hyperthermia Applicators Using 434 MHz Reduced Cavity‐Backed Patch Antenna

Meme Mikrodalgası Hipertermi Aplikatörü İçin Geliştirilen Doku Taklidi Jel Karakterizasyonu

Design, Optimization and Simulation of Knee Pain Relief Device Using Hyperthermia Technology

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