Synthesis of Optimum Microwave Antenna Applicators for Use in Treating Deep Localized Tumors

Rappaport, Carey M.

doi:10.1016/b978-0-444-01490-0.50007-6

Cited by 6 publications

(2 citation statements)

References 38 publications

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“…At lower frequencies, however, it is possible to reach deeper tumours although focusing becomes worse. Frequencies most commonly used in medicine applications vary between 100 and 1000 MHz (RAPPAPORT, 1989). The value 915 MHz was chosen as the working frequency because it provides penetration and focusing compatible with medical constraints.…”

Section: Sar = O" Ietotl 2 (17) Pmentioning

confidence: 99%

“…In addition, the recent increase in mobile communications has resulted in a large number of preventive studies concerning the effects of EM radiation on the head (GANDHI et al, 1996;OKONOIEWSKI and STUCHLY, 1996). Some researchers have tried to concentrate the EM power generated by an array antenna for hyperthermia applications (DURNEu 1992;LO et al, 1966;LOANE III and LEE, 1989;RAPPAPORT, 1989). In LO et al (1966) the energy is focused at a point within the near field region generalising the previous developments for the far field and one polarisation.…”

Section: Introductionmentioning

confidence: 99%

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Design of a microwave array hyperthermia applicator with a semicircular reflector

Sabariego

Landesa

Obelleiro

1999

Med. Biol. Eng. Comput.

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The design of a hyperthermia applicator for heating biological tissues is presented in which the applicator consists of an array antenna surrounded by a perfect electrically conducting reflector. The heat hazard to superficial tissues is reduced by the introduction of a dielectric protecting layer over them. A method of moments formulation is applied to approximate the electric field within the biological medium and a closed form expression is presented for the electromagnetic coupling problem, which enables an optimisation procedure to be performed. The applicator enhances both penetration and focusing: deep tumours, close to the bone region, are heated and the percentage of biologically healthy tissue exposed to a specific absorption rate (SAR) hazard level diminishes by 53.8%.

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Section: Sar = O" Ietotl 2 (17) Pmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design of a microwave array hyperthermia applicator with a semicircular reflector

Sabariego

Landesa

Obelleiro

1999

Med. Biol. Eng. Comput.

View full text Add to dashboard Cite

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Radiation of Electromagnetic Waves by Impedance Vibrators in Material Medium over a Perfectly Conducting Plane

Nesterenko

Katrich

Penkin

et al. 2010

Lecture Notes in Electrical Engineering

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A 2 1/4-turn spiral antenna for catheter cardiac ablation

Rappaport

Wang

et al. 1999

IEEE Trans. Biomed. Eng.

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To investigate the delivery of microwave energy by a catheter positioned inside the heart for ablating small abnormal regions producing cardiac arrhythmias, a 2 1/4-turn spiral catheter-based microwave antenna applicator has been developed. The antenna consists of the center conductor with continuous insulating material extending from the coaxial feed cable formed into a spiral antenna. The insulator completely isolates the center conductor from tissue. Phantom experiments were performed on homogeneous tissue equivalent medium. The reflection coefficient of the antenna at different frequencies and for different spiral lengths, the time course and temperature profile of an ablation, and the dosimetry of power versus temperature, all indicate that the high-power heating patterns from this antenna are both wider and deeper than with the other microwave antenna systems and radio-frequency electrodes.

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Synthesis of Optimum Microwave Antenna Applicators for Use in Treating Deep Localized Tumors

Cited by 6 publications

References 38 publications

Design of a microwave array hyperthermia applicator with a semicircular reflector

Design of a microwave array hyperthermia applicator with a semicircular reflector

Radiation of Electromagnetic Waves by Impedance Vibrators in Material Medium over a Perfectly Conducting Plane

A 2 1/4-turn spiral antenna for catheter cardiac ablation

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