Theoretical analysis, design and development of a 27-MHz folded loop antenna as a potential applicator in hyperthermia treatment

Abstract

Theoretical and experimental SAR distribution results as derived from this study are in agreement. The proposed folded loop antenna seems appropriate for use in hyperthermia treatment, achieving proper planning and local treatment of deeply seated affected areas and lesions.

A flexible 70 MHz phase-controlled double waveguide system for hyperthermia treatment of superficial tumours with deep infiltration

“…This dependency of CR on tumour size was confirmed by Oldenborg et al [13]. Thus, there is a need for adequate hyperthermia equipment to ensure that each tumour can be heated effectively [10,14,15].…”

“…Less new applicator designs have been proposed for deep-seated tumours beside existing clinical systems like the aforementioned 100 MHz phased array system of Pyrexar and the 70MHz AMC-4 system. The 27 MHz inductive-folded loop antenna of Kouloulias et al [10] is a promising new development. Its large PD of 8 cm makes this antenna a good candidate for heating deepseated tumours.…”

“…This equipment is not suitable for deep-seated advanced tumours (>4 cm). Development of systems operating at lower frequencies can be effective for treatment of tumours located deeper than 4 cm [10].…”

Two 27 MHz Simple Inductive Loops, as Hyperthermia Treatment Applicators: Theoretical Analysis and Development

“…In the loop antenna setup presented in this paper, in the three-dimensional SAR distribution in relation to the penetration depth of the radiation for the central level of both radiators, significantly high values were observed while the penetration depth (50% SAR) was 2.5 cm. A way to avoid the dissimilarity and limitation of the proposed setup is the use of a folded loop antenna as a radiator in order to destroy the uniformity of the magnetic field and the induced uniformity in the electric field [ 20 ].…”

Systemic Overview of Microstrip Patch Antenna’s for Different Biomedical Applications

“…So, the usual frequencies that can be allowed for industrial, medical and scientific applications are similar for most of the antennas (around 27 MHz, 477 MHz and 2.4 MHZ) depending on the duration of using antenna. 24 Sometimes, the researchers have to face the frequency difference in the antennas used. For example, If the Antenna has frequency 27 MHZ outside the body, then it will not give the same rate inside the body.…”