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Focal spot size evaluation of a focused lens in human body

In hyperthermia therapy, it is significant to focus microwave to the targeted therapeutic spot as to avoid high temperature or hot spots at the surface or surrounding healthy tissues. This paper presents near-field focusing concept which is implemented using converging dielectric lens and a lambda/2...

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Main Authors: Abd. Rahman, Amirah, Kamardin, Kamilia, Yamada, Yoshihide
Format: Conference or Workshop Item
Published: 2021
Subjects:
Q Science (General)
TA Engineering (General). Civil engineering (General)
Online Access:http://eprints.utm.my/id/eprint/95981/
http://dx.doi.org/10.1109/RFM50841.2020.9344740
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id my.utm.95981
record_format eprints
spelling my.utm.959812022-07-01T07:15:16Z http://eprints.utm.my/id/eprint/95981/ Focal spot size evaluation of a focused lens in human body Abd. Rahman, Amirah Kamardin, Kamilia Yamada, Yoshihide Q Science (General) TA Engineering (General). Civil engineering (General) In hyperthermia therapy, it is significant to focus microwave to the targeted therapeutic spot as to avoid high temperature or hot spots at the surface or surrounding healthy tissues. This paper presents near-field focusing concept which is implemented using converging dielectric lens and a lambda/2 dipole at 2450MHz as a radiating element to generate small focusing spot. Lens's diameter (D-L) of 30, 50 and 70 cm have been designed and simulated in free space and inside human body equivalent phantom. The simulation results are presented and shown that larger size of DL resulted in smaller focal spot size. It is observed that electric field (E-field) intensities are increased at the focal point with larger D-L of the antenna. 2021 Conference or Workshop Item PeerReviewed Abd. Rahman, Amirah and Kamardin, Kamilia and Yamada, Yoshihide (2021) Focal spot size evaluation of a focused lens in human body. In: IEEE International RF and Microwave Conference (RFM), 14 December 2020 - 16 December 2020, Kuala Lumpur, Malaysia. http://dx.doi.org/10.1109/RFM50841.2020.9344740
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic Q Science (General)
TA Engineering (General). Civil engineering (General)
spellingShingle Q Science (General)
TA Engineering (General). Civil engineering (General)
Abd. Rahman, Amirah
Kamardin, Kamilia
Yamada, Yoshihide
Focal spot size evaluation of a focused lens in human body
description In hyperthermia therapy, it is significant to focus microwave to the targeted therapeutic spot as to avoid high temperature or hot spots at the surface or surrounding healthy tissues. This paper presents near-field focusing concept which is implemented using converging dielectric lens and a lambda/2 dipole at 2450MHz as a radiating element to generate small focusing spot. Lens's diameter (D-L) of 30, 50 and 70 cm have been designed and simulated in free space and inside human body equivalent phantom. The simulation results are presented and shown that larger size of DL resulted in smaller focal spot size. It is observed that electric field (E-field) intensities are increased at the focal point with larger D-L of the antenna.
format Conference or Workshop Item
author Abd. Rahman, Amirah
Kamardin, Kamilia
Yamada, Yoshihide
author_facet Abd. Rahman, Amirah
Kamardin, Kamilia
Yamada, Yoshihide
author_sort Abd. Rahman, Amirah
title Focal spot size evaluation of a focused lens in human body
title_short Focal spot size evaluation of a focused lens in human body
title_full Focal spot size evaluation of a focused lens in human body
title_fullStr Focal spot size evaluation of a focused lens in human body
title_full_unstemmed Focal spot size evaluation of a focused lens in human body
title_sort focal spot size evaluation of a focused lens in human body
publishDate 2021
url http://eprints.utm.my/id/eprint/95981/
http://dx.doi.org/10.1109/RFM50841.2020.9344740
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score 13.211869

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