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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| Format: | Conference or Workshop Item |
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2021
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| _version_ | 1796866130431705088 |
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| author | Abd. Rahman, Amirah Kamardin, Kamilia Yamada, Yoshihide |
| author_facet | Abd. Rahman, Amirah Kamardin, Kamilia Yamada, Yoshihide |
| author_sort | Abd. Rahman, Amirah |
| collection | ePrints |
| 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. |
| first_indexed | 2024-03-05T21:07:34Z |
| format | Conference or Workshop Item |
| id | utm.eprints-95981 |
| institution | Universiti Teknologi Malaysia - ePrints |
| last_indexed | 2024-03-05T21:07:34Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | utm.eprints-959812022-07-01T07:15:16Z http://eprints.utm.my/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 |
| 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 |
| title | 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_short | Focal spot size evaluation of a focused lens in human body |
| title_sort | focal spot size evaluation of a focused lens in human body |
| topic | Q Science (General) TA Engineering (General). Civil engineering (General) |
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