کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10434974 | 910801 | 2015 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optimization of dual slot antenna using floating metallic sleeve for microwave ablation
ترجمه فارسی عنوان
بهینه سازی آنتن شکاف دوگانه با استفاده از آستین فلزی شناور برای تخلیه مایکروویو
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کلمات کلیدی
نسبت محوری، سرطان، اسلات دوگانه، روش عنصر محدود آستین فلزی، تخلیه مایکروویو، ضریب بازتاب،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی پزشکی
چکیده انگلیسی
Backward heating reduction is vital in power distribution optimization in microwave thermal ablation. In this study, we optimized dual slot antenna to yield reduction in backward heating pattern along the antenna shaft with the application of floating metallic sleeve. Finite element methods were used to generate the electromagnetic (EM) field and thermal distribution in liver tissue. The position of the sleeve from the tip of the probe (zâ=â0âmm) was varied within the range 14 â¤âzââ¤â22âmm while sleeve length was varied within 16 â¤âzââ¤â48âmm at 2âmm interval using operating frequency of 2.45âGHz. The best optimized design has reflection coefficient of â20.87âdB and axial ratio of 0.41 when the sleeve position was at 17âmm and sleeve length was 18âmm. Experimental validation shows that inclusion of a floating metallic sleeve on dual slot antenna for hepatic microwave ablation averagely increased ablation diameter and aspect ratio by 17.8% and 33.9% respectively and decreased ablation length by 11.2%. Reduction in backward heating and increase in power deposition into liver tissue could be achieved by using this antenna to provide greater efficiency and localization of specific absorption rate in delivering microwave energy for hepatic ablation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Medical Engineering & Physics - Volume 37, Issue 4, April 2015, Pages 384-391
Journal: Medical Engineering & Physics - Volume 37, Issue 4, April 2015, Pages 384-391
نویسندگان
Z.A. Ibitoye, E.O. Nwoye, M.A. Aweda, A.A. Oremosu, C.C. Annunobi, O.N. Akanmu,