بررسی تاثیر موقعیت های مختلف قرارگیری روزنه ها بر عملکرد آنتن هم‌محور تک روزنه و دو روزنه در درمان سرطان در بافت کبد به روش هایپرترمیا

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه مهندسی مکانیک، دانشکده فنی و مهندسی، دانشگاه ولی عصر(عج) رفسنجان، ایران،

2 گروه مهندسی مکانیک، دانشکده فنی و مهندسی، دانشگاه ولی عصر(عج) رفسنجان، ایران

چکیده

در این پژوهش بررسی عددی روش هایپرترمیا با استفاده از آنتن روزنه­ای مایکروویو در درمان سرطان بافت کبد انجام شده ­است. مدل‌سازی مسئله در نرم‌افزار کامسول به صورت متقارن محوری و دو‌بعدی انجام شده و معادله الکترومغناطیسی با معادله انتقال حرارت زیستی کوپل شده است. همچنین در این مطالعه توزیع دما، تخریب بافت سرطانی، میزان جذب امواج ماکرویوو در بافت کبد و نرخ جذب ویژه (SAR) به صورت عددی بررسی گردید. نتایج نشان داد که آنتن دو روزنه دارای توزیع گسترده­تری از مقدار مایکروویو جذب شده نسبت به آنتن تک‌روزنه است. توزیع SAR در راستای محور طولی آنتن­ها به‌تدریج افزایش می­یابد و به نقطه بیشینه خود که مکان قرارگیری روزنه است رسیده و سپس توزیع SAR به سرعت کاهش می­یابد و در انتهای آنتن به کمترین مقدار خود می­رسد. طبق نتایج به‌دست آمده همچنین تغییرات مقدار دما در بافت کبد به نوع آنتن و عمق نفوذ بستگی دارد و توزیع دما و توزیع SAR روند مشابهی دارند. همچنین آنتن تک‌روزنه برای تومورهای بیضوی شکل و آنتن دو روزنه برای تومورهای کروی شکل مناسب است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Investigating the effect of different positions of the slot on performance of single-slot and double-slot coaxial antenna in the treatment of cancer in liver tissue by hyperthermia method

نویسندگان [English]

  • behrad haghighi 1
  • hadi sadeghpour 1
  • Mohammad shafiey 2
1 Department of Mechanical Engineering, Faculty of Engineering, Vali-e-Asr University of Rafsanjan, Iran
2 Department of Mechanical Engineering, Faculty of Engineering, Vali-e-Asr University of Rafsanjan, Iran
چکیده [English]

Numerical study of hyperthermia was performed using a microwave slot antenna in the treatment of liver cancer. The modeling of the problem in Comsol software is done symmetrically and two-dimensionally and the electromagnetic equation is coupled with the biothermal transfer equation. Temperature distribution, cancer tissue destruction, microwave absorption in liver tissue and specific absorption rate (SAR) are presented as results. The results showed that the two-hole antenna has a wider distribution of the amount of microwave absorbed than the single-slot antenna. The SAR distribution along the longitudinal axis of the antennas gradually increases and reaches its maximum point where the slot is located, and then the SAR distribution decreases rapidly and reaches its minimum at the end of the antenna. According to the results, changes in temperature in liver tissue also depend on the type of antenna and penetration depth, and temperature distribution and SAR distribution have a similar trend. Also, single-slot antenna is suitable for elliptical tumors and double-slot antenna is suitable for spherical tumors.

کلیدواژه‌ها [English]

  • Liver tissue
  • slot antenna
  • microwave
  • hyperthermia
  • cancer
  • specific absorption rate (SAR)
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