به کارگیری روش تداخل سنجی تمام نگاری دیجیتال با نوردهی دوگانه برای محاسبه توزیع دز جذبی در پلیمر پلی متیل متاآکریلات

نویسندگان

سازمان انرژی اتمی ایران

10.22052/5.4.51

چکیده

تداخل­ سنجی تمام ­نگاری دیجیتال به روش نوردهی دوگانه، روش نوری توانمند و پرکاربردی در زمینه اندازه­ گیری دقیق تغییرات ایجاد شده در کمیت‌های فیزیکی خاص نظیر چگالی، ضریب شکست و غیره است. در این مقاله برای برآورد میزان دز جذبی حاصل از باریکه الکترونی در محیط پلیمر پلی­ متیل متاآکریلات، این روش مدل­ سازی و مورد بررسی قرار گرفته است. با بهره­ گیری از این روش می‌توان پس از تفسیر طرح نوارهای تداخلی حاصله، منحنی‌های هم-دز و منحنی دز-عمق را که کاربرد بسیاری جهت طراحی درمان و پایش میزان دز جذبی دارند را به­ دست آورد. نتایج محاسبات بیانگر قابلیت به­ کارگیری این روش نوری برای پایش برخط میزان دز جذبی حاصل از تابش پرتو، از طریق بررسی طرح نوارهای تداخلی شکل گرفته است.

کلیدواژه‌ها

عنوان مقاله [English]

Application of double-exposure digital holographic interferometry method for calculating the absorbed dose in poly(methyl methacrylate) environment

نویسندگان [English]

  • Amir Mohammad Beigzadeh
  • Mohammad Reza Rashidian Vaziri
  • Farhood Ziaie
چکیده [English]

Double-exposure digital holographic interferometry is a powerful and widespread technique for fine measurement of the induced changes in special physical properties, like density, refractive index and etc. In this paper, application of this technique for measuring the absorbed dose from an electron radiation source in poly (methyl methacrylate) material is studied through modeling. The method of applying this technique for interpretation of the resulted fringe pattern and obtaining the pattern of isodose regions and the percent depth dose curve, that are ubiquitously used for treatment planning and monitoring of the absorbed dose, is investigated. Our results prove the capability of this optical technique for online monitoring of the absorbed dose from a radiation source through interpreting the formed fringe pattern.
 

کلیدواژه‌ها [English]

  • Radiation dosimetry
  • Digital holographic interferometry
  • Tissue-equivalent polymers
  • Poly (methyl methacrylate)
  • interferometer

مراجع

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