کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1891266 1533522 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effective atomic numbers and electron densities of some human tissues and dosimetric materials for mean energies of various radiation sources relevant to radiotherapy and medical applications
ترجمه فارسی عنوان
اعداد اتمی موثر و تراکم الکترونی برخی از بافت های انسانی و مواد دوزیستی برای انرژی متوسط ​​منابع مختلف تابش مربوط به رادیوتراپی و کاربردهای پزشکی
کلمات کلیدی
شماره اتمی موثر، تراکم الکترون، انرژی متوسط ​​فوتون، منبع تابش
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم تشعشع
چکیده انگلیسی


• Mean energies for different radiation sources have been determined.
• Human tissues and dosimetric materials have been investigated according to different sources.
• Different methods were applied for calculation of Eeff, Zeff and neff.

Effective atomic numbers, Zeff, and electron densities, neff, are convenient parameters used to characterise the radiation response of a multi-element material in many technical and medical applications. Accurate values of these physical parameters provide essential data in medical physics. In the present study, the effective atomic numbers and electron densities have been calculated for some human tissues and dosimetric materials such as Adipose Tissue (ICRU-44), Bone Cortical (ICRU-44), Brain Grey/White Matter (ICRU-44), Breast Tissue (ICRU-44), Lung Tissue (ICRU-44), Soft Tissue (ICRU-44), LiF TLD-100H, TLD-100, Water, Borosilicate Glass, PAG (Gel Dosimeter), Fricke (Gel Dosimeter) and OSL (Aluminium Oxide) using mean photon energies, Em, of various radiation sources. The used radiation sources are Pd-103, Tc-99, Ra-226, I-131, Ir-192, Co-60, 30 kVp, 40 kVp, 50 kVp (Intrabeam, Carl Zeiss Meditec) and 6 MV (Mohan-6 MV) sources. The Em values were then used to calculate Zeff and neff of the tissues and dosimetric materials for various radiation sources. Different calculation methods for Zeff such as the direct method, the interpolation method and Auto-Zeff computer program were used and agreements and disagreements between the used methods have been presented and discussed. It has been observed that at higher Em values agreement is quite satisfactory (Dif.<5%) between the adopted methods.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Radiation Physics and Chemistry - Volume 102, September 2014, Pages 139–146
نویسندگان
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