کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1885386 | 1043410 | 2009 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The Effect of Oblique Electron Beams to the Surface Dose Under the Bolus
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
تشعشع
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: The Effect of Oblique Electron Beams to the Surface Dose Under the Bolus The Effect of Oblique Electron Beams to the Surface Dose Under the Bolus](/preview/png/1885386.png)
چکیده انگلیسی
The aim of this study is to determine the effect of bolus to the surface dose in oblique electron incidences. Irradiations with 4.5, 6, 7.5, 9, and 12-MeV electron beams were made for the incidence angles of 0°, 15°, 30°, 45°, 60°, 75° and using 3 different bolus setups: (1) unbolused (no bolus), (2) 5-mm bolus, and (3) 10-mm bolus. A set of EBT gafchromic film pieces placed on the phantom surface was irradiated with a 400-cGy dose at Dmax for each setup. Whereas surface dose increased with increasing incidence degrees in the absence of a bolus, it was seen that there was a large surface dose decreasing in the presence of a bolus with increasing incidence angles. For 60° incidence angle, the relative surface doses with unbolused setup were: 88.10%, 90.06%, 89.35%, 90.25%, and 97.10%; with 5-mm bolus: 66.45%, 81.20%, 99.78%, 124.43%, and 116.07%; and with 10-mm bolus: 22.65%, 45.20%, 55.20%, 65.82%, and 90.27% for 4.5, 6, 7.5, 9, and 12 MeV, respectively. The use of bolus in the treatment of highly oblique surfaces with low-energy electron beams significantly decreases the surface dose.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Medical Dosimetry - Volume 34, Issue 4, Winter 2009, Pages 311-316
Journal: Medical Dosimetry - Volume 34, Issue 4, Winter 2009, Pages 311-316
نویسندگان
Bayram Ph.D., Murat M.Sc., Aydin M.Sc., Evren M.Sc., Hatice Ph.D.,