کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10731704 1043370 2005 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The comparison of Co-60 and 4 MV photons matching dosimetry during half-beam technique
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم تشعشع
پیش نمایش صفحه اول مقاله
The comparison of Co-60 and 4 MV photons matching dosimetry during half-beam technique
چکیده انگلیسی
In this phantom study, we tried to compare matching dosimetry differences between half-blocking of Co-60 and asymmetric collimation of the 4 MV photons during craniospinal irradiation. The dose distributions are compared and discussed. Firstly, some gaps with different sizes are left between cranial and spinal field borders. Secondly, the fields are overlapped in the same sizes. We irradiate the films located in water-equivalent solid phantoms with Co-60 and 4 MV photon beams. This study indicates that the field placement errors in ± 1 mm are acceptable for both Co-60 and 4 MV photon energies during craniospinal irradiation with half-beam block technique. Within these limits the dose variations are specified in ± 5%. However, the setup errors that are more than 1 mm are unacceptable for both asymmetric collimation of 4 MV photon and half-blocking of Co-60.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Radiation Measurements - Volume 39, Issue 4, August 2005, Pages 447-450
نویسندگان
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