کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10731445 | 1043227 | 2005 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The effect of pull back technique on dose distribution in the junction region for 90Sr/90Y intravascular brachytherapy sources
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
تشعشع
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The aim of this work is to investigate the effect of pull back technique on dose distribution in the junction region for intravascular brachytherapy (IVBT) with beta source train. In this purpose, the five positions which were created with 0Â cm gap, 2.5, 5Â mm gap and 2.5, 5Â mm overlap between active seeds were studied. The measurement for IVBT beta source train (Novoste Beta Cath) with 40Â mm active source length were performed using radiochromic film dosimetry. Radiochromic film measurements were performed using a specially manufactured phantom, which was made of a white polystyrene material in our department. Radiochromic films were calibrated using 60Co beams with 50, 100, 150, 200Â Gy doses at 5Â cm depth within solid water phantom in the same day. In the presence of a 2.5Â mm (1 seed) and 5Â mm (2 seed) gap, the dose in the middle of junction region can be decreased to 44% and 23%, respectively. On the other hand, in the presence of a 2.5Â mm (1 seed) and 5Â mm (2 seed) overlap, the dose can be increased as to much as 62% and 74%, respectively. In an IVBT application using pull back technique, the best dose distribution in the junction region was obtained with a perfect end-to-end match and our results show that significant underdose or overdose regions in the junction can occur in the presence of gap or overlap. Therefore, to create a perfect end-to-end match in an IVBT application using pull back technique, all movements of balloon should be recorded and the sources have been carefully placed to irradiate the injured vessel part with sufficient radiation doses.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Radiation Measurements - Volume 39, Issue 1, January 2005, Pages 29-32
Journal: Radiation Measurements - Volume 39, Issue 1, January 2005, Pages 29-32
نویسندگان
Bayram Demir, Hatice Bilge, Fazilet O. Dincbas, Ayse Koca, Songul Karacam, Basri Gunhan,