کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9875862 | 1533331 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Characterization of responses and comparison of calibration factor for commercial MOSFET detectors
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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: Characterization of responses and comparison of calibration factor for commercial MOSFET detectors Characterization of responses and comparison of calibration factor for commercial MOSFET detectors](/preview/png/9875862.png)
چکیده انگلیسی
A commercial metal oxide silicon field effect transistor (MOSFET) dosimeter of model TN502-RD has been characterized for its linearity, reproducibility, field size dependency, dose rate dependency, and angular dependency for Cobalt-60 (60Co), 6-MV, and 15-MV beam energies. The performance of the MOSFET clearly shows that it is highly reproducible, independent of field size and dose rate. Furthermore, MOSFET has a very high degree of linearity, with r-value > 0.9 for all 3 energies. The calibration factor for 2 similar MOSFET detectors of model TN502-RD were also estimated and compared for all 3 energies. The calibration factor between the 2 similar MOSFET detectors shows a variation of about 1.8% for 60Co and 15 MV, and for 6 MV it shows variation of about 2.5%, indicating that calibration should be done whenever a new MOSFET is used. However, the detector shows considerable angular dependency of about 8.8% variation. This may be due to the variation in radiation sensitivity between flat and bubble sides of the MOSFET, and indicates that positional care must be taken while using MOSFET for stereotactic radiosurgery and stereotactic radiotherapy dosimetric applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Medical Dosimetry - Volume 30, Issue 4, Winter 2005, Pages 213-218
Journal: Medical Dosimetry - Volume 30, Issue 4, Winter 2005, Pages 213-218
نویسندگان
Ganesan M.Sc, Durai M.Sc, Krishnamurthy M.Sc, Vellaiyan M.Sc, Natanasabapathi M.Sc, Tharmar Ph.D., Rakeshchander Ph.D., Gourakishore M.D., Jagadeesan Ph.D., Prakasarao Ph.D., Singaravelu Ph.D.,