Author/Authors
Yaşar, Doğan Türkiye Atom Enerjisi Kurumu (TAEK) - Çekmece Nuclear Research and Training Center - Metrology Unit, Secondary Standard Dosimetry Laboratory, Turkey , Demir, Bayram Istanbul University - Science Faculty - Department of Physics, Turkey , Kam, Erol Türkiye Atom Enerjisi Kurumu (TAEK) - Çekmece Nuclear Research and Training Center - Metrology Unit, Secondary Standard Dosimetry Laboratory, Turkey , Karahan, Gürsel Türkiye Atom Enerjisi Kurumu (TAEK) - Çekmece Nuclear Research and Training Center - Metrology Unit, Secondary Standard Dosimetry Laboratory, Turkey , Okutan, Murat Istanbul University - Oncology Institute - Department of Medical Physics, Turkey
Title Of Article
A New TLD Holder for External Radiotherapy Beam Audit
شماره ركورد
35982
Abstract
In present study, a special TLD holder inserted to a solid water phantom for TLD irradiation was designed and results were compared with the TLD results irradiated in a plastic bucked using International Atomic Energy Agency (IAEA), standard TLD holder as recommended by IAEA. Powder TLD-100 was used in the study and the capsules filling powder TLD were irradiated using Co-60 beams in RW3 type solid phantom with new holder. The absorbed dose measurements for TLD were performed by Harshaw 4500 model TLD reader and the results were confirmed using a 0.6 cc ionization chamber in RW3 plastic phantom. For different irradiation setup, the closest dose values to the prescribed dose of 2 Gy were only obtained with using the new TLD holder (2.022+ 0.017cGy) with lowest error value. The average and standard deviation for standard IAEA water phantom and plastic bucked set-up were 2.014+0.024 cGy and 1.948+0.062cGy respectively. While the maximum average absolute difference (%3.5) and the maximum % error (%3.16) were found in the hospital condition with bucket filled with water, the minimum average absolute difference and the minimum % error were %1.32 and %0.86 respectively, with our new TLD holder in the solid water phantom . In our opinion, the reason of this good consistency is the reproducibility of TLD position that created by means of our TLD holder. This study shows that non-standard conditions may cause important differences between SSDL (Secondary Standard Dosimetry Laboratory) and hospital dose results.
From Page
92
NaturalLanguageKeyword
Radiotherapy , TLD , quality audit
JournalTitle
Süleyman Demirel University Faculty of Arts and Science Journal of Science
To Page
99
JournalTitle
Süleyman Demirel University Faculty of Arts and Science Journal of Science
Link To Document