A COMPARISON OF IN-AIR AND IN-WATER CALIBRATION OF A DOSIMETRY SYSTEM USED FOR RADIATION DOSE ASSESSMENT IN CANCER THERAPY

被引：6
|
作者：
Arshed, Waheed [1 ]
Mahmood, Khalid [1 ]
Qazi, Ikramullah [1 ]
Ullah, Asad [1 ]
Akhter, Perveen [1 ]
Ahmad, Syed Salman [1 ]
Jamil, Zeeshan
机构：
[1] PINSTECH, Div Hlth Phys, Islamabad, Pakistan
来源：
NUCLEAR TECHNOLOGY & RADIATION PROTECTION | 2010年 / 25卷 / 01期
关键词：
absorbed dose calibration; kerma to absorbed dose conversion;
D O I：
10.2298/NTRP1001051A
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
An accurate calibration of the therapy level radiation dosimetry system has a pivotal role in the accuracy of dose delivery to cancer patients. The two methods used for obtaining a tissue equivalent calibration of the system: air kerma calibration and its conversion to a tissue equivalent value (absorbed dose to water) and direct calibration of the system in a water phantom, have been compared for identical irradiation geometry It was found that the deviation between the two methods remained within a range of 0% to +/- 1.7% for the PTW UNIDOS dosimetry system. This means that although the recommended method is in-water calibration, under exceptional circumstances, in-air calibration may be used as well.
引用
收藏
页码：51 / 54
页数：4
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