Evaluation of dose from kV cone-beam computed tomography during radiotherapy: a comparison of methodologies

被引：0
作者：
Buckley, J. [1 ]
Wilkinson, D. [2 ]
Malaroda, A. [1 ]
Metcalfe, P. [1 ]
机构：
[1] Univ Wollongong, Ctr Med Radiat Phys, Wollongong, NSW 2522, Australia
[2] Wollongong Hosp, Illawarra Canc Care Ctr, Wollongong, NSW 2500, Australia
来源：
MICRO-MINI & NANO-DOSIMETRY & INNOVATIVE TECHNOLOGIES IN RADIATION THERAPY (MMND&ITRO2016) | 2017年 / 777卷
关键词：
CT; DOSIMETRY;
D O I：
10.1088/1742-6596/777/1/012003
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Three alternative methodologies to the Computed-Tomography Dose Index for the evaluation of Cone-Beam Computed Tomography dose are compared, the Cone-Beam Dose Index, IAEA Human Health Report No. 5 recommended methodology and the AAPM Task Group 111 recommended methodology. The protocols were evaluated for Pelvis and Thorax scan modes on Varian (R) On-Board Imager and Truebeam kV XI imaging systems. The weighted planar average dose was highest for the AAPM methodology across all scans, with the CBDI being the second highest overall. A 17.96% and 1.14% decrease from the TG-111 protocol to the IAEA and CBDI protocols for the Pelvis mode and 18.15% and 13.10% decrease for the Thorax mode were observed for the XI system. For the OBI system, the variation was 16.46% and 7.14% for Pelvis mode and 15.93% to the CBDI protocol in Thorax mode respectively.
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页数：4
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