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- W2613746616 abstract "Abstract Objective This study was conducted for the assessment of in-built systematic and random errors in the ExacTrac imaging system due to the software of Brainlab, on that basis; recommending a new quality control programme for ExacTrac imaging system. Methods A program was developed to compare the image dataset of real time anthropomorphic pelvic phantom using ExacTrac with the reference image dataset from computed tomography. Images were acquired 20 times in a day, on single sitting for 20 conjugative days. On the basic of these translational and rotational shifts, systematic and random errors were calculated that had arisen due to multiple time image acquisition and image registration between acquired and reference image dataset of the phantom. Results Random errors were found as 0·006 cm in right-left (Rt-Lt) direction, 0·008 cm in superior-inferior (Sup-Inf) direction and 0·012 cm in anterior-posterior (Ant-Post) direction. On this basic, margins were calculated using Van Herk formula; it was found that there were 0·02 cm inherent shift in Rt-Lt direction, 0·03 cm in Sup-Inf direction and 0·03 cm in Ant-Post direction. Conclusion This study concluded that there was inherent error in ExacTrac system which can be quantified and used as a quality assurance tool for the ExacTrac system." @default.
- W2613746616 created "2017-05-19" @default.
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- W2613746616 date "2017-05-09" @default.
- W2613746616 modified "2023-09-26" @default.
- W2613746616 title "Inherent uncertainty involved in six-dimensional shift determination in ExacTrac imaging system" @default.
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- W2613746616 doi "https://doi.org/10.1017/s1460396917000280" @default.
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