Characterization of noise and digitizer response variability in radiochromic film dosimetry. Impact on treatment verification |
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| Affiliation: | 1. Department of Psychology, University of Maryland, Baltimore County, United States;2. Department of Psychiatry, Harvard Medical School, Beth Israel Deaconess Medical Center, United States;3. Department of Psychiatry, Amager Hospital, Copenhagen University Hospital, Capital Region of Denmark, Denmark;4. Institute of Public Health, Center for Healthy Aging, University of Copenhagen, Denmark;5. University of Hawaii, United States;6. Institute of Preventive Medicine, Copenhagen University Hospital, Denmark;7. University of Southern California, United States;1. Program in Biomedical Radiation Sciences, Department of Transdisciplinary Studies, Seoul National University Graduates School of Convergence Science and Technology, Seoul, Republic of Korea;2. Biomedical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea;3. Department of Radiation Oncology, Seoul National University Hospital, Seoul, Republic of Korea;4. Institute of Radiation Medicine, Seoul National University Medical Research Center, Seoul, Republic of Korea;5. Center for Convergence Research on Robotics, Advanced Institutes of Convergence Technology, Suwon, Republic of Korea;6. Interdisciplinary Program in Radiation Applied Life Science, Seoul National University College of Medicine, Seoul, Republic of Korea;1. Hospital Universitario Virgen de la Arrixaca, ctra. Madrid-Cartagena s/n, 30120 El Palmar (Murcia), Spain;2. Departamento de Tecnologías de la Información y las Comunicaciones, Universidad Politéctnica de Cartagena, Cartagena, Spain |
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| Abstract: | PurposeTo study how noise and scanner response variability affect radiochromic film dosimetry.MethodsFive treatment plans were analyzed in this work with two different multichannel protocols: the multichannel algorithm of Mayer et al. and the efficient protocol of Lewis et al.Results and conclusionThe multichannel protocol of Mayer et al. is not able to compensate variability in scanner response, which is an important issue for radiochromic film dosimetry. The efficient protocol compensates variations of scanner response, so dose values and gamma scores become more accurate and reproducible. The compensation of digitizer scan variability of the efficient protocol, together with time averaging improve radiochromic film dosimetry. Noise is related to selected resolution in the scanner, our results show that if high resolution measurements are required, de-noising should be considered. |
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| Keywords: | Radiochromic Film dosimetry Scanner response Noise |
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