Kilovoltage x-ray dosimetry—an experimental comparison between different dosimetry protocols

Abstract

Kilovoltage x-ray dosimetry-an experimental Comparison 2 between different dosimetry protocols

The Bland–Altman analysis: Does it have a role in assessing radiation dosimeter performance relative to an established standard?

“…A number of studies performed since the publication of the BJR Report 25 have identified differences in measured versus predicted local doses of up to 6% for lower energy x-rays, which is consistent with our results (Evans et al, 2001;Jurado et al, 2005). However for kilovoltage x-ray beams with energy greater than 120 kVp, the agreement between measured data and BJR Report 25 data was better than 2% in the region from the surface to 2 cm depth (Munck Af Rosenschold et al, 2008). It should be noted that the BJR Report 25 data for the higher energy kilovoltage x-ray beams is only presented for an SSD of 50 cm, and so cannot be used for direct comparison for applicators with a smaller SSD (Jurado et al, 2005).…”

Comparison and uncertainty evaluation of different calibration protocols and ionization chambers for low‐energy surface brachytherapy dosimetry

“…11 Several calibration protocols have been published for x-ray dosimetry, recommending fundamentally different media in which measurements shall be performed. 12 Calibration factors for the reference dosimeters can be provided in terms of either air kerma or absorbed dose to water, depending on medium in which dose measurements are performed. Currently, the American Association of Physicists in Medicine (AAPM) Task Group 61 (TG-61) recommendations 13 (based on air kerma) and the International Atomic Energy Agency (IAEA) TRS-398 code of practice 14 (based on absorbed dose to water) are the most extended and frequently used protocols for lowenergy x-ray beam dosimetry.…”

The measurement of backscatter factors of kilovoltage X-ray beams using Gafchromic™ EBT2 film

“…However it has been noted that the use of generic published B W may increase the uncertainties involved in dosimetry, particularly for the higher-energy X-ray beams and may vary for different treatment units [7,22]. Therefore equipment-specific experimental verification of tabulated values are desirable for clinical use and may increase the accuracy of both reference and relative dosimetry measurements [22].…”

“…Therefore equipment-specific experimental verification of tabulated values are desirable for clinical use and may increase the accuracy of both reference and relative dosimetry measurements [22].…”