The quest for sensible data analysis in clinical routine: Study case on the new Octavius1500 array and its associated phantoms

8th International Conference on 3D Radiation Dosimetry

Van Esch, Ann^1,2 ; Huyskens, Dominique P.^1,2 ; Basta, K.^2 ; Ghislain, M.^2 ; Delvaux, R.^2

7Sigma, QA-team in Radiotherapy Physics, Kasteeldreef 2, Tildonk

3150, Belgium^1

Radiotherapy Association, Centre Hospitalier Mouscron, Ste Elisabeth Namur, 7700, Mouscron-Namur

5000, Belgium^2

关键词: Acceptance criteria;    Clinical routine;    Evaluation criteria;    Gamma analysis;    Measurement system;    Measurement uncertainty;    Study case;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/573/1/012007/pdf
DOI  :  10.1088/1742-6596/573/1/012007

来源: IOP

【 摘 要 】

We have investigated the dosimetric characteristics of the new Octavius1500 array and its associated phantoms (Oct2D and Oct4D) and compared it to the previous systems. In line with the rising amount of publications advocating the retirement of the widely used but overly lenient 3%, 3mm (global dose) gamma analysis criteria, we have also focused on deriving appropriate evaluation criteria to be used with the new measurement systems in clinical routine. Using the Octavius1500 study as an example, we advocate the use of more selective, equipment specific gamma criteria, all starting from the same, very strict acceptance criteria but adding measurement uncertainty to these.