Clinical management of tumour volume changes in VMAT head & neck radiation treatment

9th International Conference on 3D Radiation Dosimetry

Alexander, K.M.^1 ; Gooding, J.^2 ; Schreiner, L.J.^1,2 ; Olding, T.^1,2

Department of Physics, Queen's University, Kingston

ON

K7L 3N6, Canada^1

Cancer Centre of South Eastern Ontario, Kingston General Hospital, 25 King Street West, Kingston

ON

K7L 5P9, Canada^2

关键词: Body contours;    Clinical management;    Gel dosimeter;    Radiation treatments;    Variable sizes;    Verification plans;    Volume change;    Xylenol Orange;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/847/1/012038/pdf
DOI  :  10.1088/1742-6596/847/1/012038

来源: IOP

【 摘 要 】

The impact of changing anatomy due to tumour shrinkage was assessed for a VMAT head & neck plan optimized according to our centre's planning protocol. A custom-built wax phantom accommodating ion chamber, MOSFET, EBT3 film and Fricke-xylenol orange-gelatin (FXG) gel dosimeters and a variable size bolus 'tumour' was used in the investigation. Results indicate that the practice of initiating a patient re-scan and verification plan is appropriate when a change in external body contour greater than 1 cm compared to the original anatomy is observed.