Por�wnanie rozk??adu dawki w obj??to??ci PTV przy zastosowaniu bolusa wodnego, gumowego i ?elowego
Author(s): K Patyra, M Mazurkiewicz
Introduction: A comparison of the distributions of the doses in 95% and 100% of planning target volume (PTV) with use of either rubber or jelly or water bolus was made in the study. Water bolus was attached to a fixing frame. Rubber and jelly boluses were fixed typically.
Material and methods: The study involved 23 patients scheduled for radical radiotherapy in the Dept. of Radiotherapy, The Lublin Lands’ Center of Oncology between December 2007 – March 2008. Each patient had a CT imaging of the planned -to-treat region performed with three types of the bolus. The PTV regions were then marked on the CT images and consequently loaded to the radiation planning system. The evaluation of dose distribution in PTV was done with an analysis of the dose histograms of each bolus.
Results: Using a jelly bolus 83% of the planned dose was available in 95% volume of PTV, rubber bolus allowed for 87% of the planned dose in 95% volume of PTV, while application of water bolus gave 98% of the planned dose in 95% volume of PTV.
Conclusions: Application of water bolus in radiotherapy of the head and neck region allows to achieve a significantly higher homogeneity of the dose in both 95% and 100% volume of PTV, in comparison to rubber and jelly boluses.<
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Prof. Elhadi Miskeen
Obstetrics and Gynaecology Faculty of Medicine, University of Bisha, Saudi Arabia
Ahmed Hussien Alshewered
University of Basrah College of Medicine, Iraq
Department of Electronics and Communication Engineering SRM University – AP, Andhra Pradesh
Supervisor of Biochemistry Lab and PhD. students of Faculty of Science, Department of Chemistry and Department of Chemis
Fava Maria Giovanna
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