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Beyond the linear quadratic model: intraoperative radiotherapy and normal tissue tolerance

  
@article{TCR4270,
	author = {Bahman Emami and Gayle Woloschak and William Small Jr},
	title = {Beyond the linear quadratic model: intraoperative radiotherapy and normal tissue tolerance},
	journal = {Translational Cancer Research},
	volume = {4},
	number = {2},
	year = {2015},
	keywords = {},
	abstract = {Purpose: In recent years increasing number of patients are treated with intraoperative, high dose-low energy radiotherapy. The purpose of this review is to evaluate whether the linear-quadratic model (L-Q model) is appropriate for predictive modeling and relative biological effectiveness (RBE) calculations of this new radiation. 
Methods: All pertinent literature addressing radiobiological aspects of L-Q formulism on high dose-high energy hypofractions [including one fraction intraoperative radiotherapy (IORT)] and high dose-low energy radiation was reviewed and analyzed with regard to clinical utility. 
Results: Due to the lack of inclusion and experimental verification of a significant number of factors, biological (i.e., no SLD repair, no cell repopulation between fractions, no reoxygenation, long delivery time and steeper dose fall off which affects RBE)/physiological and systemic (i.e., effects on immune systems), which impact on the effectiveness of high dose-low energy radiation, would make the L-Q model inappropriate for predictive modeling of normal tissue complications. 
Conclusions: L-Q model is inappropriate to model biological effect of either high dose-high energy or high dose-low energy radiation.},
	issn = {2219-6803},	url = {http://tcr.amegroups.com/article/view/4270}
}