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Journal Articles

A New Standard DNA Damage (SDD) data format

Schuemann, J.*; McNamara, A. L.*; Warmenhoven, J. W.*; Henthorn, N. T.*; Kirkby, K.*; Merchant, M. J.*; Ingram, S.*; Paganetti, H.*; Held, K. D.*; Ramos-Mendez, J.*; et al.

Radiation Research, 191(1), p.76 - 93, 2019/01

 Times Cited Count:45 Percentile:94.61(Biology)

We propose a new Standard DNA Damage (SDD) data format to unify the interface between the simulation of damage induction in DNA and the biological modelling of DNA repair processes, and introduce the effect of the environment (molecular oxygen or other compounds) as a flexible parameter. Such a standard greatly facilitates inter-model comparisons, providing an ideal environment to tease out model assumptions and identify persistent, underlying mechanisms. Through inter-model comparisons, this unified standard has the potential to greatly advance our understanding of the underlying mechanisms of radiation-induced DNA damage and the resulting observable biological effects when radiation parameters and/or environmental conditions change.

Journal Articles

Extension of TOPAS for the simulation of proton radiation effects considering molecular and cellular endpoints

Polster, L.*; Schuemann, J.*; Rinaldi, I.*; Burigo, L.*; McNamara, A. L.*; Steward, R. D.*; Attili, A.*; Carlson, D. J.*; Sato, Tatsuhiko; Ramos M$'e$ndez, J.*; et al.

Physics in Medicine & Biology, 60(13), p.5053 - 5070, 2015/07

 Times Cited Count:49 Percentile:90.82(Engineering, Biomedical)

The aim of this work is to extend a widely used proton Monte Carlo tool, TOPAS, towards the modeling of relative biological effect (RBE) distributions in experimental arrangements as well as patients. Then, eight biophysical models was incorporated into TOPAS. As far as physics parameters are concerned, four of these models are based on the proton linear energy transfer (LET), while the others are based on DNA Double Strand Break (DSB) induction and the frequency-mean specific energy, lineal energy, or delta electron generated track structure. The model on the basis of lineal energy adapted a microdosimetric function developed by JAEA. This work is an important step in bringing biologically optimized treatment planning for proton therapy closer to the clinical practice.

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