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On optimal treatment planning in radiotherapy governed by transport equations. (English) Zbl 1227.49006

Summary: This paper is devoted to the study of optimal control problems arising in radiotherapy planning problems. The distribution of the radiative intensity in the patient’s body is described by a Boltzmann-integro differential equation with position, angular and energy-dependent scattering and absorption coefficients and an energy loss term. The presented discussion is the last in the series of [M. Frank, M. Herty and A. N. Sandjo, Math. Models Methods Appl. Sci. 20, No. 4, 661–678 (2010; Zbl 1255.49007); M. Frank, M. Herty and M. Schäfer, Math. Models Methods Appl. Sci. 18, No. 4, 573–592 (2008; Zbl 1143.76058)] discussing radiotherapy problems using the Boltzmann transport equation. We show the existence, uniqueness and regularity of an optimal control using evolution group theory. We extend existing results in order to treat the important case of energy-dependent scattering coefficients.

MSC:

49J20 Existence theories for optimal control problems involving partial differential equations
35R09 Integro-partial differential equations
35Q20 Boltzmann equations
49N60 Regularity of solutions in optimal control
92C50 Medical applications (general)
Full Text: DOI

References:

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