نتایج جستجو برای: dose inhomogenity
تعداد نتایج: 310292 فیلتر نتایج به سال:
Introduction: The complex geometry of breast and also lung and heart inhomogeneities near the planning target volume (PTV) result in perturbations in dose distribution. This problem can result in overdosage or underdosage in the match region of the three treatment fields. The purpose of this study is to create a homogeneous dose distribution in the match region between the supraclavicular and t...
SUMMARY In this paper we derive error bounds for a collocation-grid-projection scheme tuned for use in multilevel methods for solving boundary-element discretizations of potential integral equations. The grid-projection scheme is then combined with a precorrected-FFT style multilevel method for solving potential integral equations with 1 r and e ikr =r kernels. A complexity analysis of this com...
Preface This monograph gives a general geometric background of the theory of field interactions, strings and diffusion processes on spaces, superspaces and isospaces with higher order anisotropy and inhomogenity. The last fifteen years have been attempted a number of extensions of Finsler geometry with applications in theoretical and mathematical physics and biology which go far beyond the orig...
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