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Full-Text Articles in Social and Behavioral Sciences
Comparison Of Oncentra ® Brachy Ipsa And Graphical Optimisation Techniques: A Case Study Of Hdr Brachytherapy Head And Neck And Prostate Plans, Michael Jameson, Lucy Ohanessian, Vikneswary Batumalai, Virendra Patel, Lois C. Holloway
Comparison Of Oncentra ® Brachy Ipsa And Graphical Optimisation Techniques: A Case Study Of Hdr Brachytherapy Head And Neck And Prostate Plans, Michael Jameson, Lucy Ohanessian, Vikneswary Batumalai, Virendra Patel, Lois C. Holloway
Faculty of Engineering and Information Sciences - Papers: Part A
There are a number of different dwell positions and time optimisation options available in the Oncentra® Brachy (Elekta Brachytherapy Solutions, Veenendaal, The Netherlands) brachytherapy treatment planning system. The purpose of this case study was to compare graphical (GRO) and inverse planning by simulated annealing (IPSA) optimisation techniques for interstitial head and neck (HN) and prostate plans considering dosimetry, modelled radiobiology outcome and planning time. Four retrospective brachytherapy patients were chosen for this study, two recurrent HN and two prostatic boosts. Manual GRO and IPSA plans were generated for each patient. Plans were compared using dose-volume histograms (DVH) and dose …
On The Uniqueness Of Lp-Minkowski Problems: The Constant P-Curvature Case In R^3, Yong Huang, Jiakun Liu, Lu Xu
On The Uniqueness Of Lp-Minkowski Problems: The Constant P-Curvature Case In R^3, Yong Huang, Jiakun Liu, Lu Xu
Faculty of Engineering and Information Sciences - Papers: Part A
We study the C4 smooth convex bodies K ⊂Rn+1 satisfying K(x) =u(x)1−p, where x ∈Sn, K is the Gauss curvature of ∂K, u is the support function of K, and p is a constant. In the case of n =2, either when p ∈[−1, 0] or when p ∈(0, 1) in addition to a pinching condition, we show that K must be the unit ball. This partially answers a conjecture of Lutwak, Yang, and Zhang about the uniqueness of the Lp-Minkowski problem in R3. Moreover, we give an explicit pinching constant depending only on p when p ∈(0, 1).