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Africa Gets Spectrum Resources for 18,326 New FM Channels

Africa Gets Spectrum Resources for 18,326 New FM Channels
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Sharm El Sheikh , Janub Sina , United Arab Emirates , Telecommunications Unions , Southern African Development Community , Broadcasting Satellite Service , Radiocommunications Bureau , Sustainable Development Goal , World Radiocommunications Conference , Plan Optimization , African Administrations , Regulations Board , Member State , Radio Regulations ,

"Development of an automated treatment planning approach for lattice ra" by Mathieu Gaudreault, David Chang et al.

Background: Lattice radiation therapy (LRT) alternates regions of high and low doses within the target. The heterogeneous dose distribution is delivered to a geometrical structure of vertices segmented inside the tumor. LRT is typically used to treat patients with large tumor volumes with cytoreduction intent. Due to the geometric complexity of the target volume and the required dose distribution, LRT treatment planning demands additional resources, which may limit clinical integration. Purpose: We introduce a fully automated method to (1) generate an ordered lattice of vertices with various sizes and center-to-center distances and (2) perform dose optimization and calculation. We aim to report the dosimetry associated with these lattices to help clinical decision-making. Methods: Sarcoma cancer patients with tumor volume between 100 cm3 and 1500 cm3 who received radiotherapy treatment between 2010 and 2018 at our institution were considered for inclusion. Automated segmentation and do ....

United States , Varian Medical Systems , Palo Alto , Plan Optimization ,