AUTHOR=Ringbæk Toke Printz , Santiago Alina , Grzanka Leszek , Baumann Kilian , Flatten Veronika , Engenhart-Cabillic Rita , Bassler Niels , Zink Klemens , Weber Uli TITLE=Calculation of the Beam-Modulation Effect of the Lung in Carbon Ion and Proton Therapy With Deterministic Pencil Beam Algorithms JOURNAL=Frontiers in Physics VOLUME=8 YEAR=2020 URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2020.568176 DOI=10.3389/fphy.2020.568176 ISSN=2296-424X