Calculation of the Beam-Modulation Effect of the Lung in Carbon Ion and Proton Therapy With Deterministic Pencil Beam Algorithms - Ringbæk, Toke Printz; Santiago, Alina; Grzanka, Leszek; Baumann, Kilian; Flatten, Veronika; Engenhart-Cabillic, Rita; Bassler, Niels; Zink, Klemens; Weber, Uli (Frontiers in Physics, 2020)