van der Heyden, B., Almeida, I. P., Vilches-Freixas, G., Van Beveren, C., Vaniqui, A., Ares, C., … Verhaegen, F. (2020). A comparison study between single- and dual-energy CT density extraction methods for neurological proton monte carlo treatment planning. Acta Oncologica, 59(2), 171–179. https://doi.org/10.1080/0284186X.2019.1679879