Automatic segmentation of thoracic and pelvic CT images for radiotherapy planning using implicit anatomic knowledge and organ-specific segmentation strategies - Haas, B; Coradi, T; Scholz, M; Kunz, P; Huber, M; Oppitz, U; AndrÉ, L; Lengkeek, V; Huyskens, D; van Esch, A; Reddick, R (Phys Med Biol, 2008)