PCA-Based Identification of Soft Tissue Regions with Irradiation-Induced CT-Density Changes for Image-Guided Radiotherapy. - Greta Karpaviciene; Algimantas Krisciukaitis; Reda Cerapaite-Trusinskiene; Robertas Petrolis; Diana Meilutyte-Lukauskiene; Renata Paukstaitiene (BIOSTEC (2), 2026)