ESTRO 2025 - Abstract Book

S1407

Clinical - Lung

ESTRO 2025

Results: Minimum availability of one target per patient resulted in GTV p (CTV n ) evaluations in 15 (10) patients, while OARs were evaluated in all 20 patients. In total, 2520 visibility scores were collected. Compared to CBCT C , mean visibility scores for CBCT H increased significantly (p<0.05) from 3.1 to 3.3 for GTV p , from 2.5 to 2.7 for CTV n , from 2.6 to 2.8 for esophagus, from 3.1 to 3.3 for heart, from 3.3 to 3.6 for aortic arch and from 2.1 to 2.8 for brachial plexus. Mean ART suitability score increased from 2.6 for CBCT C to 2.9 for CBCT H . Figure 2 shows patient-averaged differences in structure visibility scores and ART suitability scores.