PURPOSE: Bronchoscopic thermal vapor ablation (BTVA) is a minimally invasive treatment for severe emphysema. However, the treatment doses are typically generated at the segmental level. In specific cases, treatment needs to be conducted at the subsegmental level, and the proportion can only be roughly allocated based on CT image review, potentially leading to dose mismatch. This retrospective exploratory study investigated the relationship between subsegmental dose accuracy (theoretical-to-actual matching) and clinical outcomes following BTVA. METHODS: Patients who underwent BTVA at the Shanghai Chest Hospital between 2023 and 2024 were analyzed. Subsegmental theoretical doses (BroncQCT software) were compared to previously administered actual treatment doses. Dose matching was defined as: 1) segmental treatments were presumed matched (uniform vapor assumption), 2) subsegmental treatments required
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