ITV versus mid-ventilation for treatment planning in lung SBRT: a comparison of target coverage and PTV adequacy by using in-treatment 4D cone beam CT

摘要

Systematic (Σ) and random (σ) target localization errors of the patient group and related dose-probability-based PTV margins calculated for the MidV approach. Baseline error refers to the residual localization error of the mean time-weighted target position. Iso error refers to the error related to the nonperfect coincidence between imaging and treatment isocenters. MidV error refers to the residual error of localizing the mean time-weighted target position in the MidV CT dataset