Evaluating the utility of simulated respiratory-gated four-dimensional computed tomography in internal-target-volume-based treatment planning for irregular breathing patterns. - Hinai S; Usui K; Obara Y; Maebayashi T; Ookubo S; Ichikawa A; Sasaki Y; Sakamoto H; Kyogoku S; Daida H (Radiological physics and technology, 2026)