Imaging-guided adaptive radiation therapy in limited-stage small cell lung cancer: Current evidence and clinical perspectives

Table 2 Imaging platforms supporting adaptive radiation therapy: Practical roles and translational positioning in limited-stage small cell lung cancer

Imaging platform	Primary adaptive function	Major strength	Comment
Planning CT	Baseline geometry and dose calculation	Standardized anatomical definition	Standard for treatment simulation
Repeat CT Simulation	Offline adaptive replanning	High anatomical fidelity	Used for offline ART
4D-CT	Motion reassessment	Respiratory characterization	Used for motion assessment
Cone-beam CT	Longitudinal anatomical surveillance	Integrated into routine delivery	Used for IGRT and trigger detection/surveillance

CT: Computed tomography; 4D-CT: Four-dimensional computed tomography; ART: Adaptive radiation therapy; IGRT: Image guided radiation therapy.