Fig. 2From: 4DCT and CBCT based PTV margin in Stereotactic Body Radiotherapy(SBRT) of non-small cell lung tumor adhered to chest wall or diaphragmPhase 0% of four-dimensional computed tomography (4DCT) image for an protocol NSCLC patient. (a) coronal (b) sagittal; Gross tumor volume (GTV) of phase 0Â % (GTV0%) in Red; Gross target volume (GTV) of phase 50Â % (GTV50%) in Green Back to article page