Fig. 1From: 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) transverse (b) sagittal (c) coronal; Gross tumor volume (GTV) of phase 0% in Red; Clinical target volume (CTV) of phase 0% in Green; Internal clinical target volume (ITV) in blue; Planning target volume (PTV) in Yellow Back to article page