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Fig. 4 | Cancer Imaging

Fig. 4

From: CT patterns and serial CT Changes in lung Cancer patients post stereotactic body radiotherapy (SBRT)

Fig. 4

SBRT-treated lung cancer continues to decrease in size at 19 months: a) Isodose multiplanar images for planning. b) Pre-SBRT CT shows a part-solid nodule. c) 6 mo post-SBRT the size is stable, however the nodule is denser and there is surrounding focal peribronchial consolidation away from the nodule. d, e) 10 mo post-SBRT there is decrease in size of the primary lesion and development of homogeneously thick curvilinear density at a radius away from the center of the nodule in keeping with the “orbit-sign” (d). f) 19 mo post-SBRT there is further decrease in size of the primary lesion and mild shrinkage of the surrounding “orbit-sign”

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