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. 2014 Feb 28;9(2):e90327. doi: 10.1371/journal.pone.0090327

Figure 4. Typical hepatic attenuation difference seen on six months after SBRT.

Figure 4

(A) The isodose curve for SBRT depicts the planning target volume (PTV, purple circle) as well as the gross tumor volume (red circle) for the treatment of hepatocelluar carcinoma in left lobe of the liver. The total radiation dose for this patient was 45 Gy. The irradiated hepatic parenchyma is delineated corresponding to the region inside the 15-Gy isodose line but outside the PTV boundary. (B-E) Irradiated hepatic parenchyma appears as low attenuation (arrows) on noncontrast CT (B) and as high attenuation on the arterial (C), portal (D), and delayed (E) phase, respectively.