Hepatocellular carcinoma treated with transarterial chemoembolization: Dynamic perfusion-CT in the assessment of residual tumor

Figure 1 A 69-year-old man with Child A liver cirrhosis and 12 mm lesion of hepatocellular carcinoma, treated with transarterial chemoembolization, in the seventh segment of the liver that underwent computed tomography-perfusion study. A: Multiphasic multidetector computed tomography scan image shows two hand drawn regions of interest (ROIs): T1 positioned on the successfully treated tumor contouring the treated area; T3 positioned on the surrounding liver parenchyma avoiding vessel structures, in order to obtain the quantitative perfusion data of the regions; B: Functional arterial perfusion colour map shows an homogenous distribution of perfusion area, with decreased perfusion range of colors compared with the background liver parenchyma; ROIs were positioned at the same level, on the successfully treated tumor (T1) and on the surrounding liver parenchyma (T3); C: Post chemoembolization digital fluoroscopic image obtained in the same patient shows excellent distribution of the lipiodol-chemotherapy mixture (arrow).