Optimal phases of dynamic CT for detecting hepatocellular carcinoma: evaluation of unenhanced and triple-phase images

Abstract

The combination of the arterial- and late-phase imagings was best for detecting HCC nodules.

A long-term follow-up study on hepatitis B surface antigen–positive patients undergoing allogeneic hematopoietic stem cell transplantation

“…The diagnosis of HCC was made histologically or was based on image findings (including ultrasonography, computerized tomography, and arteriography) consistent with HCC, plus an ␣-fetoprotein level greater than 400 ng/mL. [24][25][26][27][28] This study was approved by the Institutional Review Board of the Queen Mary Hospital. Informed consent was obtained from all donors and recipients for their recruitment into the study.…”

Characterization of Hepatocellular Carcinoma Using CT Intensity and K-means

“…giving mean intensity (111 HU) which is lower than the other organs and relative to surrounding liver parenchyma; and during the arterial phase HCC intensity value reached the maximum enhancement with mean intensity of (146 HU), but it is still lower than the surrounding normal liver parenchyma, therefore the tumor appear as hypo-attenuating as shown in Figure (3, 4), while during the venous phase the intensity of the tumor were decreased and clearly washout as detected with mean intensity of (137 HU). In contrast the intensity of surrounding normal liver tissue were increased during the hepatic arterial phase showing the plateau at (172.1 HU) and decreased to (158 HU) in venous phase as shown in Figure (4), such phenomena has been ascribed to intra-lesions enhancement of the contrast medium during the arterial phase [21,22] which in turn related to the differences in blood supply.…”

Multiphase helical CT findings after percutaneous ablation procedures for hepatocellular carcinoma

“…Contrast-enhanced helical CT has gained a central role in the detection, staging, and posttreatment evaluation of HCC [6,[23][24][25][26]. It allows rapid scanning of the entire liver during the various phases of contrast enhancement, thereby providing information about the changes within the treated nodule and the surrounding parenchyma.…”