CT Perfusion Imaging in Hepatocellular Carcinoma
Summary
CT perfusion imaging is an advanced functional technique that quantifies the vascular properties of hepatic tumours by evaluating dynamic changes in contrast enhancement. In the setting of hepatocellular carcinoma (HCC), it provides metrics of tumour perfusion that supplement conventional morphological assessment, offering insights into tumour angiogenesis, vascular density and response to locoregional therapies. By generating parametric maps of blood flow, blood volume, mean transit time and permeability, CT perfusion enables early detection of viable tumour tissue, differentiation from treatment-related changes and prediction of therapeutic outcome. This approach is particularly valuable in HCC, where the heterogeneous vascular supply and the background of cirrhosis can obscure conventional diagnostic signs.
Recent advances in scanner technology and post-processing algorithms have reduced acquisition time and radiation dose, while improving spatial and temporal resolution. Standardised protocols now facilitate reproducible quantification of perfusion parameters across centres. Clinically, CT perfusion has been applied to monitor responses to transarterial chemoembolization (TACE), drug-eluting bead therapies and radiofrequency ablation, revealing characteristic perfusion signatures of treatment success or failure. As HCC management moves towards personalised strategies, CT perfusion imaging is emerging as a practical tool for tailoring interventions, guiding biopsy, and prognosticating patient survival.
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CT Perfusion Imaging in Hepatocellular Carcinoma publication trend
The graph below shows the total number of articles in ct perfusion imaging in hepatocellular carcinoma across all publications each year (not limited to Nature Index journals).
Technical terms
CT perfusion imaging: Dynamic acquisition of CT images to quantify tissue vascularity based on contrast enhancement kinetics.
Blood flow (BF): The volume of blood passing through a given tissue mass per unit time, expressed in mL/100 g/min.
Blood volume (BV): The total volume of blood within a given tissue region, usually measured in mL/100 g.
Mean transit time (MTT): The average time taken for blood to traverse through the capillary network of a given tissue.
Permeability-surface area product (PS): A measure of capillary permeability and surface area, reflecting the rate at which contrast leaks into the interstitial space.
Arterial enhancement fraction (AEF): The ratio of arterial to total liver perfusion, indicating the proportion of blood supply to a lesion derived from the hepatic artery.
References
- Current Imaging Diagnosis of Hepatocellular Carcinoma. Cancers (2022).
- Arterial enhancement fraction in evaluating the therapeutic effect and survival for hepatocellular carcinoma patients treated with DEB-TACE. Cancer Imaging (2022).
- CT perfusion for response evaluation after interventional ablation of hepatocellular carcinoma: a prospective study. Egyptian Journal of Radiology and Nuclear Medicine (2021).
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