Dynamic contrast-enhanced CT imaging of hepatocellular carcinoma in cirrhosis: feasibility of a prolonged dual-phase imaging protocol with tracer kinetics modeling.
Dynamic contrast-enhanced (DCE) CT imaging of four patients with hepatocellular carcinoma (HCC) was performed using a dual-phase imaging protocol designed with initial rapid dynamic imaging to capture the initial increase in contrast medium enhancement in order to assess perfusion, followed by a delayed imaging phase with progressively longer intervals to monitor subsequent tissue enhancement behaviour in order to assess tissue permeability. The DCE CT images were analysed using a dual-input two-compartment distributed parameter model to yield separate estimates for blood flow and permeability, as well as fractional intravascular and extravascular volumes. The HCCs and surrounding cirrhotic liver tissues were found to exhibit enhancement curves that can be appropriately described by two distinct compartments separated by a semipermeable barrier. Early contrast arrival was also found for HCC as compared with background liver. These findings are consistent with the current understanding of sinusoidal capillarization and hepatocarcinogenesis.
Koh
Tong San
TS
School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, Singapore.
Thng
Choon Hua
CH
Hartono
Septian
S
Lee
Puor Sherng
PS
Choo
Su Pin
SP
Poon
Donald Y H
DY
Toh
Han Chong
HC
Bisdas
Sotirios
S
D000368:Aged; D006528:Carcinoma, Hepatocellular / Q000150:complications / Q000175:diagnosis* / Q000000981:diagnostic imaging*; D003287:Contrast Media / Q000494:pharmacology*; D005260:Female; D005355:Fibrosis / Q000150:complications* / Q000000981:diagnostic imaging; D006801:Humans; D007700:Kinetics; D008099:Liver / Q000000981:diagnostic imaging / Q000473:pathology; D008113:Liver Neoplasms / Q000150:complications / Q000175:diagnosis* / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D015233:Models, Statistical; D008962:Models, Theoretical; D019275:Radiopharmaceuticals; D014057:Tomography, X-Ray Computed / Q000379:methods*
D003287:Contrast Media; D019275:Radiopharmaceuticals