title: Dynamic contrast-enhanced CT imaging of hepatocellular carcinoma in cirrhosis: feasibility of a prolonged dual-phase imaging protocol with tracer kinetics modeling.
abstract: 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.
authors.affiliation: School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, Singapore.
authors.forename: Tong San
authors.initials: TS
authors.lastname: Koh
authors.forename: Choon Hua
authors.initials: CH
authors.lastname: Thng
authors.forename: Septian
authors.initials: S
authors.lastname: Hartono
authors.forename: Puor Sherng
authors.initials: PS
authors.lastname: Lee
authors.forename: Su Pin
authors.initials: SP
authors.lastname: Choo
authors.forename: Donald Y H
authors.initials: DY
authors.lastname: Poon
authors.forename: Han Chong
authors.initials: HC
authors.lastname: Toh
authors.forename: Sotirios
authors.initials: S
authors.lastname: Bisdas
mesh_terms: 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*
chemical_list: D003287:Contrast Media; D019275:Radiopharmaceuticals