title: Computed tomography during arterial portography under temporary balloon occlusion of the hepatic artery: evaluation of pseudolesions caused by arterio-portal venous shunts.
abstract: BACKGROUND
  Computed tomography during arterial portography (CTAP) under temporary balloon occlusion of the hepatic artery (BOHA-CTAP) was introduced to evaluate pseudolesions caused by portal venous impairments such as arterioportal shunt and tumor thrombus.
  
  
  METHODS
  BOHA-CTAP was performed in seven patients with hepatocellular carcinoma and correlated with clinical outcomes. For patients with wedge-shaped defects suggestive of pseudolesions, BOHA-CTAP was obtained by a 5-F balloon occlusion catheter into the proper hepatic artery through the second 5-F introducer inserted into the common femoral artery a few centimeters below the first 5-F sheath for CTAP.
  
  
  RESULTS
  Eight pseudolesions were determined clinically on follow-up CT, ultrasonography, or magnetic resonance imagings. On BOHA-CTAP, five of the eight pseudolesions were eliminated, and two were diminished in comparision with conventional CTAP. One wedge-shaped defect due to tumor thrombus in the portal vein did not show any change.
  
  
  CONCLUSIONS
  BOHA-CTAP can reduce pseudolesions caused by portal venous impairments and enable the demarcation of the true tumors.
authors.affiliation: Department of Diagnostic Radiology, School of Medicine, Keio University, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan.
authors.forename: J
authors.initials: J
authors.lastname: Koizumi
authors.forename: T
authors.initials: T
authors.lastname: Kurata
authors.forename: T
authors.initials: T
authors.lastname: Yamashita
authors.forename: M
authors.initials: M
authors.lastname: Kominami
authors.forename: H
authors.initials: H
authors.lastname: Fujiwara
authors.forename: Y
authors.initials: Y
authors.lastname: Narimatsu
authors.forename: K
authors.initials: K
authors.lastname: Hiramatsu
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D021721:Balloon Occlusion; D006528:Carcinoma, Hepatocellular / Q000000981:diagnostic imaging*; D003937:Diagnosis, Differential; D005260:Female; D006499:Hepatic Artery / Q000000981:diagnostic imaging; D006801:Humans; D008102:Liver Circulation; D008113:Liver Neoplasms / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D011169:Portal Vein / Q000000981:diagnostic imaging; D011172:Portography; D014057:Tomography, X-Ray Computed; D020246:Venous Thrombosis / Q000000981:diagnostic imaging