title: [Basic and clinical studies of visualizing right inferior phrenic artery by multi detector row-CT].
abstract: To perform transcatheter arterial embolization (TAE) successfully, it is important to obtain information about parasitic arterial supply to the hepatocellular carcinoma (HCC). Among these extrahepatic collateral vessels, the right inferior phrenic artery (RIPA) is the most frequent and important extrahepatic collateral artery supplying the HCC. In the present study, we obtained multi-planar reformation (MPR) images of RIPA using multi detector row computed tomography (MDCT), assessed the ability of MDCT to demonstrate the origin of RIPA, and then analyzed the morphology of the origin. In a basic study using an original phantom simulating vessel origin, the origin was poorly visualized depending on the phantom diameter and angle of the origin to the scanned section. A clinical study was performed in 28 patients with HCC who underwent both MDCT and angiography within a short period. In 19 of 28 patients, RIPA originated at the celiac artery. In 3 patients, RIPA originated at the right renal artery, and in 6, directly at the abdominal aorta. The origin of RIPA was categorized into four patterns according to the inclination of the origin on transverse sections of MDCT. RIPA that originated at the right renal artery and showed an upward course perpendicular to the scan section of MDCT were most clearly visualized at the origin. In addition, RIPA could be observed in an optional direction on the workstation. Pre-angiographic visualization of the origin of RIPA may save angiographic time, curtail contrast medium, and reduce radiation exposure.
authors.affiliation: Department of Radiological Technology, Ishikawaken Saiseikai Kanazawa Hospital.
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Okumura
authors.forename: Masayuki
authors.initials: M
authors.lastname: Suzuki
authors.forename: Akihiro
authors.initials: A
authors.lastname: Takemura
authors.forename: Tadanori
authors.initials: T
authors.lastname: Takada
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Kawahara
authors.forename: Yukihiro
authors.initials: Y
authors.lastname: Matsuura
authors.forename: Osamu
authors.initials: O
authors.lastname: Matsui
authors.forename: Shiro
authors.initials: S
authors.lastname: Takahashi
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D006528:Carcinoma, Hepatocellular / Q000098:blood supply*; D003097:Collateral Circulation; D004621:Embolization, Therapeutic; D005260:Female; D006801:Humans; D008113:Liver Neoplasms / Q000098:blood supply*; D008297:Male; D008875:Middle Aged; D019047:Phantoms, Imaging; D014057:Tomography, X-Ray Computed