title: Visualization of tumor vessels in hepatocellular carcinoma. Power Doppler compared with color Doppler and angiography.
abstract: OBJECTIVE
  To assess the visualization of tumor vessels in hepatocellular carcinoma (HCC) by power Doppler sonography.
  
  
  METHODS
  We examined 40 patients with 47 HCC lesions by means of power Doppler sonography and compared its visualization of tumor vessels with those of color Doppler and angiography.
  
  
  RESULTS
  In 38 (81%) of the 47 lesions, power Doppler sonography improved the visualization of tumor vessels compared with color Doppler sonography; in the remaining lesions no significant difference was noted. In lesions located within 7 cm in depth, there was no significant difference between power Doppler sonography and angiography. In 10 (83%) out of 12 small (< or = 2 cm in diameter) lesions and in 11 (85%) out of 13 hypovascular lesions, power Doppler sonography performed considerably better than angiography. In deeper-seated lesions, however, angiography was significantly superior to power Doppler sonography.
  
  
  CONCLUSIONS
  Power Doppler sonography is more sensitive in detecting the fine tumor vessels in most HCCs than color Doppler sonography. In addition, power Doppler sonography can replace angiography in evaluating tumor vascularity in HCCs except in lesions that are deep-seated or located near the heart. In these lesions, angiography can complement power Doppler sonography in demonstrating tumor vessels.
authors.affiliation: Department of Radiology, Osaka National Hospital, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Hosoki
authors.forename: M
authors.initials: M
authors.lastname: Mitomo
authors.forename: S
authors.initials: S
authors.lastname: Chor
authors.forename: N
authors.initials: N
authors.lastname: Miyahara
authors.forename: M
authors.initials: M
authors.lastname: Ohtani
authors.forename: K
authors.initials: K
authors.lastname: Morimoto
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000792:Angiography; D001158:Arteries / Q000000981:diagnostic imaging; D002196:Capillaries / Q000000981:diagnostic imaging; D006528:Carcinoma, Hepatocellular / Q000098:blood supply* / Q000000981:diagnostic imaging / Q000473:pathology; D003287:Contrast Media; D005260:Female; D006801:Humans; D007089:Image Enhancement; D007479:Iopamidol; D008113:Liver Neoplasms / Q000098:blood supply* / Q000000981:diagnostic imaging / Q000473:pathology; D008297:Male; D008875:Middle Aged; D009389:Neovascularization, Pathologic / Q000000981:diagnostic imaging / Q000473:pathology; D018608:Ultrasonography, Doppler; D018615:Ultrasonography, Doppler, Color; D014680:Veins / Q000000981:diagnostic imaging
chemical_list: D003287:Contrast Media; D007479:Iopamidol