Detection of hepatic neoplasms by hepato-portal subtraction angiography

The authors developed a new angiographic technique using DSA (Hepato-Portal Subtraction Angiography; HPSA) based on both differences of blood flow in the hepatic artery and portal vein between the hepatic parenchyma and tumors. HPSA was performed in seven patients with hepatoma, four with metastatic tumor and two with hemangioma. HPSA provided better contrast between tumors and the liver parenchyma in comparison with the DSA performed with the superselective cathetelization to the proper or common hepatic artery. (author)