1. D’Onofrio M, Rozzanigo U, Caffarri S, et al. (2004) Contrast-enhanced US of hepatocellular carcinoma. Radiol Med 107:293–303
2. Quaia E, Stacul F, Gaiani S, et al. (2004) Comparison of diagnostic performance of unenhanced vs SonoVue-enhanced ultrasonography in focal liver lesions characterization. The experience of three Italian centers. Radiol Med 108:71–81
3. Quaia E, Degobbis F, Tona G, et al. (2004) Differential patterns of contrast enhancement in different focal liver lesions after injection of the microbubble US contrast agent SonoVue. Radiol Med 107:155–165
4. D’Onofrio M, Mansueto G, Falconi M, Procacci C (2004) Neuroendocrine pancreatic tumor: value of contrast enhanced ultrasonography. Abdom Imaging 29:246–258
5. Cosgrove D (2004) Advances in contrast agent imaging using Cadence contrast pulse sequencing technology (CPS) and SonoVue. Eur Rad 14(Suppl 8)