Journal
VETERINARY RADIOLOGY & ULTRASOUND
Volume 51, Issue 1, Pages 79-85Publisher
WILEY
DOI: 10.1111/j.1740-8261.2009.01627.x
Keywords
contrast; dog; liver; Sonazoid (R); tumor; ultrasonography
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In six normal beagles and 27 dogs with spontaneous focal or multifocal liver lesions, contrast-enhanced ultrasonography using Sonazoid (R) was performed. Sonazoid (R) is a newly developed second-generation contrast agent with the ability to be used for real-time contrast imaging along with parenchymal imaging. An appropriate protocol for the evaluation of all three phases (arterial, portal, and parenchymal) was established based on the results for normal beagles. By evaluation of the echogenicity of hepatic nodules during the arterial and parenchymal phases it was possible to differentiate malignant tumors from benign nodules with very high accuracy. In 15 of 16 dogs diagnosed as malignant tumors, nodules were clearly hypoechoic to the surrounding normal liver during the parenchymal phase. Additionally, malignant tumors had different echogenicity compared with the surrounding normal liver during the arterial phase in 14 of 15 dogs. In the portal phase, there were no characteristic findings. Contrast-enhanced ultrasonography with Sonazoid (R) appears to improve the characterization of canine focal and multifocal hepatic lesions.
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