Contrast agent Gd-EOB-DTPA (EOB·Primovist®) for low-field magnetic resonance imaging of canine focal liver lesions

Vet Radiol Ultrasound. Jul-Aug 2012;53(4):371-80. doi: 10.1111/j.1740-8261.2011.01919.x. Epub 2012 May 1.

Abstract

Contrast-enhanced magnetic resonance (MR) imaging with a new liver-specific contrast agent gadolinium-ethoxybenzyl-diethylenetriamine penta-acetic acid (Gd-EOB-DTPA; EOB·Primovist®) was studied in 14 normal beagles and 9 dogs with focal liver lesions. Gd-EOB-DTPA accumulates in normally functioning hepatocytes 20 min after injection. As with Gd-DTPA, it is also possible to perform a dynamic multiphasic examination of the liver with Gd-EOB-DTPA, including an arterial phase and a portal venous phase. First, a reliable protocol was developed and the appropriate timings for the dynamic study and the parenchymal phase in normal dogs using Gd-EOB-DTPA were determined. Second, the patterns of these images were evaluated in patient dogs with hepatic masses. The optimal time of arterial imaging was from 15 s after injection, and the optimal time for portal venous imaging was from 40 s after injection. Meanwhile, the optimal time to observe changes during the hepatobiliary phase was from 20 min after injection. In patient dogs, 11 lesions were diagnosed as malignant tumors; all were hypointense to the surrounding normal liver parenchyma during the hepatobiliary phase. Even with a low-field MR imaging unit, the sequences afforded images adequate to visualize the liver parenchyma and to detect tumors within an appropriate scan time. Contrast-enhanced MR imaging with Gd-EOB-DTPA provides good demarcation on low-field MR imaging for diagnosing canine focal liver lesions.

MeSH terms

  • Animals
  • Contrast Media*
  • Dog Diseases / diagnosis*
  • Dogs
  • Female
  • Focal Nodular Hyperplasia / diagnosis
  • Focal Nodular Hyperplasia / veterinary*
  • Gadolinium DTPA*
  • Liver / pathology*
  • Liver Neoplasms / diagnosis
  • Liver Neoplasms / veterinary*
  • Magnetic Resonance Imaging / veterinary*
  • Male

Substances

  • Contrast Media
  • gadolinium ethoxybenzyl DTPA
  • Gadolinium DTPA