MULTIPHASE TIME-RESOLVED CONTRAST-ENHANCED PORTAL MRA IN NORMAL DOGS
Article first published online: 23 DEC 2008
© 2009 American College of Veterinary Radiology
Veterinary Radiology & Ultrasound
Volume 50, Issue 1, pages 52–57, January/February 2009
How to Cite
MAI, W. (2009), MULTIPHASE TIME-RESOLVED CONTRAST-ENHANCED PORTAL MRA IN NORMAL DOGS. Veterinary Radiology & Ultrasound, 50: 52–57. doi: 10.1111/j.1740-8261.2008.01489.x
- Issue published online: 23 DEC 2008
- Article first published online: 23 DEC 2008
- Received May 18, 2008; accepted for publication July 9, 2008.
- magnetic resonance angiography;
- parallel imaging;
- portal vein
Portal vein anomalies are common in dogs and cats. Diagnostic imaging is central in their diagnosis and fundamental with regard to choosing the best therapeutic option. Various imaging techniques are used in veterinary medicine to assess the portal vein. Each has individual advantages and disadvantages. Contrast-enhanced magnetic resonance angiography (CE-MRA) is used routinely in humans to image the portal system and has excellent spatial and temporal resolution and three-dimensional (3D) acquisition. Herein, we report the development of a CE-MRA protocol that resulted in fast 3D imaging of the arterial splanchnic and portal venous system in normal dogs. Multiphase acquisition strategy allowed acquiring the same volume several times during one single breath-hold, thereby capturing the portal venous phase with excellent signal. Excellent depiction of the vascular anatomy, especially the portal afferent vessels and branches, was observed. Elliptical centric view ordering of k-space was used to acquire the contrast-sensitive data faster. Parallel imaging was used to increase coverage in the dorsal to ventral direction while keeping imaging time short. It is anticipated that 3D CE-MRA is a fast and noninvasive imaging method that could be used to diagnose various portal vascular anomalies in small animals.