Two and Three Dimensional Color and Power Doppler Ultrasonography of the Ophthalmic Vasculature of the Normal Dog

Objective- to assess the feasibility and reproducibility of two and three dimensional color and power Doppler imaging of the vasculature of the normal canine orbit and eye. Design- descriptive study.Animals- 10 mixed breed mature dogs (6 female & 4 male) weighing 14.9±1.89 kg.Procedures- In this method the transducer is placed on the eyelid. Ultrasonographic imaging was performed using a Voluson 730 pro Machine with a 2D linear multi frequency transducer (6-12MHz) and a D linear multi frequency transducer (5-12MHz). Results- Vessels identified a majority of the cases (>50%) in 2D and 3D color and power ultrasonography included: external ophthalmic artery (EOA), internal ophthalmic artery (IOA), long posterior artery (LPA), short posterior artery (SPA), dorsal ophthalmic vein (DOV), ventral ophthalmic vein (VOV), and ciliary artery (CA). the vessels imaged less frequently included: retinal artery and internal ophthalmic vein.Conclusion and Clinical Relevance- Reproducibility of 3D power and color Doppler was similar with 2D ultrasonography. The present study showed that 3D ultrasonography did not have any superiority to 2D in the eye vascular detection which could be because of small size and low velocity of the vessels in the organ.