[Inkscape-user] Imported png blurred

Hi, I'm working with Inkscape to make some illustrations and noticed some little problem. When I import a png file it losses detail and looks blurred, I attach and image so you see what I'm talking about. Inkscape is a great program and I like it more every time I use it. That's why I want to learn to produce great work with it. Please if anyone knows what can I do to avoid this inconvenience let me know. Tnx.

Facundo