pgf graphics file search path

[newbeamer]

I'm new to beamer/pgf. I am using a beamer template and want to use a logo file.

\pgfdeclareimage[height=0.5cm]{university-logo}{OurLogoFileNameSansExt}

does not adhere to the graphicx \graphicspath{...} setting.
Obviously I could just copy over the logo file, but then I would start spreading redundant copies of the logo files all over the file system.
Isn't there an equivalent to \graphicspath for pgf? Browsing the manual did not enlight me.

TIA, Martin