Delet empty picture boxes in Quark 9 or 10

 Hi,

have a big problem, that seemed to be easy to solve. In my catalogue document i have lots of empty picture boxes anchored in text. Background is none, outline is none. I wanted to find all empty picture boxes and delete them. No way found neither in Q9 nor Q10. Would take hours to delete them manually. 

 What can I do?

 I'm on Mac Pro, 10.9.2, latest Q9 + Q10 Version

King regards