Horribe image quality in PDF

Hello,

my problem is very simple.

The quality of the image of my PDF is really horrible.

I need to have a PDF file because in order to print a magazine, that's the file that I need.

So I converted my picture:

http://image.noelshack.com/fichiers/2013/09/1362170332-2.png

Good quality for now.

Then, when I convert it PDF with Adobe Acrobat XI,

the result is very blurry, I tried to print it, very very bad quality ...

Is there any solution to keep the quality as good as it was?

(by the way, my image was a .png )

Thanks to the person who'll help me!