particle flow particles to follow animated texture

[stevesideas]

I've looked around google but struggling to do what I want to do.

I have a dome shape with radio waves animated from the centre. I want to place particles on these waves via mapping and have the texture control the position of the particles as it animates. The texture is black and white with the radio waves as white.

Any ideas on how to do this ?

So far I've tried mapping dynamic and birth texture with no luck.