??? Images TV custom size output

i want to use just one image from a Image TV but
i want its size to change depending on where its shown.

i would like to avoid the need of crating many Image TV
with needed sizes of an image.

is it possible?

http://modxcms.com/forums/index.php/topic,41185.msg248343.html#msg248343

thanks.
havent checked that, quite cool.
bless i.