.htaccess - disallowing images to be displayed

Hi

I have a folder "images" on my website.

I keep all the images for my website in the "images" folder.

So, what I want is, if someone tries to go to an image directly by typing

http://mywebsite.com/images/logo.gif

it should redirect the user to http://mywebsite.com

can this be done in .htaccess?

Thanks for any help.