I have a problem

Everytime I burn a disc image, I get an error "the disc is in use"

What's my DVD-R in use by? iTunes! To solve this I have to close iTunes and then reboot my computer, after that I can finally burn my disc image.

This never used to happen on my old MacBook Pro, but since getting my 27" iMac, iTunes refuses to let go of it's hold on the DVD drive and will not let me burn any disc images unless it's closed and i restart my computer.

In looking for a long-term solution for this (I burn alot of disc images) what can I do to get iTunes to stop other programs from letting me burn disc images?