Well, it depends.
First of all, it's probably much too late for this year. Applications opened on 9/15, and most programs have reviewed and made their selections. Applications received now will not likely be looked on favorably. So realistically, you'd be applying for a position next year.
Much depends upon why you were unsuccessful last time. Your Comp Eng degree is unlikely to help your application much, unless you have done radiology research / work in your degree program. If your application last time was limited by something (low USMLE, no US experience, no ECFMG, etc) and that's fixed now, you perhaps have a chance. But being 7 years out will be a huge negative. The only good news in all of this is that Rads is less competitive now than it was 7 years ago.