Absolutely. MRI is a useful tool for women who have breast implants since an exam using a contrast agent can help distinguish between the implant, scar tissue, normal and other breast tissues. The pictures from MRI are of the free-hanging breast and are three-dimensional (versus a mammogram, which compresses the breast and only gives a two-dimensional picture).
A breast tissue evaluation with implants is concerned with the breast tissue surrounding the implant, whether or not there is cancer. This type of exam requires a contrast agent. An implant evaluation, on the other hand, is just concerned with the implants, for example, if they are leaking or have ruptured. A contrast agent is usually not used in such exams and will therefore provide no information about the possibility of disease in the breast tissue itself.