For most patients, the back or bra line roles can be handles using one of the many liposuction techniques. In my experience the fat on the back is more fibrous than many other areas of the body and, therefore, requires either laser assisted or power assisted liposuction to get the optimum result. Every patient is different, however, and your question can best be answered by your own plastic surgeon after a complete history and physical examination.
Sometimes liposuction in this area can smooth out the back. This is your best option as it avoids scars. However, when the skin is excessive, a back lift can be done where an elliptical area of skin along your bra line is removed, leaving a horizontal scar.