Intrabeam Therapy involves the use of a small, spherical applicator containing a radioactive source that is inserted into the cavity or space where the tumor used to be. If you have a pacemaker or other implanted device, it's important to inform your doctor before undergoing Intrabeam Therapy. Your doctor will evaluate your condition and determine whether it is safe for you to undergo the procedure with your device in place. In some cases, it may be necessary to remove the device temporarily during the procedure.