When radiation therapy is given as a treatment for lung cancer, doctors need to make sure the radiation beams are directed to the tumor and not to nearby healthy tissue. Because the lungs move with breathing during radiation therapy, healthy tissue is at risk of receiving radiation. Patients may be asked to intermittently hold their breath during treatment, but even then, the tumor may be in a slightly different place each time, since each breath hold is different.
The goal of this study is to assess a new approach to determine where a lung tumor is during radiation treatment using special “Calypso beacon” implants. Calypso beacons are small devices implanted in a patient’s lung near the tumor. They send a signal to a tracking system to show where they are and where the tumor is as the patient holds his or her breath during radiation treatment. Doctors will implant two to three small beacons near a patient’s tumor during a bronchoscopy procedure.