Cancer Treatment Centers of America

Respiratory gating

We use respiratory gating to accurately target tumors by adjusting for tumor motion during intensity modulated radiation therapy (IMRT).

Tumors often move as a result of breathing and other involuntary movement in the body. In the past, radiation oncologists have had to expand the treatment area to ensure the moving target is irradiated. In the process, healthy tissue near the tumor is also affected, leading to a high rate of side effects.

Respiratory gating enables us to “paint” optimal doses of radiation onto tumors with greater accuracy. The system senses and accounts for motion as the patient breathes in and out, helping us to target the tumor and protect healthy tissues from receiving unnecessary radiation.