STAB, or "Stereotactic Ablative Body Radiotherapy," is a precise form of radiation therapy used to treat tumors. It delivers high doses of radiation to a targeted area while minimizing exposure to surrounding healthy tissue. This technique is often used for patients with inoperable tumors or those who prefer non-surgical options. The procedure typically involves imaging techniques, such as CT scans or MRI, to accurately locate the tumor. STAB can be used for various types of cancer, including lung cancer and liver cancer, and is known for its effectiveness in shrinking tumors and improving patient outcomes.