This study focuses on patients with Hepatocellular Carcinoma (HCC) who have undergone a surgery called hepatectomy with narrow margins (less than 1cm). A hepatectomy is when part of the liver is removed. The study tests a special type of radiation treatment called Simultaneously Integrated Boost (SIB) Radiotherapy to see if it helps patients live longer without the cancer returning. The plan is to use advanced techniques like IMRT (Intensity-Modulated Radiation Therapy) or VMAT (Volumetric Modulated Arc Therapy) to target the tumor area while protecting healthy organs.

• Participants need to visit the hospital for 23-25 sessions of radiation treatment.
• The main goal is to see the survival rate after 3 years.
• Participants should be ready to sign a consent form agreeing to take part.

To join, you must be over 18, have no other serious health conditions, and be recovering well from surgery. This study may not be suitable if you have previous liver issues or other cancers. If you agree to join, you will help researchers understand if this treatment is safe and effective for people like you.