EBRT stands as the most prevalent form of radiation treatment, involving the precise delivery of high-energy beams externally to target tumor sites. At AOI, through state-of-the-art imaging technologies and meticulous computer planning, the oncologists can pinpoint cancerous cells while preserving the integrity of surrounding healthy tissues.

Utilizing sophisticated linear accelerators, EBRT administers high-energy X-rays or electrons directed at the tumor. These beams are meticulously shaped and targeted, aiming to disrupt the DNA of cancer cells, thus impeding their capacity to proliferate and spread. With time, the compromised cancer cells undergo cell death, leading to the gradual shrinkage of the tumor.

Types of External Beam Radiation Therapy (EBRT)

• 3D Conformal Radiation Therapy (3D-CRT): 3D Conformal Radiation Therapy (3D-CRT) uses three-dimensional scans from CT or MRI to create a detailed map of the tumor and surrounding structures. With this information, oncologists can shape the radiation beams to conform to the shape of the tumor, enhancing precision.
• Intensity-Modulated Radiation Therapy (IMRT): Intensity-Modulated Radiation Therapy (IMRT) is a more advanced form of radiation therapy. IMRT allows oncologists to modulate the intensity of the radiation beams, delivering higher doses to the tumor while minimizing exposure to adjacent healthy tissues.
• Image-Guided Radiation Therapy (IGRT): Image-Guided Radiation Therapy (IGRT) incorporates imaging technologies like CT, MRI, and PET scans before and during treatment to ensure accurate delivery of radiation. This technique accounts for tumor movement and changes in position between sessions, making it more precise than IMRT technique.
• Stereotactic Body Radiotherapy (SBRT): Stereotactic Body Radiation Therapy (SBRT) delivers very high doses of radiation to small, well-defined tumors in fewer treatment sessions. It's often used for cancers in areas like the lungs, liver, and spine.
• Stereotactic Radiosurgery (SRT/SRS): Despite its name, Stereotactic Radiosurgery (SRT) is a non-surgical procedure that uses focused beams of high-dose radiation to treat small tumors, particularly in the brain and spine. SRT is renowned for its precision, often requiring just one or a few sessions.
• RapidArc/Volumetric Modulated Arc Therapy (VMAT) - RapidArc or Volumetric Modulated Arc Therapy (VMAT) is a type of IMRT that delivers radiation in a single or multi-arc, sweeping motion around the patient. This method significantly reduces treatment time and enhances precision.
• Total Body Irradiation (TBI) : Total Body Irradiation (TBI) involves exposing the entire body to radiation and is typically used in preparation for bone marrow or stem cell transplants. The goal is to eradicate cancerous cells and suppress the immune system to prevent transplant rejection