Radiotherapy
The cancer patient’s journey
What is External Beam Radiotherapy (EBRT)?
External Beam Radiotherapy (EBRT) is a common and effective type of cancer treatment that uses high-energy beams of radiation to target and destroy cancer cells. Unlike other forms of radiation therapy, EBRT delivers radiation from outside the body using a specialized machine.
How Does EBRT Work?
During EBRT, a machine called a linear accelerator directs precise beams of radiation at the tumour. The radiation damages the DNA of cancer cells, preventing them from growing and dividing, which ultimately kills them. Because the radiation is carefully targeted, it minimizes damage to the surrounding healthy tissue.
Types of EBRT:
3D Conformal Radiotherapy (3D-CRT):
Uses imaging technology to create a three-dimensional picture of the tumour. Radiation beams are shaped to match the tumour, allowing for precise targeting and sparing healthy tissue.
Intensity-Modulated Radiotherapy (IMRT):
Advanced form of 3D-CRT that modulates the intensity of the radiation beams. Allows higher doses to be focused on the tumour while reducing exposure to surrounding healthy tissue.
Image-Guided Radiotherapy (IGRT):
Combines imaging techniques with EBRT to ensure accurate delivery of radiation.
Imaging scans are taken before and during treatment to adjust for any movements, such as breathing, that may affect the tumour’s position.
Volumetric Modulated Arc Therapy (VMAT):
A type of IMRT that delivers radiation in a single or multiple arcs around the patient.
Provides precise targeting and shorter treatment times compared to traditional IMRT.
Stereotactic Radiotherapy and Stereotactic Body Radiotherapy (SRT/SBRT):
Delivers very high doses of radiation over fewer treatment sessions.
Used for small, well-defined tumours and involves precise targeting to minimize damage to healthy tissue.
Benefits of EBRT:
Non-Invasive: EBRT is a non-invasive treatment that does not require surgery.
Outpatient Procedure: Most treatments are done on an outpatient basis, so you can go home the same day.
Effective: Proven to be effective for many types of cancer.
The EBRT Process:
Planning: Before treatment begins, imaging tests (like CT or MRI scans) are used to map the exact location, shape, and size of the tumour.
Simulation: A simulation session helps position you correctly for treatment. You may be marked with small tattoos or skin markers to ensure consistent positioning.
Treatment Sessions: During each session, you lie on a treatment table while the linear accelerator moves around you, delivering radiation from different angles. Each session typically lasts 15-30 minutes.
Monitoring: Your Healthcare Team will monitor your progress and make any necessary adjustments to the treatment plan.
Side Effects:
As with any treatment, EBRT can have side effects. These may vary depending on the treatment area and dose. Common side effects include fatigue, skin irritation, and changes in the treated area. Your healthcare team will discuss potential side effects with you and provide strategies to manage them.
Is EBRT Right for You?
EBRT is suitable for many types of cancer. Your doctor will consider the type, location, and stage of your cancer, as well as your overall health, to determine if EBRT is an appropriate treatment option for you.
At Mountain View Oncology, we are dedicated to providing personalized care and the latest treatment options. If you have questions about External Beam Radiotherapy and how it might help you, our team is here to provide answers and support.