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Stereotactic Body Radiation Therapy (SBRT), also known as stereotactic ablative radiotherapy (SABR), is a highly precise form of radiation therapy used to treat cancer.
SBRT is a non-invasive, external beam radiation therapy. It falls under the category of precision radiotherapy due to its accuracy in targeting cancer cells while sparing healthy tissue.
1. Consultation and Evaluation:
The patient meets with a radiation oncologist to discuss SBRT as a treatment option.
A thorough medical evaluation, including imaging studies (CT, MRI, PET scans), is conducted to determine the size, shape, and location of the tumor.
2. Treatment Planning:
A customized treatment plan is created using advanced imaging and computer algorithms to define the exact coordinates of the tumor.
The patient undergoes a simulation session where they are positioned in the same manner as during actual treatment to ensure precision.
3. Immobilization:
The patient is placed in a special immobilization device to keep the body still during the procedure.
4. Imaging and Mapping:
High-resolution imaging is performed to map the tumor and surrounding critical structures.
Fiducial markers (tiny metal markers) may be implanted near the tumor to help with accurate targeting.
5. Radiation Delivery:
The patient undergoes several SBRT sessions (usually between 1 to 5), with each session lasting 30 to 90 minutes.
During each session, radiation beams are precisely directed to the tumor from multiple angles, ensuring maximum dose delivery to the cancer cells while sparing normal tissues.
6. Post-Treatment Monitoring:
After completing SBRT, the patient is monitored through follow-up visits and imaging studies to assess the effectiveness of the treatment and manage any side effects.
Regular check-ups help detect any recurrence or progression of the disease.