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Stereotactic radiosurgery (SRS) is a noninvasive radiation therapy that uses highly focused radiation beams to destroy tumors in the brain, neck, spine, lungs and other parts of the body. Stereotactic body radiotherapy (SBRT) is used to treat tumors in other parts of the body besides the brain and head.
SRS and SRBT are effective at treating very small, well-defined tumors that are difficult to reach and can’t be surgically removed. By delivering high-dose radiation to precise locations, they spare surrounding healthy tissue. For many people, SRS and SBRT are safer and more effective than open surgery.
Stereotactic radiosurgery doctors use three types of technology to deliver radiation during treatments.
SRS uses high doses of very targeted radiation to destroy tumors in just one treatment session. Several radiation beams reach the tumor at one time, at higher doses than with other radiation techniques. It’s used to treat inoperable tumors in the brain and head without a surgical incision. A radiation oncologist oversees treatment in coordination with a neurosurgeon.
SBRT, also known as stereotactic ablative body radiotherapy (SABR), delivers high-dose radiation to cancers of the lung, liver, prostate, spine and gastrointestinal system in two to five treatments. It’s ideal for tumors that are hard to reach, prone to movement or next to vital organs.
SRS and SBRT offer several advantages, including:
SRS and SBRT are outpatient procedures typically lasting 20 minutes to an hour. Treatment doesn’t need to occur on consecutive days and is usually completed within 10 days. Your SRS treatment plan is tailored to your cancer type and unique needs. Your Mercy care team explains your plan and provides a treatment schedule.
Planning sessions determine what type and dose of radiation you’ll receive. CT or MRI scans are used to create 3D maps of tumors and determine placement. This allows radiation to be delivered with extreme precision (within a millimeter of its target). Tiny “markers” or seeds may be placed in your body to help your care team quickly locate your tumor. They also ensure your body is positioned correctly during treatment. You may also need to use a custom-fit, molded device to help you remain still during treatment.
During SRS and SBRT treatment, you’ll be awake and able to talk to your care team. Treatment length depends on the size and number of tumors being targeted. Your care team monitors you throughout the entire procedure.
SRS and SBRT are noninvasive treatments that pose less risk than traditional open surgery. Side effects from these treatments are usually temporary and may include:
Possible long-term risks include:
Mercy offers cancer pain management services with many options for keeping you comfortable, so you can enjoy a better quality of life.
A cancer patient shares his experience with Gamma Knife®, a type of brain radiosurgery.
At Mercy, we offer comprehensive radiation services to diagnose and treat a full range of conditions, including: