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Dr. Resham Srivastava is a Associate Director Radiation Oncology at the Medanta Hospital, Lucknow. She did her post graduation from the prestigious SGPGIMS, Lucknow and has more than 15 years of experience in the field of Radiation Oncology.

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  • Medanta Hospital, Amar Shaheed Path, Golf City, Pocket - 1, Sector A, Lucknow, Muzaffar Nagar Ghusval, Uttar Pradesh 226030
  • 0522 450 5076

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SRS / SRT

+91 91404 64395

Stereotactic Radiosurgery (SRS)/Stereotactic Radiotherapy (SRT)

Stereotactic Radiosurgery was initially defined as a single-fraction technique using stereotactic principles for targeting and treating intracranial lesions through the use of non-coplanar beams. The techniques on which radiosurgery is founded have been applied to fractionated treatments termed stereotactic radiotherapy (SRT). SRT is an advanced and modernized form of radiation therapy that uses high-energy X-ray beams to shrink or control the growth of a tumor or abnormal cells by either killing the cells directly or by disrupting their ability to grow.

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The type of radiation is the same for both conventional radiation therapy and SRT. However, SRT enables radiation oncologists to deliver high-dose radiation to a small, focused area. Using SRT, radiation oncologists are better able to exclude the surrounding normal tissues or organs than with conventional radiotherapy. This specialized form of radiation treatment involves a team of specialists, including neurosurgeons, radiation oncologists, radiologists, radiation physicists, radiation therapists, and nurses.

Although very similar therapies, SRS delivers a large dose of radiation on a single day, while SRT has a fractionated treatment schedule. With SRT, treatment will span multiple days. While the total dose with SRT may be larger than in SRS, in any single day, patients undergoing SRT receive a smaller radiation dose. Cranial SRS or SRT is now the standard of care for benign and malignant brain tumors and numerous benign conditions, including arteriovenous fistulas, trigeminal neuralgia, and other pain conditions, as well as movement disorders such as Parkinson’s disease and epilepsy.

More recently, SRS and SRT are also being used extra-cranially, namely for locations outside the brain.

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