Sterotactic Radiosurgery in Mumbai
Stereotactic radiosurgery (SRS) uses diverse, precisely focused radiation beams to treat
tumors and diseases in the brain, neck, etc.
It is not a surgery in the traditional sense because there is no incision. Instead, SRS uses 3-D
imaging to target high doses of radiation towards the affected area with minimal impact on
the surrounding healthy tissue.
Like other forms of radiation, stereotactic radiosurgery works by destroying the DNA of the
targeted cells. The affected cells then lose the ability to reproduce, which causes tumors to
When doctors use stereotactic radiosurgery to treat tumors in areas of the body other than the
brain, it's sometimes called stereotactic body radiotherapy (SRBT) or stereotactic ablative
Types of stereotactic radiosurgery
Three types of technology are used to deliver radiation during stereotactic radiosurgery.
Linear accelerator (LINAC) machines use X-rays (photons) to treat cancerous and
noncancerous abnormalities in the brain and other parts of the body. LINAC machines
are also known by the brand name of the manufacturer, such as CyberKnife, Axesse,
Novalis Tx, TrueBeam and XKnife. These machines can perform SRS in a single
session or over three to five sessions for larger tumors, which is called fractionated
Gamma Knife machines use 192 or 201 small beams of gamma rays to target and
treat cancerous and noncancerous brain abnormalities. Gamma Knife machines are
less common than LINAC machines and are used primarily for small to medium
tumors and lesions in the brain associated with a variety of conditions.
Proton beam (charged particle radiosurgery) is the newest type of stereotactic
radiosurgery; it is available only at a few centers in the world. Apollo Hospitals is the
first to bring it to India. It can treat brain cancers in a single session using stereotactic
radiosurgery or use fractionated stereotactic radiotherapy to treat body tumors over