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The inaugural CyberKnife system was installed at Stanford University in 1991, receiving clearance for clinical investigation by the U.S. Food and Drug Administration (FDA) in 1994. Following extensive clinical research , the FDA granted approval for the treatment of intracranial tumors in 1999 and for tumors throughout the body in 2001.
The treatment field's length (the width of the radiation slice) is adjustable using collimator jaws. In static-jaw delivery, the field length remains constant during a treatment. In dynamic-jaw delivery, the field length changes so that it begins and ends at its minimum setting. Patient undergoing tomotherapy, face and body covered, to prevent ...
Radiosurgery is surgery using radiation, [1] that is, the destruction of precisely selected areas of tissue using ionizing radiation rather than excision with a blade. Like other forms of radiation therapy (also called radiotherapy), it is usually used to treat cancer.
The CyberKnife radiation system introduced in 1994 recommends a protocol of three sessions known as hypofractionation. Radiation dosages overall were reduced over the years as experience showed that excellent tumor control rates could be maintained even as dosages were lowered to benefit hearing preservation and facial nerve function.
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Positron emission tomography (PET) [1] is a functional imaging technique that uses radioactive substances known as radiotracers to visualize and measure changes in metabolic processes, and in other physiological activities including blood flow, regional chemical composition, and absorption.
SGRT systems can be set to automatically stop the delivery of radiation if a patient moves outside of a certain tolerance level. [ 5 ] SGRT can help to reduce errors in set-up and positioning, allow the margins around target tissue when planning to be reduced, and enable treatment to be adapted during its course, with the aim of overall ...