Abstract

Stereotactic radiosurgery/radiotherapy (SRS/SRT) delivers radiation with great spatial precision. To achieve sub-mm precision for intracranial SRS, a head ring is rigidly fixated to the skull to create a fixed reference. For some patients, invasiveness of the ring can be highly uncomfortable and not well-tolerated. In addition, placing and removing the ring requires special expertise from the physician, and patient setup time for SRS can often be long. To reduce the invasiveness and setup time, we are developing a system for performing accurate head positioning without use of a head ring.

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