Development of a second generation stereotactic apparatus for linear accelerator radiosurgery

Area of Science:

• Neurosurgery
• Medical Physics
• Radiotherapy

Background:

• Linear accelerator radiosurgery relies on precise, intersecting radiation beams.
• Maintaining the coincidence of gantry and couch rotation axes at the isocenter is crucial for accurate irradiation.
• A 1989 linear accelerator upgrade necessitated adaptation of the existing stereotactic apparatus.

Purpose of the Study:

• To describe the adaptation and mechanical testing of a stereotactic apparatus for a newly installed linear accelerator.
• To ensure the continued precision of radiosurgery following equipment modification.

Main Methods:

• Mechanical tests were performed on the new linear accelerator.
• The stereotactic head frame was adapted and fixed to a roller bearing.
• The modified apparatus was integrated to allow couch rotation for precise targeting.

Main Results:

• The new stereotactic apparatus was successfully adapted to the upgraded linear accelerator.
• Mechanical tests confirmed the integrity and functionality of the adapted system.
• The setup allows for accurate rotational alignment critical for radiosurgery.

Conclusions:

• The adapted stereotactic apparatus is suitable for use with the new linear accelerator.
• The described modifications maintain the precision required for effective linear accelerator radiosurgery.
• This technical adaptation ensures the continuity of advanced radiosurgical procedures.