Patient & Visitor InformationContact Us
  • Location

    Rhode Island Hospital

    Grosvenor Building

    Providence, RI 02903

    401-444-4257

    Directions
    The Grosvenor Building is located directly beside the APC Building.

  • How Gamma Knife Works

    Gamma Knife Perfexion 2
    Photo courtesy Elekta 

    The gamma knife is a safe alternative to whole brain radiation treatment for multiple brain metastases.

    Since the gamma knife’s introduction in 1949, Leksell has continuously improved its technology and expanded gamma knife application. The technology builds on experience from treating more than 700,000 patients and knowledge shared through 3,000 peer-reviewed papers.

    Perfexion has a radiological accuracy of less than half a millimeter, as it uses nearly 200 radiation beams from cobalt-60 sources that converge with high accuracy on a single target. Each of Perfexion’s beams is low-intensity and, therefore, does not affect the tissue through which it passes on its way to the target. The beams converge in an isocenter where the cumulative radiation intensity becomes extremely high and effective. Multiple lesions may be seamlessly treated during one session.

    The system identifies the treatment area using the latest in digital imaging. Perfexion integrates imaging from CT scan, MRI and other modalities with the team’s treatment plan, allowing a flow of information that ensures the optimal dose of radiation.

    Gamma Knife Advances

    Perfexion, the latest generation of gamma knife technology, provides critical improvements to previous systems, including:

    • Treatment of previously inaccessible areas
    • Easier, quicker planning for treatment of a single lesion or multiple lesions
    • Significantly reduced treatment time compared to previous systems
    • An improved design that enables improved dose sculpting and dynamic shaping, resulting in further protection of nearby tissue