Varian won FDA clearance for its Calypso Anchored Beacon transponder for lung stereotactic body radiotherapy procedures. The device is positioned within a narrow airway close to or even on the tumor to be targeted. During radiotherapy procedures involving a Varian linear particle accelerator, the system tracks the motion of the transponder and adjusts the beam’s targeting 25 times per second.
The device holds onto the airway using five fork-like anchors and it emits electromagnetic signals that the tracking panel on the Calypso console uses to keep an eye on the implant in three dimensions.
Such technologies help to more precisely attack tumors while avoiding injury to fragile nearby tissues.