Calypso Guided High Precision Stereotactic Ablative Radiosurgery for Lung TUmours Using Real-Time Tumour Tracking & Respiratory Gating

The anchored lung tracking beacons are passive electromagnetic transponder beacons which are placed immediately adjacent to a lung tumor using a bronchoscope. Three beacons will be placed in the small airways of the lung adjacent to the target tumor (within 3 cm of the tumor). Each beacon measures 2 mm in diameter and 8 mm in length and consists of a miniature electrical circuit that is encapsulated in a biocompatible glass capsule. Each beacon has an affixed five-legged anchoring system which expands to 5mm diameter once deployed. The Calypso transponder beacon is placed endobronchially using the working channel of a bronchoscope. Navigational bronchoscopy can be used to pre-plan the optimal location for each beacon to be placed within the airways by using a pre-bronchoscopy CT scan.