A microwave ablation system configured for use in luminal network, comprising:a microwave energy source (16)；a tool (14) for treating tissue, the tool configured to receive microwave energy from the microwave energy source；an extended working channel (190) configured to provide passage for the tool；a locatable guide catheter (12) including a position sensor (96) positionable through the extended working channel and configured to navigate the extended working channel adjacent the target tissue (68) ； andat least one imaging modality for confirming placement of the tool within target tissue.
