A microwave ablation system, comprising:a microwave energy source；a microwave ablation catheter including a coaxial cable having a proximal end portion, a distal end portion, and inner and outer conductors having a dielectric disposed therebetween, the coaxial cable adapted to be connected at its proximal end portion to the microwave energy source, the coaxial cable including a distal radiating section disposed at its distal end portion, the inner conductor extending distally past the outer conductor in sealed engagement with the distal radiating section, the outer conductor having a braided configuration and configured to facilitate movement of the microwave ablation catheter through a branched luminal network of a patient； anda plurality of acoustic sensors positioned in airways proximate target tissue；the system being configured to measure a tissue property based on data received from the plurality of acoustic sensors.
