Method and system for radiofrequency (RF) tissue(s) monitoring

There is provided a system, comprising: internal probe(s) for transmitting and/or receiving an RF signal, the internal probe(s) set to be mounted on an elongated guiding element set for insertion via the pharynx into a tract of a patient, the internal probe(s) and elongated guiding element are configured to be directly inserted into the tract independently of another guiding device; external probe(s) which is set to be positioned in a location outside the body for transmitting and/or receiving an RF signal; a processing unit configured to analyze an RF signal transmitted between transducer(s) of the internal probe(s) and transducer(s) of the external probe(s), propagating via tissue(s) of the patient between walls of the tract and a skin layer of the patient, to estimate at least one dielectric property of the tissue(s); wherein the RF signals are unsuitable for generating anatomical images of the tissue(s).