RF energy tuned and electrical characterization of tissue for the selective treatment of target tissues

A catheter system for remodeling a adjacent a blood vessel of a patient target material, the system comprising: a flexible catheter body elongate (14) having a proximal end (16) and a distal end (18) with an axis ( 20) therebetween; at least one surface of power management (722) disposed near the distal end of the catheter body, wherein the at least one surface of power management (722) is included on one or more flex circuits (712, 714, 716 ) mounted on a radially expandable structure (26); and a power supply (618; 608) electrically coupled to the (s) surface (s) of power management (722), the power source configured to energize (s) surface (s) of power management being a form of electrical energy; wherein the radially expandable structure (26) comprises a ball; wherein the at least one surface of power management comprises a plurality of electrodes (722) mounted on a plurality of flexible circuits (712, 714, 716), wherein each flexible circuit (712, 714, 716) comprises pairs bipolar electrode and / or sub-networks of electrodes (722) thereon; supporting the radially expandable structure (26) the plurality of electrodes (722) for radially connecting the plurality of electrodes against the vessel wall when expanded within the blood vessel.