Selectable eccentric remodeling and/or ablation of atherosclerotic material

A catheter system for eccentric remodeling of atherosclerotic material of a blood vessel of a patient, the system comprising:

• an elongate flexible catheter body having a proximal end and a distal end with an axis therebetween;
• a radially expandable structure near the distal end of the catheter body;
• a plurality of energy delivery surfaces, each energy delivery surface oriented radially when the expandable structure expands so as to provide an array of energy delivery surfaces distributed circumferentially about the axis of the blood vessel;
• an atherosclerotic material detector coupled to the catheter body for circumferential atherosclerotic material detection along the blood vessel;
• a power source electrically coupled to the energy delivery surfaces;
• and
• a controller coupling the power source to the array for selectively energizing an eccentric subset of the energy delivery surfaces in response to the detected atherosclerotic material, the power source energizing the energy delivery surfaces so as to eccentrically remodel the detected atherosclerotic material along the blood vessel.