A system for planning an ablation procedure, the system comprising:a plurality of ablation probes (112. 112')； anda generator assembly (200) configured to couple to at least one of the plurality of ablation probes (112. 112'), the generator including:a generator module (286) configured to generate ablative energy；a user interface (210) comprising a display (210), the user interface configured to receive a user-selectable input enabling a user to select an ablation shape and at least one probe parameter； anda processor (282) configured to cause the user interface to display a preview of at least one of the plurality of ablation probes, suitable for forming an ablation volume corresponding to the user-selected ablation shape based on the at least one probe parameter (307, 307') to enable the user to select one of the probes to be coupled to the generator..
