a method of performing an ablation procedure includes the initial step of supplying a fluid to a cooling chamber defined within an antenna assembly . the method also includes the steps of decreasing the temperature of the fluid to form a solid material and inserting the antenna assembly into tissue . the method also includes the step of supplying energy to the antenna assembly to treat tissue . residual heat from the antenna assembly transitions the solid material back to the fluid . the method also includes the step of circulating the fluid within the antenna assembly to dissipate heat emanating from the antenna assembly .