A method of presenting real estate data is provided. A first temperature sensing means is connected to a first carrier, which is made to be advanced through a first opening in catheter, and said first carrier is equipped with a pointed tip for insertion into such body tissue that is to be heat-treated. The reconstruction comprises a derivation of the measuring values of parallel rays of different projections, an integration of these values along K lines, a weighting of these values and a back projection. The polishing apparatus is able to perform the method. The capacitor is coupled between the amplifier output and the second gain stage input.