A method for producing microwave images that are improved through the reduction of multipath propagation effects is described. This method employs water immersed antennas and microwave time delay spectroscopy (TDS) at S-band. It is shown that objects as small as 6 mm in diameter can be detected. Objects 10 mm apart appear as separate responses on the image. It is also shown that is possible to generate a physiologically and anatomically relevant image of an isolated canine renal specimen.