Heavy ion radiography is a new experimental form of medical imaging. The Lawrence Berkeley Radiation Laboratory is the only facility in the world with enough flux of heavy ions to satisfactorily visualize objects. A. model is described showing the superiority of heavy ion radiography, in regard to density resolution, compared to diagnostic x-ray energies and computerized tomography. Examples are shown. Tissue specimens are used for heavy ion radiography and the superior density resolution is demonstrated. Heavy ions are also being used for radiation therapy and early work on reconstruction is currently being done.