EXHIBIT 10.15




                    SECOND AMENDMENT TO EMPLOYMENT AGREEMENT



     This Second Amendment ("Amendment") to the Employment Agreement
("Agreement"), dated as of January 1, 1996, between Image Guided Technologies,
Inc., a Colorado corporation and f/k/a Pixsys, Inc. (the "Company"), and Paul L.
Ray ("Ray"), as amended by that certain Amendment to Employment Agreement dated
as of June 1, 1996, is entered into as of September 6, 1996.

     1.   Section 2 of the Agreement is hereby amended by changing the first
sentence thereof to read in full as follows:

          Subject to earlier termination as provided in Section 5, the
          employment hereunder shall be for a period of three years, commencing
          on January 1, 1996 (the "Commencement Date") and ending on December
          31, 1998.

     2.   All other terms and conditions of the Agreement shall remain in full
force and effect.

                                   IMAGE GUIDED TECHNOLOGIES, INC.



                                   By: /s/ Robert E. Silligman
                                       --------------------------------------
                                       Robert E. Silligman


                                       /s/ Paul L. Ray
                                       --------------------------------------
                                       Paul L. Ray