
<PAGE>
 
                            
                         [KATTEN MUCHIN & ZAVIS]     
                                             
                                          August 6, 1996     
   
Hologic, Inc.     
   
590 Lincoln Street     
   
Waltham, Massachusetts 02154     
   
Ladies and Gentlemen:     
   
  We hereby consent to the reference to our name in the Registration Statement
under the caption "Legal Matters".     
                                             
                                          Very truly yours,     
                                             
                                          /s/ Katten Muchin & Zavis     
                                          ---------------------------------
                                             
                                          Katten Muchin & Zavis     
