Exhibit 10.9
January 7, 1994



Ronald G. Evens, M.D.
The Edward Mallinckrodt Institute
  of Radiology
516 S. Kingshighway
St. Louis, MO 63110

Dear Dr. Evens:

A letter agreement dated December 22, 1986 and renewal letters dated
November 29, 1989, February 19, 1991, January 16, 1992 and December
17, 1992 between you and Mallinckrodt Medical, Inc. set forth the
general terms and conditions under which you agree to serve
Mallinckrodt Medical, Inc. in a consulting capacity for the period
beginning January 1, 1987 and ending December 31, 1992.

Mallinckrodt Medical Inc. desires to retain your consulting services
through the period beginning January 1, 1994 and ending December 31,
1994 under the same terms and conditions as set forth in said letter
agreement dated December 22,1986 and renewal letters dated November
29, 1989 and February 19, 1991.

If the foregoing meets with your understanding and approval, please
execute this letter in duplicate at the place indicated below and
return one of the signed duplicates to us thereby indicating your
agreement to continue to serve Mallinckrodt Medical, Inc. as a
consultant for the above-stated period.

Very truly yours,                     ACCEPTED & AGREED TO:

MALLINCKRODT MEDICAL, INC.            RONALD G. EVENS, M.D.

BY:    J. EUGENE FOX                       RONALD G. EVENS, M.D.
- --------------------------            ------------------------------
       J. Eugene Fox                       Ronald G. Evens, M.D.

Title: Senior Vice President          Date:      1/24/94
       Science and Technology