AMENDMENT TO
                       AGREEMENT OF LIMITED PARTNERSHIP OF
             FAYETTEVILLE LITHOTRIPTERS LIMITED PARTNERSHIP - UTAH I


                  THIS AMENDMENT,  effective as of the 1st day of June, 1999, is
entered into by and among Lithotripters,  Inc., a North Carolina corporation and
the General Partner of Fayetteville  Lithotripters Limited Partnership-Utah I, a
Utah limited  partnership (the  "Partnership"),  and the Limited Partners of the
Partnership.

                                R E C I T A L S:
                                 ---------------

                  1. The General Partner and the Limited  Partners,  hereinafter
collectively  referred to as the "Partners," are parties to that certain Amended
and Restated  Agreement of Limited  Partnership  of  Fayetteville  Lithotripters
Limited  Partnership-Utah  I,  dated  as of  January  7,  1989 as  amended  (the
"Agreement").

                  2. The  Partners  desire to  further  amend the  Agreement  to
reflect the redemption by the  Partnership of an aggregate 1.5% limited  partner
interest from Stacy Childs, M.D.

                  NOW,  THEREFORE,  in  consideration  of the  mutual  promises,
covenants,  conditions and agreements herein contained, the parties hereto agree
as follows:

                           Schedule  A-6 is  deleted in its  entirety  and a new
                           Schedule A-7,  attached  hereto is substituted in its
                           place.

                  IN WITNESS WHEREOF, the Partners have hereunto set their hands
and seals effective as of the date first above written.

                                       GENERAL PARTNER:

                                       LITHOTRIPTERS, INC.


                                  By:/s/ Joseph Jenkins, M.D.
                                  --------------------------
                                            Joseph Jenkins, M.D.
                                            President



                                                        -1-


<PAGE>





                                        ALL THE LIMITED PARTNERS OF
                                        THE PARTNERSHIP WHOSE NAMES
                                        APPEARED ON SCHEDULE A-6

                                                     By:/s/ Joseph Jenkins, M.D.
                                                     ---------------------------
                                                      Joseph Jenkins, M.D.
                                                      Attorney-in-Fact*
--------
     *Pursuant  to a Power of  Attorney  given by the  Limited  Partners  in the
Agreement.



                                                        -2-


<PAGE>



                                  SCHEDULE A-7


                        Schedule of Partnership Interests

              FAYETTEVILLE LITHOTRIPTERS LIMITED PARTNERSHIP-UTAH I

      CONTRIBUTIONS OF CAPITAL TO THE PARTNERSHIP AND PERCENTAGE INTERESTS

                                       Cash                   Percentage
General Partner                     Contribution (1)           Interest
------- -------                     ------------               --------

Lithotripters, Inc.                $    19,562.50            19.644670%
2008 Litho Place, Suite 201
Fayetteville, NC  28304

Limited Partners

Joseph Armstrong, M.D.             $ 2,000.00                 1.964467%
1055 North 300 West #303
Provo, UT 84604

Michael J. Bateman                   2,000.00                 1.964467%
Medical Arts Building
1448 East Center, #7
Pocatello, ID 83201

Hal H. Bourne, M.D.                  4,000.00                 2.913706%
324 Tenth Avenue, #178
Salt Lake City, UT 84103

Thomas W. Brady, M.D.                  400.00                  .261929%

Dean L. Bristow, M.D.                2,000.00                 1.964467%
50 South Medical Drive
Payson, UT 84651

Curtis Campbell, M.D.                2,000.00                 1.964467%
3905 Harrison Boulevard
Ogden, UT 84403





                                                        -3-


<PAGE>



Peter M. Cannon, M.D.                3,000.00                    2.947208%
Teton Medical Specialty Center
2001 South Woodruff, Suite 4
Idaho Falls, ID 83404-6370

S. Corbin Clark, M.D.                2,000.00                    1.964467%
9690 South 1300 East, #100
Sandy, UT 84070

Paul K. Clark, M.D.                  2,000.00                    1.964467%
508 East South Temple
Suite 100
Salt Lake City, UT 84102

Robert C. Clift, M.D.                  400.00                     .392893%

Cottage Creek, L.L.C.                  N/A (3)                   1.015228%

Ronald H. Crouch, M.D.               4,000.00                    2.619289%
515 South 300 East
St. George, UT 84770

Duane E. Davis, M.D.                 2,000.00                     .982234%
930 North Fifth West
Provo, UT 84601

Danielle Davis Trust                   N/A (3)                    .982234%

Jonathan Garey-Sage, M.D.              400.00                     .392893%

David Henderson, M.D.                2,000.00                    1.964467%
415 Medical Drive, #202A
Bountiful, UT 84010

James C. Jensen, M.D.               52,500.00                     .761421%

Thomas H. Jordan                       750.00                     .491371%
82 Highwood Street
Louisville, KY 40206

David Kimball, M.D.                  4,000.00                    3.928934%
5770 South 250 East, #305
Salt Lake City, UT 84107





                                                        -4-


<PAGE>



Kenneth Kofoed, M.D.                 2,000.00                    1.964467%
2084 North 1700 West
Layton, UT 84041

Richard E. Lee, M.D.                 2,000.00                    1.964467%
324 Tenth Avenue, #178
Salt Lake City, UT 84103

Lithotripters, Inc.                  4,000.00(2)                15.28934%
2008 Litho Place
Fayetteville, NC 28304

Ned L. Mangelson, M.D.               2,000.00                    1.964467%
333 South Ninth East
Salt Lake City, UT 84102

Michael McFadden, M.D.              35,000.00                     .507614%

Richard B. Melzer, M.D.              1,000.00                     .654822%
2825-8th Avenue North
Billings, MT 59101

Anthony W. Middleton, Jr., M.D.      2,000.00                    1.964467%
1060 East First South, #112
Salt Lake City, UT 84102

George W. Middleton, M.D.            2,000.00                    1.964467%
1060 East First South, #112
Salt Lake City, UT 84102

James F. Morrell, M.D.               2,000.00                    1.964467%
1220 East 3900 South
Salt Lake City, UT 84124

Steven L. Moss, M.D.                   400.00                     .261929%

Ronald I. Oldroyd, M.D.              3,000.00                    1.964467%
930 North 500 West
Provo, UT 84601

Stephen Richardson, M.D.             2,000.00                    1.309645%
3980 South 700 East, #20
Murray, UT 84107
                                     - 5 -
<PAGE>


Odell F. Rigby, M.D.                 4,000.00                    3.928934%
333 South Ninth East
Salt Lake City, UT 84102



Ronald J. Saunders, M.D.             2,000.00                    1.964467%
120 North, 1220 East
American fork, UT 84003

John G. Scott, M.D.                    400.00                     .261929%

Herbert B. Spencer, M.D.             2,000.00                    1.964467%
920 North Fifth West
Provo, UT 84601

Charles T. Swallow, M.D.             2,000.00                    1.309645%
225 East Fourth North
Logan, UT 84321

Roger H. Tall, M.D.                  4,000.00                    3.928934%
Teton Medical Specialty Center
2001 South Woodruff, Suite 8
Idaho Falls, ID 83404-6370

Timothy Taylor, M.D.                35,000.00                     .507614%

Perry T. Walters, M.D.               2,000.00                    1.964467%
425 Medical Drive
Bountiful, UT 84010

Vanez B. Wilson, M.D.                2,000.00                    1.309645%
3980 South 700 East, #20
Murray, UT 84107
                                  --------------                 -------

             TOTAL                $320,812.50                     100%


(1)      The cash contributions  reflect the initial cash contributions of those
         Partners who currently hold an interest in the Partnership.

(2)  Lithotripters,  Inc.  acquired a portion of its  limited  partner  interest
pursuant to various  assignments from existing limited partners and made no cash
contributions to the Partnership for the limited partner interests received as a
result of such assignments.





                                                        -6-


<PAGE>


(3)      Acquired  its limited  partner  interest  pursuant to  assignment  from
         existing  limited  partner  and  made  no  cash  contributions  to  the
         Partnership  for the limited partner  interest  received as a result of
         such assignment.



                                                        -7-


<PAGE>