SECURITIES PURCHASE AGREEMENT

                                    EX- 10.28

     This Securities Purchase Agreement  ("Agreement") is entered into as of the
18th day of June, 1996, by and between Primedex Health Systems, Inc., a New York
corporation ("Buyer"), and Norman R.
Hames ("Seller"), with reference to the following facts:

                                 R E C I T A L S

     A.  Pursuant to the terms of that certain  Securities  Purchase  Agreement,
dated as of March 22, 1996, between Buyer and Diagnostic Imaging Services, Inc.,
a Delaware  corporation  ("DIS"),  Buyer owns  certain  shares of the issued and
outstanding common stock, par value $.01 per share (the "DIS Common Stock"),  of
DIS and a warrant to purchase additional shares of DIS Common Stock.

     B.  Seller  owns a total of  2,448,862  shares  of DIS  Common  Stock  (the
"Shares")  and warrants to purchase an additional  507,737  shares of DIS Common
Stock (the  "Warrants").  The Warrants ire  evidenced by the Warrant  Agreements
identified in Exhibit A attached hereto (the "Warrant Agreements").  The Shares,
the Warrants and the shares of DIS Common Stock  issuable  upon  exercise of the
'Warrants   are   sometimes   hereinafter   collectively   referred  to  as  the
"Securities."

     C. Buyer desires to purchase 'and Seller desires to shall all of the Shares
and Warrants on the terms and conditions set forth herein.

     THEREFORE,  in  consideration  of the  foregoing  premises  and the  mutual
covenants set forth herein, Buyer and Seller hereby agree as follows:

     1.  Sale of Shares and Warrants.

         (a) Sale and Purchase.  On the terms and subject to the  conditions set
forth herein, Buyer hereby agrees to purchase, and Seller hereby agrees to sell,
all of the  Shares  and the  Warrants  free  and  clear of all  liens,  charges,
encumbrances and claims of any nature.

         (b)  Purchase  Price.  As full payment for the transfer and sale of the
Shares and the Warrants to Buyer pursuant hereto, at the Closing (as hereinafter
defined) Buyer shall issue to Seller (i) Buyer's Promissory Note in the original
principal  amount of  $2,304,292,  which  Promissory  Note  shall be in the form
attached   hereto  as  Exhibit   B-1  (the   "Promissory   Note"),   (ii)  Buyer
Non-Negotiable  Note in the original  principal  amount of $144,570,  which note
shall be in the form attached hereto as Exhibit B-2 (the "Non-Negotiable Note"),
and (iii) an option to purchase 3,000,000 shares of the common stock of Buyer at
an option price of $.60 per share,  which option shall De granted  pursuant to a
Warrant to Purchase  Agreement in the form attached hereto a Exhibit C (the "PHS
Option Agreement").

     2.  Representations  by Seller.  Seller hereby  represents  and warrants to
Buyer as follows:

         (a) Seller has good and marketable title to the Shares,  free and clear
of all liens,  claims,  encumbrances and  restrictions,  legal or equitable,  of
every  kind,  other  than:  (i)  restrictions  on  transferability   imposed  by
applicable state and federal securities laws; (H) the warrants to purchase up to
104,300 of the Shares  granted by Seller to Joseph  Berman,  the Berman IRA, Roy
Doumani,  Carol  Doumani,  the Doumani  ERA,  Genesis  Investors,  Arthur Hill &
Company,  LLP, Oppenheimer as Trustee for the Linden IRA pursuant to the Warrant
Agreements  dated as of  September  2, 1994 (the "Hames  Warrants"),  a true and
complete copy of which has been provided to Buyer;  (iii) obligations to deliver
2,000  shares  per month to Berman  and his IRA and  2,000  shares  per month to
Oppenheimer  for the Linden IRA for each  month  that the  outstanding  $125,000
obligations owed to each remains unpaid.  Seller has full and unrestricted legal
right,  power and authority to sell,  assign and transfer the Shares to Buyer in
accordance  with this Agreement  and,  except as described in clauses (i), (ii),
and (iii) above, the delivery of stock  certificates to Buyer in accordance with
Section 4 hereof will transfer valid title to the Shares,  free and clear of all
liens, encumbrances, claims and restrictions of every kind.









         (b) The  Warrants  were duly and validly  granted and issued to Seller,
and the Warrant Agreements constitute valid and binding agreements,  enforceable
against  DIS in  accordance  with their  respective  terms.  Seller has good and
marketable  title  to  the  Warrants,  free  and  clear  of all  liens,  claims,
encumbrances  and  restrictions,  legal or equitable,  of every kind, other than
restrictions on  transferability  set forth in the Warrant Agreements or imposed
by  applicable  state and federal  securities  laws.  Subject to  obtaining  the
consent of DIS to the transfer of the Warrants to Buyer,  the  assignment of the
Warrant  Agreement to Buyer as described in Section 4 will transfer  valid title
to the  Warrants  and the  Warrant  Agreements  to Buyer,  free and clear of all
liens,  encumbrances,   claims  and  restrictions  of  every  kind,  other  than
restrictions on  transferability  set forth in the Warrant Agreements or imposed
by applicable state and federal  securities  laws.  Seller has provided true and
complete copies of each of the Warrant Agreements to Buyer.

         (c) The execution,  delivery and  performance of this Agreement and the
consummation of the  transactions  contemplated  hereby will not (i) violate any
order,  judgment,  injunction,  award or  decree  of any  court,  arbitrator  or
governmental  or regulatory  body that is binding upon Seller,  (ii) violate any
statute, law or regulation applicable to Seller with respect to the transactions
contemplated herein or (iii) conflict with, result in their breach of the terms,
conditions  or  provisions  of or  constitute a default,  an event of default or
event creating rights of  acceleration,  termination or  cancellation  under any
note, instrument, agreement, mortgage, lease or other obligation to which Seller
is a party or to which any of the  Shares or the  Warrants,  or any of  Seller's
other properties, is subject.

         (d) Seller is not aware of any material adverse change in the business,
assets,  financial  condition or  prospects of DIS that is not  disclosed in the
Annual Report on Form 10-K for the fiscal year ended December 31, 1995, as filed
by DIS with the Securities and Exchange  Commission ("SEC"), or in the Quarterly
Report on Form 10-Q for the fiscal quarter ended September 30, 1995, as filed by
DIS with the SEC.  Seller will provide true and complete copies of said 10-K and
10-Q Reports to Buyer.

         (e) Except for the  contingent  right of Seller to acquire a portion of
the outstanding preferred shares held by DVI Health Services, Inc. under certain
circumstances, the Shares and the Warrants represent all equity interests in DIS
or any of its  affiliates  held by Seller,  including  without  limitations  all
rights to acquire any such equity interest.

         (f) As a result of any act or failure  to act by  Seller,  no person or
entity has, or as a result of the  transactions  contemplated  hereby will have,
any  right,  interest  or  valid  claim  against  or upon  Buyer  or DIS for any
commission, fee or compensation as a finder, broker or in any similar capacity.

     3.  Representations  by Buyer.  Buyer  represents and warrants to Seller as
follows:

         (a) Buyer is a corporation duly organized, validly existing and in good
standing  under the laws of the  State of New York and has the power and  lawful
authority  to enter  into this  Agreement  and to  consummate  the  transactions
provided for herein.

         (b) The  execution  and  delivery  of this  Agreement  and the  related
agreements (including without limitation the Promissory Note, the Non-Negotiable
Note, and the PHS Option Agreement)  referred to herein, and the consummation of
the transactions contemplated hereby and thereby, have been or will prior to the
Closing Date be duly and validly  authorized by the board of directors of Buyer,
and no other  acts or  proceedings  on the part of Buyer  will be  necessary  to
authorize  this  Agreement  or  the  related   agreements  or  the  transactions
contemplated hereby and thereby.

         (c) The execution,  delivery and  performance of this Agreement and the
consummation of the  transactions  contemplated  hereby will not (i) violate any
provision of the  Articles of  Incorporation  of Buyer,  (ii) violate any order,
judgment,  injunction,  award or decree of any court, arbitrator or governmental
or regulatory body that is binding under Buyer,  (iii) violate any statute,  law
or regulation applicable to Buyer with respect to the transactions  contemplated
herein or (iv)  conflict  with,  result in a breach of the terms,  conditions or
provisions  of or  constitute a default,  an event of default or event  creating
rights or acceleration, termination or cancellation under, any note, instrument,
agreement,  mortgage, lease or other obligations to which Buyer is a party or to
which any of its properties is subject.


                                        2







         (d) As a result of any act or  failure  to act by  Buyer,  no person or
entity has, or as a result of the  transactions  contemplated  hereby will have,
any right,  interest or valid claim  against or upon Seller for any  commission,
fee or other compensation as a finder, broker or in any similar capacity.

         (e) There have not been any material  adverse  changes in the business,
assets,  financial condition or prospects of Buyer that are not disclosed in the
Annual  Report on Form 10-K for the fiscal year ended October 31, 1995, as filed
by  Buyer  with  the  Securities  and  Exchange  Commission  ("SEC"),  or in the
Quarterly  Report on Form 10-Q for the fiscal quarter ended January 31, 1996, as
filed by Buyer with the SEC. Buyer has provided true and complete copies of said
10-K and 10-Q Reports to Seller.

     4.  Closing.  The  closing of the  transactions  provided  for herein  (the
"Closing")  shall take place at the offices of Buyer at 1516 Cotner Avenue,  Los
Angeles,  California  90025,  at 1:00 p.m. or June 25, 1996,  or such other date
agreed to by the parties (the "Closing Date"). At the Closing,  (a) Seller shall
deliver to Buyer (i) shares certificates  representing the Shares, duly endorsed
in blank or  accompanied by executed  stock  assignment  forms (in either event,
with  signatures  guaranteed),  and (ii) the  executed  originals of the Warrant
Agreements, together with an Assignment of the Warrant Agreements, substantially
in the form of Exhibit D attached  hereto,  duly executed by Seller and DIS, and
(b) Buyer shall deliver to Seller (i) a duly executed  Promissory  Note,  (ii) a
duly  executed  Non-Negotiable  Note,  and  (iii)  a duly  executed  PHS  Option
Agreement.

     5.  Additional Matters and Covenants.

         (a) Buyer  understands  and  acknowledges  that  Arthur  Hill & Co. LLP
currently  holds  16,500 of the Shares as security for its ability to exercise a
five (5) year  warrant  granted by Seller on 16,500 of the Shares.  Additionally
128,070 of the Shares  are held in pledge to secure  guarantees  given by Seller
for payment of DIS debt aggregating $250,000 plus interest. None of those Shares
can be delivered  unless and until the underlying  obligations  are satisfied or
the warrant not  exercised.  Additionally,  the 128,070 Shares may be reduced by
4,000  Shares  for  each  month  the  $250,000  obligation  is  not  discharged,
commencing July 1, 1996.

         (b) Each of the parties hereto  acknowledges that the execution of this
Agreement  and the  consummation  of the  transactions  provided for herein will
result in certain filing obligations under applicable SEC rules and regulations,
and Buyer and Seller each agrees to make all such  filings on a timely  basis in
accordance with such SEC rules and regulations.

         (c) Upon the  transfer of the Shares to Buyer  pursuant  hereto,  Buyer
agrees to be bound by the provisions of the Hames Warrants.

     6.  Securities  Representations.  In addition to the other  representations
made in Section 3 hereof,  Buyer  hereby  represents  and  warrants to Seller as
follows:

         (a) Buyer  acknowledges  that the  Securities  are and will be acquired
solely by and for the Buyer for investment and not as a nominee or agent for the
benefit of any other  person or entity,  and Buyer has no current  intention  of
distributing,  reselling  or  assigning  any of the  Securities,  other  than in
accordance  with the  provisions of the  Securities Act of 1933, as amended (the
"1933 Act"), and the rules and regulations adopted by the SEC under the 1933 Act
and any other applicable laws.

         (b) Buyer  understands that none of the Securities have been registered
under the 1933 Act and that DIS is under no  obligation  to  register  or assist
Buyer in registering any of the Securities. Buyer further understands and agrees
that the Securities must be held  indefinitely  unless  subsequently  registered
under the 1933 Act or an exemption from registration under the 1933 Act covering
any sale or any of the Securities is available.  Buyer  understands that legends
reflecting  these  restrictions  on  transferability  will be set  forth  on any
certificates evidencing the Shares or any shares of DIS Common Stock issued as a
result of the exercise of any Warrant.


                                        3







         (c) Buyer is aware that (i) its investment in the Securities involves a
possible  degree of risk,  lack of  liquidity  and  substantial  restriction  on
transferability  and (ii) no  federal or state  agency  has made any  finding or
determination  as to the fairness for  investment in, or any  recommendation  or
endorsement of, any of the Securities.

         (d) Buyer has sufficient  financial  resources available to support the
loss of all or a position of Buyer's  investment in the Securities,  has no need
for liquidity  with respect to its  investment in the  Securities and is able to
bear the economic risk of the investment.

         (e) Buyer is sophisticated  and experienced in financial,  business and
investment  matters,  is in the  same  business  as DIS  and is  aware  of  DIS'
financial  condition  and  business  affairs  and,  as a  result,  Buyer is in a
position to evaluate the merits and risks of an investment in the Securities.

         (f) Buyer has relied solely upon the advice of its management personnel
and advisors and independent  investigators  made by Buyer in deciding to invest
in the  Securities,  and no oral  or  other  representations  other  than  those
explicitly set forth in this Agreement have been made to Buyer  regarding DIS or
the Securities.

     7. Further  Assurances.  At the Closing,  and from time to time thereafter,
Seller shall execute and deliver to Buyer such other documents and  instruments,
and take such other actions,  as Buyer may  reasonably  request in order to more
fully vest in Buyer and to perfect its title to the Securities.

     8.  Miscellaneous.

         (a) Notices. All notices,  requests,  consents and other communications
required  or  permitted  under this  Agreement  shall be in  writing  (including
communications  transmitted by facsimile) and shall be (as elected by the person
giving such notice) hand delivered by messenger or courier service,  transmitted
by facsimile or mailed by registered or certified mail (postage prepaid), return
receipt requested, addressed as follows:

     If to Buyer: Primedex Health Systems, Inc.
                  1516 Cotner Avenue
                  Los, Angeles, CA 90025
                  Attention: Steven R. Hirschtick, Senior Vice President
                  Fax No. (310)478-5810

     If to Seller:Norman R. Hames
                  1516 Cotner Avenue
                  Los Angeles, CA 90025
                  Fax No. (310) 478-5810

or to such  other  address or  facsimile  number as any party may  designate  by
notice  complying with the terms of this Section 8(a). Each such notice shall be
deemed delivered (a) on the date delivered by personal delivery, (b) on the date
of transmission with confirmation of transmission if by facsimile and (c) on the
date upon  which the  return  receipt  as signed or  delivery  is refused or the
notice is designated by the postal  authorities as not deliverable,  as the case
may be, if mailed.

         (b) Specific Performance. The parties hereto acknowledge that they have
bargained for the  performance of the specific duties and obligations of each of
the parties  contained in this  Agreement and that, in the event of a default by
any party  hereunder,  money damages will not adequately  compensate the injured
party.  Accordingly,  each party  hereto  agrees and  consents  to the  specific
performance  of such  party's  duties  and  obligations  hereunder  by the valid
judgment  or decree of a court of  competent  jurisdiction  in the event of such
party's  failure to perform such duties and obligations in accordance with their
terms.


                                        4







         (c) Successors in Interest.  This  Agreement  shall be binding upon and
shall inure to the benefit of the successors, assigns, personal representatives,
heirs and legatees of the respective parties hereto.

         (d)  Choice  of  Law.  It is the  intention  of the  parties  that  the
substantive laws of California  shall govern the validity of the Agreement,  the
Construction of its terms and the interpretation of the rights and duties of the
parties hereunder.

         (e)  Severability.  In the event any provision hereof shall be invalid,
illegal or  unenforceable,  the  validity,  legality  or  enforceability  of the
remaining provisions shall not in any way be affected or impaired thereby.

         (f)  Integrated   Agreement.   The  foregoing  constitutes  the  entire
agreement of the parties on the subject  hereof,  and there are no agreements or
understandings  between the parties  relating to the sale of the  Securities  by
Seller to Buyer other than those set forth herein.

         (g) Counter Execution.  Separate copies of this Agreement may be signed
by the  parties  hereto,  with the same  effect as though all of the parties had
signed one copy of this Agreement.

     IN WITNESS WHEREOF,  the undersigned have executed this Securities Purchase
Agreement as of the date first above written.


                                       PRIMEDEX HEALTH SYSTEMS, INC.



                                       By:  /s/ Herm Rosenman
                            Herm Rosenman, President



                                        /s/ Norman R. Hames
                                       Norman R. Hames




                                        5






                                   SIGNATURES

     Pursuant  to the  requirements  of  Section  13 or 15(d) of the  Securities
Exchange Act of 1934, the Registrant has duly caused this report to be signed on
its behalf by the undersigned, thereunto duly authorized.

[Registrant]                              PRIMEDEX HEALTH SYSTEMS, INC.


Date:  August 13, 1997                    /s/ Howard G. Berger, M.D., President
                                          -------------------------------------
                       Howard G. Berger, M.D., President,
                                      Treasurer and Principal Financial Officer



      Pursuant to the requirements of the Securities  Exchange Act of 1934, this
report  has  been  signed  below  by the  following  persons  on  behalf  of the
Registrant and in the capacities and on the dates indicated:



By  /s/  Howard G. Berger, M.D.
      Howard G. Berger, M.D.

Date: August 13, 1997



By  /s/ Jaana Shellock
      Jaana Shellock

Date: August 13, 1997



By  /s/ Norman Hames
      Norman Hames

Date: August 13, 1997