EXHIBIT (20) b

For Immediate Release                      Contact:    Anne Marie Bugge
                                                       (206)487-7081
                              
          SHAREHOLDERS APPROVE ATL/INTERSPEC MERGER

SEATTLE, Washington, May 16, 1994--ATL (Advanced Technology
Laboratories, Inc.), a worldwide leader in diagnostic
medical ultrasound, announced today that shareholders of
both ATL and Interspec, Inc. have approved the merger of the
two companies.  Interspec, a leader in the U.S. cardiology
ultrasound market, will become a wholly owned subsidiary of
ATL through an exchange of one share of Interspec stock for
0.413 shares of ATL stock.  On a 1993 basis, the acquisition
creates an ultrasound company with combined revenues of
approximately $360 million, an installed base of over 20,000
systems and a product line spanning all major clinical
applications.

"This acquisition broadens and complements our strong
position in the premium performance general imaging markets
led by the success of our digital High Definition (tm) Imaging
system," said Dennis C. Fill, ATL Chairman and CEO.  "Nearly
half of ATL's revenues were generated by the international
markets in 1993.  With the addition of Interspec, we obtain
an excellent base from which to address the growing
international demand for mid-priced, high quality ultrasound
systems as well as immediately expand our position in the
U.S. cardiology market. We believe that Interspec's high quality
Apogee (r) systems, designed specifically to meet the needs
of the radiology and cardiology mid-range markets, will be a 
strategic asset in ATL's growth."

The merger agreement provides that Edward Ray, currently
Interspec Chairman and CEO, will continue as president of
Interspec and join the ATL Board of Directors.  The
transaction is anticipated to close on May 17, 1994.
Interspec stock (Nasdaq:ISPC) will cease trading as of the
close of business  on that day.  Concurrently, Ralph M.
Barford is stepping down from the ATL Board as part of a
decision to reduce his corporate activities.

ATL, with headquarters in Bothell, Washington, is a
worldwide leader in the development, manufacture,
distribution and service of diagnostic medical ultrasound
systems.  ATL stock is traded on the Nasdaq National Market
under the symbol ATLI.  Interspec is located in Ambler,
Pennsylvania.
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                         051694/109