Exhibit 99.1

                                 CERTIFICATION

                                       OF

               CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER

I, DAVID WEINTRAUB, certify that:

1. I have  reviewed  this  quarterly  report  on Form  10-QSB  of  ADVANCED  3-D
ULTRASOUND SERVICES, INC., f/k/a YSEEK, INC.;

2. Based on my  knowledge,  this  quarterly  report  does not contain any untrue
statement of a material fact or omit to state a material fact  necessary to make
the statements made, in light of the  circumstances  under which such statements
were made, not  misleading  with respect to the period covered by this quarterly
report;

3.  Based  on my  knowledge,  the  financial  statements,  and  other  financial
information  included in this quarterly  report,  fairly present in all material
respects the financial  condition,  results of operations  and cash flows of the
registrant as of, and for, the periods presented in this quarterly report;

4.  The  registrant's  other  certifying  officers  and  I are  responsible  for
establishing and maintaining  disclosure  controls and procedures (as defined in
Exchange Act Rules 13a-14 and 15d-14) for the registrant and have:

     a) designed such disclosure controls and procedures to ensure that material
     information   relating  to  the  registrant,   including  its  consolidated
     subsidiaries,  is  made  known  to  us by  others  within  those  entities,
     particularly  during  the period in which  this  quarterly  report is being
     prepared;

     b) evaluated the effectiveness of the registrant's  disclosure controls and
     procedures  as of a date  within 90 days prior to the  filing  date of this
     quarterly report (the "Evaluation Date"); and

     c)  presented  in  this  quarterly   report  our   conclusions   about  the
     effectiveness  of the  disclosure  controls  and  procedures  based  on our
     evaluation as of the Evaluation Date;

5. The registrant's other certifying officers and I have disclosed, based on our
most recent evaluation,  to the registrant's auditors and the audit committee of
registrant's   board  of  directors  (or  persons   performing   the  equivalent
functions):

     a) all  significant  deficiencies  in the design or  operation  of internal
     controls which could adversely affect the  registrant's  ability to record,
     process,  summarize and report  financial data and have  identified for the
     registrant's auditors any material weaknesses in internal controls; and

     b) any fraud,  whether or not material,  that involves  management or other
     employees  who  have  a  significant  role  in  the  registrant's  internal
     controls; and

6. The  registrant's  other  certifying  officers  and I have  indicated in this
quarterly report whether there were significant  changes in internal controls or
in other factors that could significantly affect internal controls subsequent to
the date of our most recent  evaluation,  including any corrective  actions with
regard to significant deficiencies and material weaknesses.

Date: April 29, 2004

/s/ DAVID WEINTRAUB
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DAVID WEINTRAUB

Chief Executive Officer
Chief Financial Officer