UNITED STATES
SECURITIES AND EXCHANGE COMMISSION				
"Washington, D.C.  20549"							
				
SCHEDULE 13G/A							

Under the Securities Exchange Act of 1934
	Amendment 1	Filing	
					
(Name of Issuer)
	eResearch Technology, Inc.				
(Title of Class of Securities)	
	Common Stock	
				
(Cusip Number)
	29481V108								
										
(Date of Event Which Requires Filing of this Statement)			
		Dec-04	
							
Check the appropriate box to designate the rule pursuant to which this	
								
	Schedule is Filed:							
		[ x  ] Rule 13d-1(b)						
		[    ] Rule 13d-1(c)
[    ] Rule 13d-1(d)	
						
"*The remainder of this cover page shall be filled out for a reporting 
person's initial filing on this form with respect to the subject class of 
securities, and for any subsequent amendment containing information which 
would alter the disclosures provided in a prior cover page. The information 
required in the remainder of this cover page shall not be deemed to be 
"filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 
("Act") or otherwise subject to the liabilities of that section of the Act but 
shall be subject to all other provision of the Act (however, see the Notes).	
										
Cusip Number	
29481V108
							
1. Name of Reporting Persons. I.R.S. identification Nos. of above persons 
(entities only)									
	Next Century Growth Investors, LLC - 41-1923871			
										
2. Check the Appropriate Box if a Member of a Group (See Instructions)	 
(a)								
(b)	 
									
3. SEC Use Only	
							
4. Citizenship or Place of Organization	
	Delaware

Number of shares beneficially owned by each reporting person with:

5. Sole Voting Power				
	0			
6. Shared Voting Power				
	0
7. Sole Dispositive Power				
	0		
8. Shared Dispositive Power			
	0		
9. Aggregate Amount Beneficially Owned by Each Reporting Person
	%		
10. Check if the Aggregate Amount in Row (11) Excludes Certain	
	Shares (See Instructions)			
	N/A			
11. Percent of Class Represented by Amount in Row (11)	
      0%	
	
12. Type of Reporting Person (See Instructions)		
Cusip Number			
	29481V108								
			
1. Name of Reporting Persons.				
I.R.S. identification Nos. of above persons (entities only)
	Thomas L. Press

2. Check the Appropriate Box if a Member of a Group (See Instructions)	 
(a)	
(b)										
										
3. SEC Use Only	
	
4. Citizenship or Place of Organization				
	U.S.A.									
				
Number of shares beneficially owned by each reporting person with:

5. Sole Voting Power	
	0

6. Shared Voting Power	
	0 

7. Sole Dispositive Power	
	0	

8. Shared Dispositive Power		
	0

9. Aggregate Amount Beneficially Owned by Each Reporting Person
	0%		

10. Check if the Aggregate Amount in Row (11) Excludes Certain 
	Shares (See Instructions)
	N/A	

11. Percent of Class Represented by Amount in Row (11)	
	0%	

12. Type of Reporting Person (See Instructions)
	IN
Item 1(a).  The name of the issuer is:	
	eResearch Technology, Inc.

Item 1(b).  The principal executive office of the issuer is: 
	30 South 17th Street Philadelphia PA 19103

Item 2(a).  The names of the persons filing this statement are:
	
	Next Century Growth Investors, LLC, Thomas L. Press and Donald 
M. Longlet The persons filing this Schedule 13G have entered into a Joint 
Filing Agreement, a copy of which is filed with this statement as Exhibit 1, 
pursuant to which such persons have agreed to file this Schedule 13G jointly 
in accordance with the provisions of Rule 13d-1(k) of the Securities 
Exchange Act of 1934.  The persons filing this Schedule 13G are of the 
view that they are not acting as a "group" for purposes of Section 13(d) 
under the Securities Exchange Act of 1934.  Item 2(b).  The Principal 
business office of Next Century Growth Investors, LLC Thomas L. Press 
and Donald M. Longlet is:  5500 Wayzata Blvd., Suite 1275 Minneapolis, 
MN 55416									
	
Item 2(c). Next Century Growth Investors, LLC is a Delaware limited 
liability company and Thomas L. Press and Donald M. Longlet are citizens 
of the U.S.A. 
	
Item 2(d). This Statement relates to shares of the common stock of the
      Issuer (the ""Stock"")		
			
Item 2(e).  The CUSIP number of the Stock is:		
	29481V108
			
"Item 3.  If this statement is filed pursuant to ss.ss.240.13d-1(b) or 240.13d-
2(b) or (c), check whether the person filing is a:		
			
(a). [   ] Broker or dealer registered under section 15 of the Act (15 U.S.C. 
78o).			
			
(b). [   ] Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).	
		
			
(c ). [   ] Insurance company as defined in section 3(a)(19) of the Act (15 
U.S.C. 78c)			
	
(d). [   ] Investment company registered under section 8 of the Investment 
Company Act	of 1940 (15 U.S.C. 80a-8).
	
(e). [ x ] An investment adviser in accordance with ss.240.13d-
1(b)(1)(ii)(E).	
	
	"This Schedule 13G is being filed by Next Century Growth 
Investors, LLC as a registered investment adviser.  The Stock to which this 
Schedule 13G relates is held in investment advisory accounts of Next 
Century Growth Investors, LLC.
	
(f). [   ] An employee benefit plan or endowment fund in accordance with 	
	ss.240.13d-1(b)(1)(ii)(G).
	
(g). [ x ] A parent holding company or control person in accordance with 	
	ss.240.13d-1(b)(1)(ii)(G).
	
	"This Schedule 13G is also being filed by Thomas L. Press, who 
serves as Director, Chairman and Chief Executive Officer of Next Century 
Growth Investors, LLC and Donald M. Longlet, who serves as Director and 
President of Next Century Growth Investors, LLC.  Mr. Press owns in 
excess of 25% of Next Century Growth Investors, LLC and is a controlling 
person of Next Century Growth Investors, LLC.
	
(h). [   ] A savings associations as defined in section 3(b) of the Federal 
Deposit Insurance Act (12 U.S.C. 1813).
	
(I). [   ] A church plan that is excluded from the definition of an investment 
company under section 3(c )(14) of the Investment Company Act of 1940 
(15 U.S.C. 80a-3).
	
"(j). [   ] Group, in accordance with ss.240.13d-1(b)(1)(ii)(J)."	
	
Item 4. Ownership*	
	
The Stock to which this Schedule 13G relates may be deemed beneficially 
owned within the meaning of Rule 13d-3 of the Securities Exchange Act of 
1934 by (1) Next Century Growth Investors, LLC by virture of its 
investment discretion and/or voting power over client securities, which may 
be revoked; and (2) Thomas L. Press and Donald M. Longlet, as a result of 
their positions with and ownership positions in Next Century Growth 
Investors, LLC, which could be deemed to confer upon each of them voting 
and/or investment power over the shares.  Each of Next Century Growth 
Investors, LLC, Thomas L. Press and Donald M. Longlet disclaim beneficial 
ownership of the Stock except to the extent of each of their respective 
pecuniary interested therein, if any, and the filing of this Schedule 13G shall 
not be construed as an admission by any of such persons that it is the 
beneficial owner of the Stock.
	
See Items 5-9 and 11 on the cover page for each filer.	
	
Item 5.  Ownership of five percent or less of a Class	
If this statement is being filed to report the fact that as of the date hereof 
the 
reporting person has ceased to be the beneficial owner of more than five 
percent of the class of securities, check the following [X ].
	
Item 6.  The Stock to which this Schedule 13G relates is held in investment 
advisory accounts of Next Century Growth, LLC.  As a result, various 
persons have the right to receive or the power to direct the receipt of 
dividends from, or the proceeds from the sale of, the securities.  No such 
account is known to have such an interest relating to more than 5% of the 
class.

Item 7. Identification and Classification of the Subsidiary which acquired 
the security being reported on by the parent holding company:
	Not Applicable

Item 8. Identification and Classification of Members of the Group:	
	Not Applicable

Item 9. Notice of Dissolution of Group:					
	Not Applicable				

Item 10. Certification					
	"By signing below I certify that, to the best of my knowledge and 
belief, the securities referred to above were acquired and are held in the 
ordinary course of business and were not acquired and are not held for the 
purpose of or with the effect of changing or influencing the control of the 
issuer of the securities and were not acquired and are not held in connection 
with or as a participant in any transaction having that purpose or effect.	
	
SIGNATURE					
					
After reasonable inquiry and to the best of our knowledge and belief, the 
undersigned certify that the information set forth in this statement is true, 
complete and correct.					
					
	               Dated:  February 14, 2005			
					
	Next Century Growth Investors, LLC				
					
	               By:	/s/ Thomas L. Press			
			Thomas L. Press			
			Chief Executive Officer			

	               By:	/s/ Donald M. Longlet			
			Donald M. Longlet			
			President	 		

	Exhibit A
				
JOINT FILING AGREEMENT
					
In accordance with Rule 13d-1(k) under the Securities Exchange Act of 
1934, the undersigned persons agree and consent to the joint filing on their 
behalf of a statement on Schedule 13G, including amendments thereto, in 
connection with respect to shares of common stock of			
		
eResearch Technology, Inc.
					
IN WITNESS WHEREOF, the parties have executed this Joint Filing 
Agreement on February 14, 2005.
 NEXT CENTURY GROWTH INVESTORS, LLC	
	               By:	/s/ Thomas L. Press			
		Thomas L. Press, Chief Executive Officer			
	           THOMAS L. PRESS				
					
	               By:	/s/ Thomas L. Press			
		Thomas L. Press			
					
	               DONALD M. LONGLET				
					
	               By:	/s/ Donald M. Longlet			
		Donald M. Longlet