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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                                ----------------
                                  Schedule TO/A
            Tender Offer Statement under Section 14(d)(1) or 13(e)(1)
                     of the Securities Exchange Act of 1934
                                (Amendment No. 1)

                                ----------------

                               Invivo Corporation
                            (Name of Subject Company)

                                ----------------

                         Invivo Acquisition Corporation
                       Intermagnetics General Corporation
                       (Name of Filing Persons (Offeror))

                                ----------------

                     Common Stock, Par Value $0.01 Per Share
                         (Title of Class of Securities)

                                ----------------

                                    461858102
                      (CUSIP Number of Class of Securities)

                                ----------------

                                Glenn H. Epstein
                      Chairman and Chief Executive Officer
                       INTERMAGNETICS GENERAL CORPORATION
                             450 Old Niskayuna Road
                                  P.O. Box 461
                             Latham, New York 12110
                                 (518) 782-1122
                     (Name, address and telephone number of
                          person authorized to receive
                          notices and communications on
                            behalf of filing person)

                                    Copy to:

                               Clare O'Brien, Esq.
                             Shearman & Sterling LLP
                              599 Lexington Avenue
                            New York, New York 10022
                                 (212) 848-4000



                                               CALCULATION OF FILING FEE
=========================================================== ========================================================
                  Transaction Valuation*                                    Amount of Filing Fee**
----------------------------------------------------------- --------------------------------------------------------
                                                                                  

----------------------------------------------------------- --------------------------------------------------------
                     $152,034,519.66                                              $12,299.59
=========================================================== ========================================================

*    Estimated for purposes of calculating the amount of the filing fee only.
     The fee was calculated by multiplying $22.00, the per share tender offer
     price, by the 5,970,156 currently outstanding shares of Common Stock sought
     in the Offer, which gives an aggregate consideration of $131,343,432.00
     (the "Common Stock Consideration"). The Common Stock Consideration was then
     added to $20,691,087.66, being the net consideration for the Subject
     Company's 1,448,662 stock options, to arrive at a total transaction value
     of $152,034,519.66.
**   Calculated as 0.008090% of the transaction value.
|X|  Check the box if any part of the fee is offset as provided by Rule
     0-11(a)(2) and identify the filing with which the offsetting fee was
     previously paid. Identify the previous filing by registration statement
     number, or the Form or Schedule and the date of its filing.
     Amount Previously Paid:    $12,299.59            Filing Party:  Intermagnetics General Corporation
     Form or Registration No.:  Schedule TO           Date Filed:    December 23, 2003
[ ]  Check the box if the filing relates solely to preliminary communications
     made before the commencement of a tender offer. Check the appropriate boxes
     to designate any transactions to which the statement relates:
|X|  third-party tender offer subject to Rule 14d-1.
[ ]  issuer tender offer subject to Rule 13e-4.
[ ]  going-private transaction subject to Rule 13e-3.
[ ]  amendment to Schedule 13D under Rule 13d-2.
     Check the following box if the filing is a final amendment reporting the
     results of the tender offer: [ ]


         This Amendment No. 1 (the "Amendment") amends and supplements the
Tender Offer Statement on Schedule TO (the "Schedule TO") filed on December 23,
2003 by Invivo Acquisition Corporation f/k/a Magic Subsidiary Corporation, a
Delaware corporation ("Purchaser") and a wholly owned subsidiary of
Intermagnetics General Corporation, a New York corporation ("Parent"). The
Schedule TO relates to the Offer by Purchaser to purchase all outstanding shares
of Common Stock, par value $0.01 per share (the "Shares"), of Invivo
Corporation, a Delaware corporation (the "Company"), at a purchase price of
$22.00 per Share, net to the seller in cash, upon the terms and subject to the
conditions set forth in the Offer to Purchase dated December 23, 2003 (the
"Offer to Purchase") and in the related Letter of Transmittal, copies of which
are attached to the Schedule TO as Exhibits (a)(1) and (a)(2) (which, together
with any amendments or supplements thereto, collectively constitute the
"Offer"). Capitalized terms used and not otherwise defined herein shall have the
meanings ascribed to such terms in the Offer to Purchase or the Schedule TO.

Item 11. Additional Information.

         Item 11 of the Schedule TO is hereby amended and supplemented by the
following:

         The waiting period under the Hart-Scott-Rodino Antitrust Improvements
Act of 1976, as amended, expired at 11:59 p.m. on January 6, 2004 without a
request for additional information or documentary material.

Item 12.          Material to Be Filed as Exhibits.

(a)(1)            Offer to Purchase dated December 23, 2003.*

(a)(2)            Form of Letter of Transmittal.*

(a)(3)            Form of Notice of Guaranteed Delivery.*

(a)(4)            Form of Letter from Purchaser to Brokers, Dealers, Commercial
                  Banks, Trust Companies and Other Nominees.*

(a)(5)            Form of Letter from Brokers, Dealers, Commercial Banks, Trust
                  Companies and Nominees to Clients.*

(a)(6)            Form of Guidelines for Certification of Taxpayer
                  Identification Number on Substitute Form W-9.*

(a)(7)            Summary Advertisement as published in The New York Times on
                  December 23, 2003.*

(a)(8)            Joint Press Release issued by Parent and the Company on
                  December 18, 2003 (incorporated by reference to Exhibit 99.1
                  to the Schedule TO-C of Parent and Purchaser filed on December
                  18, 2003).

(b)(1)            Credit Agreement among Parent, as Borrower, and the domestic
                  subsidiaries of Parent, as Guarantors, the lenders parties
                  thereto, JPMorgan Chase Bank, as Syndication Agent, KeyBank,
                  N.A., as Documentation Agent, and Wachovia Bank, N.A., as
                  Administrative Agent, dated as of December 17, 2003.*

(d)(1)            Agreement and Plan of Merger, dated as of December 17, 2003,
                  among Parent, Purchaser, and the Company (incorporated by
                  reference to Exhibit 99.2 to the Form 8-K of Parent filed on
                  December 18, 2003).

(d)(2)            Confidentiality Letter Agreement, dated November 21, 2003,
                  between Parent and the Company.*

(g)               None.

(h)               None.

99.1              Press Release issued by Parent on January 7, 2004.

-----------------------------------------

* Incorporated by reference to the Schedule TO filed by Purchaser and Parent on
December 23, 2003.


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         After due inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

Dated: January 7, 2004

                                             INVIVO ACQUISITION CORPORATION


                                             By: /s/ Glenn H. Epstein
                                                -------------------------------
                                                 Name:  Glenn H. Epstein
                                                 Title: President




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         After due inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

Dated: January 7, 2004

                                     INTERMAGNETICS GENERAL CORPORATION


                                     By:  /s/ Glenn H. Epstein
                                        -------------------------------------
                                          Name:  Glenn H. Epstein
                                          Title: Chairman and Chief Executive
                                                 Officer

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                                  EXHIBIT INDEX
Exhibit
No.
-------

(a)(1)            Offer to Purchase dated December 23, 2003.*

(a)(2)            Form of Letter of Transmittal.*

(a)(3)            Form of Notice of Guaranteed Delivery.*

(a)(4)            Form of Letter from Purchaser to Brokers, Dealers, Commercial
                  Banks, Trust Companies and Other Nominees.*

(a)(5)            Form of Letter from Brokers, Dealers, Commercial Banks, Trust
                  Companies and Nominees to Clients.*

(a)(6)            Form of Guidelines for Certification of Taxpayer
                  Identification Number on Substitute Form W-9.*

(a)(7)            Summary Advertisement as published in The New York Times on
                  December 23, 2003.*

(a)(8)            Joint Press Release issued by Parent and the Company on
                  December 18, 2003 (incorporated by reference to Exhibit 99.1
                  to the Schedule TO-C of Parent and Purchaser filed on December
                  18, 2003).

(b)(1)            Credit Agreement among Parent, as Borrower, and the domestic
                  subsidiaries of Parent, as Guarantors, the lenders parties
                  thereto, JPMorgan Chase Bank, as Syndication Agent, KeyBank,
                  N.A., as Documentation Agent, and Wachovia Bank, N.A., as
                  Administrative Agent, dated as of December 17, 2003.*

(d)(1)            Agreement and Plan of Merger, dated as of December 17, 2003,
                  among Parent, Purchaser, and the Company (incorporated by
                  reference to Exhibit 99.2 to the Form 8-K of Parent filed on
                  December 18, 2003).

(d)(2)            Confidentiality Letter Agreement, dated November 21, 2003,
                  between Parent and the Company.*

(g)               None.

(h)               None.

99.1              Press Release issued by Parent on January 7, 2004.


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* Incorporated by reference to the Schedule TO filed by Purchaser and Parent on
December 23, 2003.


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