| For                the fiscal year ended October                31,                2007  | Commission                File Number___001-15016  |
|-----------------------------------------------------------------------------------------------|---------------------------------------------------------|

| MDS                INC.(Exact                name of Registrant as specified in its charter)                                                                                                                                                                                                                                     |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Canada                (Federal)(Province                or other jurisdiction of incorporation or organization)                                                                                                                                                                                                                  |
| 8099(Primary                Standard Industrial Classification Code Number (if applicable))                                                                                                                                                                                                                                      |
| 98-0170107(I.R.S.                Employer Identification Number (if applicable))                                                                                                                                                                                                                                                 |
| Suite                300, West Tower2700                Matheson Blvd., EastMississauga,                Ontario Canada L4W 4V9(416)                213-4082(Address                and telephone number of Registrant's principal executive offices)                                                                             |
| MDS                Pharma Services (US) Inc.621                Rose Street,  P.O. Box 80837, Lincoln, Nebraska 68501(402)                476-2811(Name,                address (including zip code) and telephone number (including area                code)of                agent for service in the United States) |

|  Title                of each class   | Name                of each exchange on which registered |
|--------------------------------------------|----------------------------------------------------------|
| Common                Shares, no par value | New                York Stock Exchange                   |
|                                            |                                                          |

| none(Title                of Class) |
|-------------------------------------|

| none(Title                of Class) |
|-------------------------------------|

| [                X                ] Annual information form | [                X                ] Audited annual financial statements |
|-------------------------------------------------------------|-------------------------------------------------------------------------|

(the "Registrant") is filing this Amendment      No. 1 to the      Registrant's Annual Report on Form 40-F in order to file a revised consent      of      Ernst & Young LLP, registered public accountants.

 Undertaking      and Consent to Service of Process

| Exhibit                No. | Description                                                                                                                                                                        |
|----------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 99.1                       | Revised                Consent of Ernst & Young LLP.                                                                                                                           |
| 31.2                       | Certification                of the Chief Executive Officer (Principal Executive Officer) pursuant                to                Section 302 of the Sarbanes-Oxley Act of 2002. |
| 31.3                       | Certification                of the Chief Financial Officer (Principal Financial Officer) pursuant                to                Section 302 of the Sarbanes-Oxley Act of 2002. |

| Date:                January 30, 2008 | MDS                Inc.By:                /s/ Douglas                S.                Prince                                                                      Name:                Douglas S. PrinceTitle:  Executive                Vice-President Financeand                Chief Financial Officer |
|---------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|                                  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |

| Exhibit                No. | Description                                                                                                                                                                        |
|----------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 99.1                       | Revised                Consent of Ernst & Young LLP.                                                                                                                           |
| 31.2                       | Certification                of the Chief Executive Officer (Principal Executive Officer) pursuant                to                Section 302 of the Sarbanes-Oxley Act of 2002. |
| 31.3                       | Certification                of the Chief Financial Officer (Principal Financial Officer) pursuant                to                Section 302 of the Sarbanes-Oxley Act of 2002. |