Indenture

Indenture. The Indenture dated as of February 10, 2005, by and between the Note Issuers, the Guarantors and U.S. Bank Trust National Association, as Trustee, pursuant to which the Notes are being issued, as amended or supplemented from time to time in accordance with the terms thereof.

Indenture. Shall mean the Indenture relating to the Securities, dated as of the Closing Date, among the Issuer, the Initial Guarantors party thereto, and Wilmington Trust FSB, as trustee, as the same may be amended from time to time in accordance with the terms thereof.

Indenture. Means the Indenture, dated as of April 23, 2007, between the Company and The Bank of New York, as amended and supplemented from time to time in accordance with its terms.

Indenture. Shall mean the Indenture, dated as of May 2, 2005 among the Company, each Guarantor and the Trustee, as the same shall be amended and supplemented from time to time.

Indenture. Shall mean the Indenture, dated as of September 30, 2009, among the Company, the Guarantors and the Trustee, as the same shall be amended and supplemented from time to time.

Indenture. Shall mean the Indenture, dated as of July 21, 2004, between the Company and Deutsche Bank Trust Company Americas, as Trustee, as supplemented by the First Supplemental Indenture, dated as of July 21, 2004, the Second Supplemental Indenture, dated as of July 21, 2004, and the Third Supplemental Indenture, dated as of July 21, 2004, as the same shall be amended or supplemented from time to time by one or more supplemental indentures or other instruments.

Indenture. Shall mean the Amended and Restated Indenture, dated as of September 11, 2003, between the Company and BNY Midwest Trust Company, as Trustee, as the same shall be amended from time to time.

Indenture. Shall mean the Indenture, dated as of the Closing Date, between the Company and Wilmington Trust FSB, as Trustee, governing the Company's $250,000,000 initial principal amount of 10.50% Senior Notes due 2020, as the same shall be amended or supplemented from time to time.

Indenture. Shall mean the Indenture relating to the Securities, dated as of December 10, 2010, among the Company, the Guarantors and Wilmington Trust Company, as trustee, and as the same may be amended and supplemented from time to time in accordance with the terms thereof. 2

Indenture. The Indenture (as amended, modified or supplemented from time to time), dated as of October 30, 2001, among InSight, as issuer, the Company and the subsidiaries listed in the preamble thereto, as guarantors, and U.S. Bank Trust National Association, as trustee or any successor trustee.