8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): November 21, 2011

RadNet, Inc.

(Exact name of registrant as specified in its charter)

Delaware	0-19019	13-3326724
(State or other jurisdiction of incorporation)	(Commission File Number)	(IRS Employer Identification Number)

1510 Cotner Avenue

Los Angeles, California  90025

(Address of Principal Executive Offices) (Zip Code)

(310) 478-7808

(Registrant’s Telephone Number, Including Area Code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 1.01 Entry Into a Material Definitive Agreement.

On November 21, 2011, pursuant to that certain Indenture (the “Indenture”), dated as of April 6, 2010, by and among RadNet, Inc., a Delaware corporation, Radnet Management, Inc., a California corporation (“Radnet Management”), U.S. Bank National Association, as Trustee, and each of the guarantors party thereto, the following wholly owned subsidiaries (the “Guarantor Subsidiaries”) of Radnet Management entered into Supplemental Indentures (collectively, the “Supplemental Indentures”): (i) Raven Holdings U.S., Inc., a Delaware corporation; (ii) American Radiology Services of Delaware, Inc., a Delaware corporation; (iii) CML HealthCare Rhode Island LLC, a Delaware limited liability company; (iv) American Radiology Services LLC, a Delaware limited liability company; and (v) Radiology Alliance Delivery System, LLC, a Maryland limited liability company.

Pursuant to the Supplemental Indentures, the Guarantor Subsidiaries unconditionally guaranteed the $200,000,000 aggregate principal amount of 10⅜% Senior Notes due 2018 issued by Radnet Management under the Indenture.

The description of the Supplemental Indentures contained herein is qualified in its entirety by reference to the Supplemental Indentures, copies of which are filed herewith as Exhibits 10.1, 10.2, 10.3, 10.4 and 10.5 and are incorporated herein by reference.

Item 2.03 Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant.

The information set forth above under Item 1.01 of this Current Report on Form 8-K is hereby incorporated by reference into this Item 2.03.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

The following exhibits are attached to this Current Report on Form 8-K:

Exhibit No.	Description
10.1	Supplemental Indenture, dated as of November 21, 2011, among Raven Holdings U.S., Inc., Radnet Management, Inc., RadNet, Inc., U.S. Bank and the other parties named therein.
10.2	Supplemental Indenture, dated as of November 21, 2011, among American Radiology Services of Delaware, Inc., Radnet Management, Inc., RadNet, Inc., U.S. Bank and the other parties named therein..
10.3	Supplemental Indenture, dated as of November 21, 2011, among CML HealthCare Rhode Island LLC,  Radnet Management, Inc., RadNet, Inc., U.S. Bank and the other parties named therein.
10.4	Supplemental Indenture, dated as of November 21, 2011, among American Radiology Services LLC, Radnet Management, Inc., RadNet, Inc., U.S. Bank and the other parties named therein.
10.5	Supplemental Indenture, dated as of November 21, 2011, among Radiology Alliance Delivery System, LLC, Radnet Management, Inc., RadNet, Inc., U.S. Bank and the other parties named therein.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereto duly authorized.

RADNET, INC.
By:	/S/ JEFFREY L. LINDEN
Name:	Jeffrey L. Linden
Title:	Executive Vice President and General Counsel

Date: November 22, 2011

EX-10.1

Exhibit 10.1

SUPPLEMENTAL INDENTURE

Supplemental Indenture (this “Supplemental Indenture”), dated as of November 21, 2011, among Raven Holdings U.S., Inc., a Delaware corporation (the “Guaranteeing Subsidiary”), a subsidiary of RadNet, Inc. (or its permitted successor), a Delaware corporation (“Parent”), Radnet Management, Inc., a California corporation (the “Issuer), the other Guarantors (as defined in the Indenture referred to herein) and U.S. Bank National Association, as trustee under the Indenture referred to below (the “Trustee”).

WITNESSETH

WHEREAS, the Issuer has heretofore executed and delivered to the Trustee an indenture (the “Indenture”), dated as of April 6, 2010, providing for the issuance of 10⅜% Senior Notes due 2018 (the “Notes”);

WHEREAS, the Indenture provides that under certain circumstances the Guaranteeing Subsidiary shall execute and deliver to the Trustee a supplemental indenture pursuant to which the Guaranteeing Subsidiary shall unconditionally guarantee all of the Issuer’s Obligations under the Notes and the Indenture on the terms and conditions set forth herein (the “Note Guarantee”); and

WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is authorized to execute and deliver this Supplemental Indenture.

NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the Guaranteeing Subsidiary and the Trustee mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows:

1.           Capitalized Terms.  Capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture.

2.           Agreement to Guarantee.  The Guaranteeing Subsidiary hereby agrees to provide an unconditional Guarantee on the terms and subject to the conditions set forth in the Note Guarantee and in the Indenture including but not limited to Article 10 thereof.

4.           No Recourse Against Others.  No director, officer, employee, stockholder, general or limited partner or incorporator of the Issuers or any Guarantor, as such, shall have any liability for any obligations of the Issuers or the Guarantors under the Notes, this Indenture, the Note Guarantees or the note documents or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder of Notes by accepting a Note waives and releases all such liability. The waiver and release are part of the consideration for issuance of the Notes. The waiver may not be effective to waive liabilities under the federal securities laws.

5.           NEW YORK LAW TO GOVERN.  THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY.

6.           Counterparts.  The parties may sign any number of copies of this Supplemental Indenture.  Each signed copy shall be an original, but all of them together represent the same agreement.

7.           Effect of Headings.  The Section headings herein are for convenience only and shall not affect the construction hereof.

8.            The Trustee.  The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the Guaranteeing Subsidiary and the Issuer.

IN WITNESS WHEREOF, the undersigned have executed this Supplemental Indenture as of the date first set forth above.

RAVEN HOLDINGS U.S., INC.
By:	/S/ HOWARD G. BERGER, M.D.
	Name: Howard G. Berger, M.D.
	Title:  President and Treasurer

PARENT, ISSUER AND OTHER GUARANTORS
By:	/S/ HOWARD G. BERGER, M.D.
	Name:  Howard G. Berger, M.D
	Title: Authorized Officer of Parent, Issuer and the other Guarantors

[Signature Page to Supplemental Indenture - Raven Holdings U.S., Inc.]

 U.S. BANK NATIONAL ASSOCIATION,

as Trustee

By: /S/ GEORGINA THOMAS

       Name:  Georgina Thomas

       Title:  Trust Officer

[Signature Page to Supplemental Indenture - Raven Holdings U.S., Inc.]

EX-10.2

Exhibit 10.2

SUPPLEMENTAL INDENTURE

Supplemental Indenture (this “Supplemental Indenture”), dated as of November 21, 2011, among American Radiology Services of Delaware, Inc., a Delaware corporation (the “Guaranteeing Subsidiary”), a subsidiary of RadNet, Inc. (or its permitted successor), a Delaware corporation (“Parent”), Radnet Management, Inc., a California corporation (the “Issuer), the other Guarantors (as defined in the Indenture referred to herein) and U.S. Bank National Association, as trustee under the Indenture referred to below (the “Trustee”).

WITNESSETH

WHEREAS, the Issuer has heretofore executed and delivered to the Trustee an indenture (the “Indenture”), dated as of April 6, 2010, providing for the issuance of 10⅜% Senior Notes due 2018 (the “Notes”);

WHEREAS, the Indenture provides that under certain circumstances the Guaranteeing Subsidiary shall execute and deliver to the Trustee a supplemental indenture pursuant to which the Guaranteeing Subsidiary shall unconditionally guarantee all of the Issuer’s Obligations under the Notes and the Indenture on the terms and conditions set forth herein (the “Note Guarantee”); and

WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is authorized to execute and deliver this Supplemental Indenture.

NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the Guaranteeing Subsidiary and the Trustee mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows:

1.           Capitalized Terms.  Capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture.

2.           Agreement to Guarantee.  The Guaranteeing Subsidiary hereby agrees to provide an unconditional Guarantee on the terms and subject to the conditions set forth in the Note Guarantee and in the Indenture including but not limited to Article 10 thereof.

4.           No Recourse Against Others.  No director, officer, employee, stockholder, general or limited partner or incorporator of the Issuers or any Guarantor, as such, shall have any liability for any obligations of the Issuers or the Guarantors under the Notes, this Indenture, the Note Guarantees or the note documents or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder of Notes by accepting a Note waives and releases all such liability. The waiver and release are part of the consideration for issuance of the Notes. The waiver may not be effective to waive liabilities under the federal securities laws.

5.           NEW YORK LAW TO GOVERN.  THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY.

6.           Counterparts.  The parties may sign any number of copies of this Supplemental Indenture.  Each signed copy shall be an original, but all of them together represent the same agreement.

7.           Effect of Headings.  The Section headings herein are for convenience only and shall not affect the construction hereof.

8.            The Trustee.  The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the Guaranteeing Subsidiary and the Issuer.

IN WITNESS WHEREOF, the undersigned have executed this Supplemental Indenture as of the date first set forth above.

AMERICAN RADIOLOGY SERVICES OF DELAWARE, INC.

By:  /S/ HOWARD G. BERGER, M.D.

         Name:  Howard G. Berger, M.D.

              Title:President and Treasurer

PARENT, ISSUER AND OTHER GUARANTORS

By: /S/ HOWARD G. BERGER, M.D.

         Name:   Howard G. Berger, M.D.

                  Title:   Authorized Officer of Parent, Issuer and the other Guarantors

[Signature Page to Supplemental Indenture - American Radiology Services of Delaware, Inc.]

U.S. BANK NATIONAL ASSOCIATION,

as Trustee

By:    /S/ GEORGINA THOMAS

          Name:  Georgina Thomas

          Title:  Trust Officer

[Signature Page to Supplemental Indenture - American Radiology Services of Delaware, Inc.]

EX-10.3

Exhibit 10.3

SUPPLEMENTAL INDENTURE

Supplemental Indenture (this “Supplemental Indenture”), dated as of November 21, 2011, among CML HealthCare Rhode Island LLC, a Delaware limited liability company (the “Guaranteeing Subsidiary”), a subsidiary of RadNet, Inc. (or its permitted successor), a Delaware corporation (“Parent”), Radnet Management, Inc., a California corporation (the “Issuer), the other Guarantors (as defined in the Indenture referred to herein) and U.S. Bank National Association, as trustee under the Indenture referred to below (the “Trustee”).

WITNESSETH

WHEREAS, the Issuer has heretofore executed and delivered to the Trustee an indenture (the “Indenture”), dated as of April 6, 2010, providing for the issuance of 10⅜% Senior Notes due 2018 (the “Notes”);

WHEREAS, the Indenture provides that under certain circumstances the Guaranteeing Subsidiary shall execute and deliver to the Trustee a supplemental indenture pursuant to which the Guaranteeing Subsidiary shall unconditionally guarantee all of the Issuer’s Obligations under the Notes and the Indenture on the terms and conditions set forth herein (the “Note Guarantee”); and

WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is authorized to execute and deliver this Supplemental Indenture.

NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the Guaranteeing Subsidiary and the Trustee mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows:

1.           Capitalized Terms.  Capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture.

2.           Agreement to Guarantee.  The Guaranteeing Subsidiary hereby agrees to provide an unconditional Guarantee on the terms and subject to the conditions set forth in the Note Guarantee and in the Indenture including but not limited to Article 10 thereof.

4.           No Recourse Against Others.  No director, officer, employee, stockholder, general or limited partner or incorporator of the Issuers or any Guarantor, as such, shall have any liability for any obligations of the Issuers or the Guarantors under the Notes, this Indenture, the Note Guarantees or the note documents or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder of Notes by accepting a Note waives and releases all such liability. The waiver and release are part of the consideration for issuance of the Notes. The waiver may not be effective to waive liabilities under the federal securities laws.

5.           NEW YORK LAW TO GOVERN.  THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY.

6.           Counterparts.  The parties may sign any number of copies of this Supplemental Indenture.  Each signed copy shall be an original, but all of them together represent the same agreement.

7.           Effect of Headings.  The Section headings herein are for convenience only and shall not affect the construction hereof.

8.            The Trustee.  The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the Guaranteeing Subsidiary and the Issuer.

IN WITNESS WHEREOF, the undersigned have executed this Supplemental Indenture as of the date first set forth above.

CML HEALTHCARE RHODE ISLAND LLC

By:    /S/ HOWARD G. BERGER, M.D.

          Name:  Howard G. Berger, M.D.

             Title:    President and Treasurer

PARENT, ISSUER AND OTHER GUARANTORS

By:    /S/ HOWARD G. BERGER, M.D.

          Name:  Howard G. Berger, M.D.

            Title:     Authorized Officer of Parent, Issuer and the other Guarantors

[Signature Page to Supplemental Indenture - CML HealthCare Rhode Island LLC]

U.S. BANK NATIONAL ASSOCIATION,

as Trustee

By:     /S/ GEORGINA THOMAS

           Name: Georgina Thomas

                Title: Trust Officer

[Signature Page to Supplemental Indenture - CML HealthCare Rhode Island LLC]

EX-10.4

Exhibit 10.4

SUPPLEMENTAL INDENTURE

Supplemental Indenture (this “Supplemental Indenture”), dated as of November 21, 2011, among American Radiology Services LLC, a Delaware limited liability company (the “Guaranteeing Subsidiary”), a subsidiary of RadNet, Inc. (or its permitted successor), a Delaware corporation (“Parent”), Radnet Management, Inc., a California corporation (the “Issuer), the other Guarantors (as defined in the Indenture referred to herein) and U.S. Bank National Association, as trustee under the Indenture referred to below (the “Trustee”).

WITNESSETH

WHEREAS, the Issuer has heretofore executed and delivered to the Trustee an indenture (the “Indenture”), dated as of April 6, 2010, providing for the issuance of 10⅜% Senior Notes due 2018 (the “Notes”);

WHEREAS, the Indenture provides that under certain circumstances the Guaranteeing Subsidiary shall execute and deliver to the Trustee a supplemental indenture pursuant to which the Guaranteeing Subsidiary shall unconditionally guarantee all of the Issuer’s Obligations under the Notes and the Indenture on the terms and conditions set forth herein (the “Note Guarantee”); and

WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is authorized to execute and deliver this Supplemental Indenture.

NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the Guaranteeing Subsidiary and the Trustee mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows:

1.           Capitalized Terms.  Capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture.

2.           Agreement to Guarantee.  The Guaranteeing Subsidiary hereby agrees to provide an unconditional Guarantee on the terms and subject to the conditions set forth in the Note Guarantee and in the Indenture including but not limited to Article 10 thereof.

4.           No Recourse Against Others.  No director, officer, employee, stockholder, general or limited partner or incorporator of the Issuers or any Guarantor, as such, shall have any liability for any obligations of the Issuers or the Guarantors under the Notes, this Indenture, the Note Guarantees or the note documents or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder of Notes by accepting a Note waives and releases all such liability. The waiver and release are part of the consideration for issuance of the Notes. The waiver may not be effective to waive liabilities under the federal securities laws.

5.           NEW YORK LAW TO GOVERN.  THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY.

6.           Counterparts.  The parties may sign any number of copies of this Supplemental Indenture.  Each signed copy shall be an original, but all of them together represent the same agreement.

7.           Effect of Headings.  The Section headings herein are for convenience only and shall not affect the construction hereof.

8.            The Trustee.  The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the Guaranteeing Subsidiary and the Issuer.

IN WITNESS WHEREOF, the undersigned have executed this Supplemental Indenture as of the date first set forth above.

AMERICAN RADIOLOGY SERVICES LLC

By:     /S/ HOWARD G. BERGER, M.D.

         Name:  Howard G. Berger, M.D.

             Title:  President and Treasurer

PARENT, ISSUER AND OTHER GUARANTORS

By:     /S/ HOWARD G. BERGER, M.D.

          Name:  Howard G. Berger, M.D.

              Title:  Authorized Officer of Parent, Issuer and the other Guarantors

[Signature Page to Supplemental Indenture - American Radiology Services LLC]

U.S. BANK NATIONAL ASSOCIATION,

as Trustee

By:     /S/ GEORGINA THOMAS

         Name: Georgina Thomas

              Title: Trust Officer

[Signature Page to Supplemental Indenture - American Radiology Services LLC]

EX-10.5

SUPPLEMENTAL INDENTURE

Supplemental Indenture (this “Supplemental Indenture”), dated as of November 21, 2011, among Radiology Alliance Delivery System, LLC, a Maryland limited liability company (the “Guaranteeing Subsidiary”), a subsidiary of RadNet, Inc. (or its permitted successor), a Delaware corporation (“Parent”), Radnet Management, Inc., a California corporation (the “Issuer), the other Guarantors (as defined in the Indenture referred to herein) and U.S. Bank National Association, as trustee under the Indenture referred to below (the “Trustee”).

WITNESSETH

WHEREAS, the Issuer has heretofore executed and delivered to the Trustee an indenture (the “Indenture”), dated as of April 6, 2010, providing for the issuance of 10⅜% Senior Notes due 2018 (the “Notes”);

WHEREAS, the Indenture provides that under certain circumstances the Guaranteeing Subsidiary shall execute and deliver to the Trustee a supplemental indenture pursuant to which the Guaranteeing Subsidiary shall unconditionally guarantee all of the Issuer’s Obligations under the Notes and the Indenture on the terms and conditions set forth herein (the “Note Guarantee”); and

WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is authorized to execute and deliver this Supplemental Indenture.

NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the Guaranteeing Subsidiary and the Trustee mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows:

1.           Capitalized Terms.  Capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture.

2.           Agreement to Guarantee.  The Guaranteeing Subsidiary hereby agrees to provide an unconditional Guarantee on the terms and subject to the conditions set forth in the Note Guarantee and in the Indenture including but not limited to Article 10 thereof.

4.           No Recourse Against Others.  No director, officer, employee, stockholder, general or limited partner or incorporator of the Issuers or any Guarantor, as such, shall have any liability for any obligations of the Issuers or the Guarantors under the Notes, this Indenture, the Note Guarantees or the note documents or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder of Notes by accepting a Note waives and releases all such liability. The waiver and release are part of the consideration for issuance of the Notes. The waiver may not be effective to waive liabilities under the federal securities laws.

5.           NEW YORK LAW TO GOVERN.  THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY.

6.           Counterparts.  The parties may sign any number of copies of this Supplemental Indenture.  Each signed copy shall be an original, but all of them together represent the same agreement.

7.           Effect of Headings.  The Section headings herein are for convenience only and shall not affect the construction hereof.

8.            The Trustee.  The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the Guaranteeing Subsidiary and the Issuer.

IN WITNESS WHEREOF, the undersigned have executed this Supplemental Indenture as of the date first set forth above.

RADIOLOGY ALLIANCE DELIVERY SYSTEM, LLC

By:     /S/ HOWARD G. BERGER, M.D.

           Name:   Howard G. Berger, M.D.

              Title:   President and Treasurer

PARENT, ISSUER AND OTHER GUARANTORS

By:     /S/ HOWARD G. BERGER, M.D.

           Name:  Howard G. Berger, M.D.

              Title:   Authorized Officer of Parent, Issuer and the other Guarantors

[Signature Page to Supplemental Indenture - Radiology Alliance Delivery System, LLC]

U.S. BANK NATIONAL ASSOCIATION,

      as Trustee

By:    /S/ GEORGINA THOMAS

          Name:  Georgina Thomas

           Title:  Trust Officer

[Signature Page to Supplemental Indenture - Radiology Alliance Delivery System, LLC]