----

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|   | RADNET      MANAGEMENT, INC.                                          |                 |
|--------|-----------------------------------------------------------------------|----------------------|
|   |                                                                  |                 |   |
|   | By:                                                                   | /s/ Howard G. Berger |   |
|   | Name:       Howard      G. Berger, M.D.                          |                 |
|   | Title:       President                                           |                 |
|   |                                                                  |                 |   |
|   | PRIMEDEX      HEALTH SYSTEMS, INC.                                    |                 |
|   |                                                                  |                 |   |
|   | By:                                                                   | /s/ Howard G. Berger |   |
|   | Name:       Howard      G. Berger, M.D.                          |                 |
|   | Title:       President                                           |                 |
|   |                                                                  |                 |   |
|   | BEVERLY      RADIOLOGY MEDICAL GROUPIII                               |
|   |                                                                  |                 |   |
|   | By:      ProNet Imaging Medical Group, Inc., itsgeneral partner       |                 |
|   |                                                                  |                 |   |
|   | By:                                                                   | /s/ Howard G. Berger |   |
|   | Name:       Howard      G. Berger, M.D.                          |                 |
|   | Title:       President                                           |                 |
|   |                                                                  |                 |   |
|   | By:      Beverly Radiology Medical Group, Inc., itsgeneral    partner |                 |
|   |                                                                  |                 |   |
|   | By:                                                                   | /s/ Howard G. Berger |   |
|   | Name:       Howard      G. Berger, M.D.                          |                 |
|   | Title:       President                                           |                 |
|   |                                                                  |                 |   |
|   | PRONET      IMAGING MEDICAL GROUP, INC.                               |
|   |                                                                  |                 |   |
|   | By:                                                                   | /s/ Howard G. Berger |   |
|   | Name:       Howard      G. Berger, M.D.                          |                 |
|   | Title:       President                                           |                 |

----

|   | BEVERLY      RADIOLOGY MEDICAL GROUP,INC.    |
|--------|----------------------------------------------|
|   |                                         |   |   |
|   | By:                                          | /s/ Howard G. Berger |   |
|   | Name:       Howard      G. Berger, M.D. |   |
|   | Title:      President                        |   |
|   |                                         |   |   |
|   | RADNET      SUB, INC.                        |   |
|   |                                         |   |   |
|   | By:                                          | /s/ Howard G. Berger |   |
|   | Name:       Howard      G. Berger, M.D. |   |
|   | Title:      President                        |   |
|   |                                         |   |   |
|   | SO      CAL MR SITE MANAGEMENT, INC.         |
|   |                                         |   |   |
|   | By:                                          | /s/ Howard G. Berger |   |
|   | Name:       Howard      G. Berger, M.D. |   |
|   | Title:      President                        |   |
|   |                                         |   |   |
|   | RADNET      MANAGEMENT I, INC.               |
|   |                                         |   |   |
|   | By:                                          | /s/ Howard G. Berger |   |
|   | Name:       Howard      G. Berger, M.D. |   |
|   | Title:      President                        |   |

|   |                                         |                 |
|--------|----------------------------------------------|----------------------|
|   | RADNET      MANAGEMENT II, INC.              |                 |
|   |                                         |                 |   |
|   | By:                                          | /s/ Howard G. Berger |   |
|   | Name:       Howard      G. Berger, M.D. |                 |
|   | Title:      President                        |                 |

----

|        | RADNET      MANAGED IMAGINGSERVICES, INC.    |                 |
|--------|----------------------------------------------|----------------------|
|   |                                         |                 |   |
|   | By:                                          | /s/ Howard G. Berger |   |
|   | Name:       Howard      G. Berger, M.D. |                 |
|   | Title:      President                        |                 |
|   |                                         |                 |   |
|   | DIAGNOSTIC      IMAGING SERVICES, INC.       |                 |
|   |                                         |                 |   |
|   | By:                                          | /s/ Howard G. Berger |    |
|   | Name:       Howard      G. Berger, M.D. |                 |
|   | Title:      Chief Financial    Officer       |                 |
|   |                                         |                 |   |
|   | RADIOLOGIX,      INC.                        |                 |
|   |                                         |                 |   |
|   | By:                                          | /s/ Howard G. Berger |    |
|   | Name:       Howard      G. Berger, M.D. |                 |
|   | Title:      President                        |                 |
|   |                                         |                 |   |
|   | ADVANCED      IMAGING PARTNERS, INC.         |                 |
|   |                                         |                 |   |
|   | By:                                          | /s/ Howard G. Berger |    |
|   | Name:       Howard      G. Berger, M.D. |                 |
|   | Title:      President                        |                 |

|   |                                         |                 |
|--------|----------------------------------------------|----------------------|
|   | IDE      IMAGING PARTNERS, INC.              |                 |
|   |                                         |                 |   |
|   | By:                                          | /s/ Howard G. Berger |   |
|   | Name:       Howard      G. Berger, M.D. |                 |
|   | Title:      President                        |                 |

----

|        | MID      ROCKLAND IMAGING PARTNERS,INC.      |                 |
|--------|----------------------------------------------|----------------------|
|   |                                         |                 |   |
|   | By:                                          | /s/ Howard G. Berger |   |
|   | Name:       Howard      G. Berger, M.D. |                 |
|   | Title:      President                        |                 |
|   |                                         |                 |   |
|   | PACIFIC      IMAGING PARTNERS, INC.          |                 |
|   |                                         |                 |   |
|   | By:                                          | /s/ Howard G. Berger |   |
|   | Name:       Howard      G. Berger, M.D. |                 |
|   | Title:      President                        |                 |
|   |                                         |                 |   |
|   | QUESTAR      IMAGING, INC.                   |                 |
|   |                                         |                 |   |
|   | By:                                          | /s/ Howard G. Berger |   |
|   | Name:       Howard      G. Berger, M.D. |                 |
|   | Title:      President                        |                 |
|   |                                         |                 |   |
|   | TREASURE      COAST IMAGING PARTNERS,INC.    |                 |
|   |                                         |                 |   |
|   | By:                                          | /s/ Howard G. Berger |   |
|   | Name:       Howard      G. Berger, M.D. |                 |
|   | Title:      President                        |                 |

|   |                                         |                 |
|--------|----------------------------------------------|----------------------|
|   | COMMUNITY IMAGING      PARTNERS, INC.   |                 |
|   |                                         |                 |   |
|   | By:                                          | /s/ Howard G. Berger |    |
|   | Name:       Howard      G. Berger, M.D. |                 |
|   | Title:      President                        |                 |

----

|   | RADIOLOGY      AND NUCLEAR MEDICINE          |                 |
|--------|----------------------------------------------|----------------------|
|   | IMAGING      PARTNERS, INC.                  |                 |
|   |                                         |                 |   |
|   | By:                                          | /s/ Howard G. Berger |          |
|   | Name:       Howard      G. Berger, M.D. |                 |
|   | Title:      President                        |                 |
|   |                                         |                 |   |
|   | VALLEY      IMAGING PARTNERS, INC.           |                 |
|   |                                         |                 |   |
|   | By:                                          | /s/ Howard G. Berger |   |
|   | Name:       Howard      G. Berger, M.D. |                 |
|   | Title:      President                        |                 |
|   |                                         |                 |   |
|   | QUESTAR      DULUTH, INC.                    |                 |
|   |                                         |                 |   |
|   | By:                                          | /s/ Howard G. Berger |    |
|   | Name:       Howard      G. Berger, M.D. |                 |
|   | Title:      President                        |                 |
|   |                                         |                 |   |
|   | QUESTAR      LOS ALAMITOS, INC.              |                 |
|   |                                         |                 |   |
|   | By:                                          | /s/ Howard G. Berger |   |
|   | Name:       Howard      G. Berger, M.D. |                 |
|   | Title:      President                        |                 |
|   |                                         |                 |   |
|   | QUESTAR      VICTORVILLE, INC.               |                 |
|   |                                         |                 |   |
|   | By:                                          | /s/ Howard G. Berger |   |
|   | Name:       Howard      G. Berger, M.D. |                 |
|   | Title:      President                        |                 |

----

|   | ROCKY      MOUNTAIN OPENSCAN MRI, LLC        |
|--------|----------------------------------------------|
|   |                                         |   |
|   | By:                                          | /s/      Howard G. Berger |   |
|   | Name:       Howard      G. Berger, M.D. |   |
|   | Title:      President                        |   |
|   |                                         |   |
|   | FRI,      INC.                               |   |
|   |                                         |   |
|   | By:                                          | /s/      Howard G. Berger |   |
|   | Name:       Howard      G. Berger, M.D. |   |
|   | Title:      President                        |   |

----

|   | GENERAL      ELECTRIC CAPITALCORPORATION, |                                          |
|--------|-------------------------------------------|-----------------------------------------------|
|   | as      Agent                        |                                          |
|   |                                      |                                          |
|   | By:                                       | /s/ General      Electric Capital Corporation |          |
|   |                                      | Duly      Authorized Signatory                |   |

----

|   | [INSERT      NAME OF LENDER], as a      Lender |         |
|--------|------------------------------------------------|--------------|
|   |                                           |         |
|   | By:                                            |         |          |
|   | Name:                                          |    |          |
|   | Title:                                         |    |          |

----