----

----

| 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      FinancialOfficer |

| 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 MEDICINEIMAGING      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 and a Lender                |
|                                      |
| By:                                       | /s/ GENERAL ELECTRIC CAPITAL      CORPORATION |
|                                      | Duly      Authorized Signatory |

----

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

----