**Exhibit 21.1**

 

**September 15,2008**

 
| **NAME OF SUBSIDIARY**                  | ** ** | **STATE OF ORGANIZATION** |
|---------------------------------------------------|------------|-------------------------------------|
|                                              |       |                                |
| Berwyn  Magnetic Resonance Center, L.L.C.         |       |                                | Illinois |
| Comprehensive  Medical Imaging, Inc.         |       |                                | Delaware |
| Comprehensive  Medical Imaging Centers, Inc. |       |                                | Delaware |
| Comprehensive  Medical Imaging-Fairfax, Inc. |       |                                | Delaware |
| Comprehensive  OPEN MRI-Carmichael/Folsom, LLC    |       |                                | California |
| Encinitas  Imaging Center, LLC                    |       |                                | California |
| East  Bay Medical Imaging, LLC                    |       |                                | California |
| Garfield  Imaging Center, Ltd.                    |       |                                | California |
| InSight  Health Corp.                             |       |                                | Delaware |
| InSight  Health Services Corp.                    |       |                                | Delaware |
| InSight-Premier  Health, LLC                      |       |                                | Maine |
| InSight  ProScan, LLC                             |       |                                | Ohio |
| Jefferson  MRI                                    |       |                                | Texas |
| Jefferson  MRI-Bala                               |       |                                | Texas |
| Kessler  Imaging Associates, LLC                  |       |                                | New  Jersey |
| Los  Gatos Imaging Center                         |       |                                | Texas |
| Maxum  Health Corp.                               |       |                                | Delaware |
| Maxum  Health Services Corp.                      |       |                                | Delaware |
| Maxum  Health Services of Dallas, Inc.       |       |                                | Texas |
| Maxum  Health Services of North Texas, Inc.  |       |                                | Texas |
| Mesa  MRI                                         |       |                                | Texas |
| Mountain  View MRI                                |       |                                | Texas |
| MRI  Associates, L.P.                             |       |                                | Indiana |
| NDDC, Inc.                                   |       |                                | Texas |
| Open  MRI, Inc.                              |       |                                | Delaware |
| Orange  County Regional PET Center-Irvine, LLC    |       |                                | California |
| Parkway  Imaging Center, LLC                      |       |                                | Nevada |
| Phoenix  Regional PET Center-Thunderbird, LLC     |       |                                | Arizona |
| San  Fernando Valley Regional PET Center, LLC     |       |                                | California |
| Signal  Medical Services, Inc.               |       |                                | Delaware |
| St.  John’s Regional Imaging Center, LLC     |       |                                | California |
| Syncor  Diagnostics Bakersfield, LLC              |       |                                | California |
| Syncor  Diagnostics Sacramento, LLC               |       |                                | California |
| TME  Arizona, Inc                                 |       |                                | Texas |
| Western  New York Imaging, LLC                    |       |                                | New  York |
| Valencia  MRI, LLC                                |       |                                | California |
| Wilkes-Barre  Imaging, LLC                        |       |                                | Pennsylvania |
| Woodbridge  MRI                                   |       |                                | Texas |

 

----