EXHIBIT 21
SUBSIDIARIES
REGISTRANT'S PERCENTAGE STATE OF
SUBSIDIARIES OWNERSHIP INCORPORATION
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RadNet Management, Inc. 100% California
RadNet Managed Imaging Services, Inc. 100% California
Diagnostic Imaging Services, Inc. 100% Delaware
Primedex Corporation 100% California
Radnet Management I, Inc. 100% California
Radnet Management II, Inc. 100% California
Radnet Sub, Inc. 100% California
SoCal MR Site Management, Inc. 100% California
FRI, Inc. 100% California
Radiologix, Inc. 100% Delaware
Advanced Imaging Partners, Inc. 100% Delaware
Ide Imaging Partners, Inc. 100% Delaware
Mid Rockland Imaging Partners, Inc. 100% Delaware
Pacific Imaging Partners, Inc. 100% California
Questar Imaging, Inc 100% Florida
Treasure Coast Imaging Partners, Inc. 100% Delaware
Community Imaging Partners, Inc. 100% Delaware
Radiology and Nuclear Medicine Imaging Partners, Inc. 100% Delaware
Valley Imaging Partners Inc. 100% California
Questar Duluth, Inc. 100% Florida
Questar Los Alamitos,Inc. 100% Florida
Questar Victorville, Inc. 100% Florida
Rocky Mountain OpenScan MRI, LLC 100% Colorado
FRI II, Inc 100% California
Rolling Oaks Imaging Corporation 100% California
Rolling Oaks Radiology, Inc. 100% California
Delaware Imaging Partners, Inc. 100% Delaware