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1. NATURE OF BUSINESS AND BASIS OF PRESENTATION (Details Narrative) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Nature Of Business And Basis Of Presentation Details Narrative          
Howard G. Berger, M.D.- President and Chief Executive Officer RadNet stock ownership 0.141   0.141    
Howard G. Berger, M.D.- President and Chief Executive Officer BRMG stock ownership 0.99   0.99    
BRMG revenues $ 15,000 $ 13,000 $ 41,400 $ 40,600  
BRMG operating expenses 15,000 13,000 41,400 40,600  
Management services provided to BRMG 53,000 47,000 156,600 142,500  
Working capital balance 31,300   31,300   30,000
Outstanding Senior Notes Indebtness 200,000   200,000    
Senior Secured Credit Facilities 277,900   277,900    
Revolving Credit Facility outstanding amount $ 59,800   $ 59,800   $ 614,500