1. NATURE OF BUSINESS AND BASIS OF PRESENTATION (Details Narrative) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Nature Of Business And Basis Of Presentation Details Narrative
Howard G. Berger, M.D.- President and Chief Executive Officer RadNet stock ownership	0.135
Howard G. Berger, M.D.- President and Chief Executive Officer BRMG stock ownership	0.99
BRMG revenues	$ 17,400	$ 12,700
BRMG operating expenses	80,600	63,100
Management services provided to BRMG	63,200	50,400
BRMG accounts receivable	60,500		51,800
BRMG accounts payable	8,800		6,300
Working capital	$ 39,200		$ 37,300