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5. INVESTMENT IN JOINT VENTURES (Details-Key financial data) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Key financial data for joint ventures
Current assets - joint ventures	$ 17,551
Noncurrent assets - joint ventures	87,527
Current liabilities - joint ventures	(5,044)
Noncurrent liabilities - joint ventures	(42,245)
Total net assets -joint ventures	57,789
Book value of Radnet joint venture interests	27,463
Cost in excess of book value of acquired joint venture interests	4,971
Total value of Radnet joint venture interests	32,434		$ 32,123
Total book value of other joint venture partner interests	30,326
Net revenue	85,305	$ 73,859
Net income	$ 13,489	$ 9,801

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