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Use Trends and Geographic Variation in Neuroimaging: Nationwide Medicare Data for 1993 and 1998

Vijay M. Raoa, Laurence Parkera, David C. Levina, Jonathan Sunshinea and Gerald Busheea

a From the Department of Radiology (V.M.R., L.P., D.C.L.), Thomas Jefferson University Hospital, Philadelphia, PA; and the American College of Radiology (J.S., G.B.), Reston, VA.



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  		FIG 1. Map of the United States depicts the 10 HCFA regions. The use rate of MR angiography per 100,000 Medicare beneficiaries is shown in each region





Copyright © 2009 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X