1. Blue Cross Blue Shield Association. Medical technology as a driver of health care costs: diagnostic imaging. Available at: http://www.bcbs.com/coststudies/reports/Medical_Tech_Drivr_Rept_10.pdf.
2. Medicare Payment Advisory Commission. Report to the Congress: Medicare payment policy. Available at: http://www.medpac.gov/publications/congressional_reports/Mar05_EntireReport.pdf. Accessed May 1, 2006.
3. Testimony to the Subcommittee on Health,2005
4. American College of Radiology. Cost effectiveness of imaging utilization. Available at: http://www.acr.org/s_acr/doc.asp?CID=2361&DID=6918. Accessed May 1, 2006.