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Expanding CT and MR Availability, Imaging Utilization in the Medicare Population, and the Challenge of Measuring Value (Health Affairs, 2008) Laurence.

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Presentation on theme: "Expanding CT and MR Availability, Imaging Utilization in the Medicare Population, and the Challenge of Measuring Value (Health Affairs, 2008) Laurence."— Presentation transcript:

1 Expanding CT and MR Availability, Imaging Utilization in the Medicare Population, and the Challenge of Measuring Value (Health Affairs, 2008) Laurence Baker, PhD* Stanford University Scott Atlas, MD Stanford University Christopher Afendulis, PhD Harvard University *Presenter; contact:

2 The number of CT and MRI units in the U.S. has grown substantially Procedure use has also grown rapidly, in Medicare and outside

3 Each new MRI scanner is associated with 800 more Medicare MRI procedures Each new CT scanner is associated with 2500 more Medicare CT procedures

4 Substituting newer diagnostic procedures for older Expanding the set of patients receiving any diagnostic procedures Changes in side effect rates Improvements in diagnostic precision & therapy Information More Better Faster Better health outcomes The value of information Information More Better Faster Improvements in diagnostic precision & therapy Better health outcomes The value of information

5 Better Health Outcomes Impacts on Costs The Value of Information What we need Estimates of health impacts on a population basis -accounting for treatment expansion -accounting for shifts in utilization A better understanding of the value of information What we have: Studies of some specific technologies applied to some specific populations vs. If we want to compare… We need evidence

6 -68 for people newly tested -15 for people who switch from catheter based angiography -16 for people who now get both CTA and catheter-based angiography An Example: CTA for Abdominal Aortic Aneurysm 100 Additional CTA Procedures 1.1 additional people who get a therapeutic treatment CT Angiography (CTA) is a newer, less invasive, way to diagnose potential abdominal aortic aneurysms. Can substitute for catheter based angiography.


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