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Against

The rapid expansion of CT can be adequately justified through the existing framework of referral criteria. Against. Walter Huda PhD Medical University of South Carolina.

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Against

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  1. The rapid expansion of CT can be adequately justified through the existing framework of referral criteria

  2. Against Walter Huda PhD Medical University of South Carolina

  3. FINANCIAL DISCLOSURESResearch Support (Siemens)Consultant (Siemens)Book Royalties (LWW, MPP)President (Huda Physics in Medicine)

  4. BACKGROUND

  5. 1980’s …….. 3.6 mSv/year

  6. US Medical Per Caput Dose ~ 0.6 mSv in 1980

  7. 2006 ……….. ~ 6 mSv/year

  8. US Medical Per Caput Dose ~ 3 mSv in 2006

  9. Accepted Radiological Wisdom

  10. CTDIvol ~ 15 mGy + DLP ~ 500 mGy-cm Effective dose ~ 10 mSv

  11. Assume that radiation risks are real because: Cautionary Principle ICRP/UNSCEAR/BEIR (No Threshold)

  12. Justified Optimized

  13. 10 mSv + ICRP risk factors ~ 0.04% cancer fatality ~ 0.06% detriment ~ 0.1% cancer induction

  14. ? Can we do better `?

  15. Benefits > Radiation Risks Eliminate Unnecessary Radiation (Risks)

  16. Cancers/mGy-cm/100,000

  17. RADIATION RISK CAVEATS Latent period Differences in life expectancy of “patients” and normal population Risk Uncertainties

  18. SUMMARY

  19. Understand (Any) Radiation Risks in CT Improve Ability to Justify/Optimize

  20. Thank You Reprint requests: huda@musc.edu

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