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Michigan’s Standard of Care Patient Exposure Values

Michigan’s Standard of Care Patient Exposure Values. Bruce Matkovich Radiation Safety Section Michigan Department of Community Health. Exposure at Skin Entrance. Measure common radiographic projections during regulatory inspection: Common patient thicknesses

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Michigan’s Standard of Care Patient Exposure Values

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  1. Michigan’s Standard of Care Patient Exposure Values Bruce Matkovich Radiation Safety Section Michigan Department of Community Health CRCPD 38th Annual Conference - Detroit

  2. Exposure at Skin Entrance • Measure common radiographic projections during regulatory inspection: • Common patient thicknesses • Measured with MDH X-Ray Monitor • Monthly workloads collected CRCPD 38th Annual Conference - Detroit

  3. Exposure at Skin Entrance - 2 • Exposure data entered into Radiation Safety Data System • Recent update distinguishes between digital modes Computed Radiography (CR) and Direct Radiography (DR) CRCPD 38th Annual Conference - Detroit

  4. CRCPD 38th Annual Conference - Detroit

  5. Standard of Care Exposure Values • Established by advisory committee near the 85th percentile of ESE data • Last adjustment in 1995 • Mostly based on 200 speed screen-film • Non-regulatory CRCPD 38th Annual Conference - Detroit

  6. Standard of Care Exposure Values CRCPD 38th Annual Conference - Detroit

  7. Standard of Care Exposure Values and AAPM Reference Values CRCPD 38th Annual Conference - Detroit

  8. Exposures Reported to Facility • Measured Entrance at Skin Exposure along with the Standard of Care for that projection • Advised to reduce exposure if over the Standard of Care • Good cooperation from facilities in reducing exposures when appropriate CRCPD 38th Annual Conference - Detroit

  9. Exposure Distribution Graphs • Most recent 5 year period • Screen-film and digital imaging displayed separately • Number of machines tested, median exposure, and 85th percentile data included CRCPD 38th Annual Conference - Detroit

  10. CRCPD 38th Annual Conference - Detroit

  11. CRCPD 38th Annual Conference - Detroit

  12. CRCPD 38th Annual Conference - Detroit

  13. CRCPD 38th Annual Conference - Detroit

  14. CRCPD 38th Annual Conference - Detroit

  15. CRCPD 38th Annual Conference - Detroit

  16. CRCPD 38th Annual Conference - Detroit

  17. Exposure Trends • The difference between the 85th percentile and the median exposure is being reduced • “Outriders” are being becoming less of a problem CRCPD 38th Annual Conference - Detroit

  18. Trend - AP Lumbar Spine CRCPD 38th Annual Conference - Detroit

  19. Trend - AP Cervical Spine CRCPD 38th Annual Conference - Detroit

  20. Trend - PA Chest (without a grid) CRCPD 38th Annual Conference - Detroit

  21. Trend - PA Chest (with a grid) CRCPD 38th Annual Conference - Detroit

  22. Trend - DP Foot CRCPD 38th Annual Conference - Detroit

  23. Trend - Hand CRCPD 38th Annual Conference - Detroit

  24. Trend – Dental Cephalometric CRCPD 38th Annual Conference - Detroit

  25. Standard of Care Conclusions • Standard of Care values or reference values are effective in controlling exposures • They do not adversely drive exposures below what is necessary for diagnostic quality images CRCPD 38th Annual Conference - Detroit

  26. For more information: Radiation Safety Section www.michigan.gov/rss CRCPD 38th Annual Conference - Detroit

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