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Michigan’s Standard of Care Patient Exposure Values

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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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