Michigans Standard of Care Patient Exposure Values - PowerPoint PPT Presentation

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Title:

Michigans Standard of Care Patient Exposure Values

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500 mR. AP Lumbar Spine. 25 mR. PA Chest (with a grid) 25 mR. PA ... Measured Entrance at Skin Exposure along with the Standard of Care for that projection ... – PowerPoint PPT presentation

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Learn more at: http://www.michigan.gov
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Title: Michigans Standard of Care Patient Exposure Values


1
Michigans Standard of Care Patient Exposure
Values
  • Bruce Matkovich
  • Radiation Safety Section
  • Michigan Department of Community Health

2
Exposure at Skin Entrance
  • Measure common radiographic projections during
    regulatory inspection
  • Common patient thicknesses
  • Measured with MDH X-Ray Monitor
  • Monthly workloads collected

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)

4
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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

6
Standard of Care Exposure Values
7
Standard of Care Exposure Values and AAPM
Reference Values
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

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

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17
Exposure Trends
  • The difference between the 85th percentile and
    the median exposure is being reduced
  • Outriders are being becoming less of a problem

18
Trend - AP Lumbar Spine
19
Trend - AP Cervical Spine
20
Trend - PA Chest (without a grid)
21
Trend - PA Chest (with a grid)
22
Trend - DP Foot
23
Trend - Hand
24
Trend Dental Cephalometric
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

26
For more information
Radiation Safety Section
www.michigan.gov/rss
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