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Taxonomies and Severity Scales
Incident Learning Systems» SAFRON and AAPM »
Taxonomy Review
Exercise 3: Severity
Medical and dosimetric scores do not directly
address the issue of geometric misses? How would
you report a geometric miss?
Yes
No
Ignore geometric misses – they are too difficult to quantify
✔
Record the largest dose deviation in the PTV or Organ at Risk
✔
Only record if an OAR dose limit were exceeded
✔
Error in mm in the position of the field central ray with respect to patient anatomy
✔
Error in mm of any field edge
✔
Use a metric which combines dose and volume information such as EUD
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