2016 Risk Course Book

Taxonomies and Severity Scales

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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