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Summary: measurements in small static fields
• Consensus so far on current good practice for reference and relative dosimetry in static
small MV photon fields:
✓
Careful experimental setup
✓
Choice of suitably small detector which is known to minimally perturb fluence
✓
Approximately correct for volume averaging and energy dependence of detector
✓
Corroboration of data
•
Current research efforts in small field dosimetry focus on the
determination of
detector specific output correction factors.
•
Detectors requiring output
corrections greater that 5%
will not be recommended for
dose determination in small fields.
•
The
IAEA TECDOC
will include a consistent set of such data and will be an
international code of practice for small static field dosimetry.