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Source Tracking
Johansen J.G. et al. Brachy. 17 122-132 (2018)
• 1 IV dosimeter and at least 3 dwell positions
➢
Or 3 dosimeters and 1 dwell positions
✓
+1 on a separate line removes solution degeneracies
• Knowledge of source channel: catheter(s) / applicator
• Knowledge of expected dose at the dosimeter position from
each dwell position
➢
High SNR/SBR dosimeter
➢
Energy/temperature/angle independent or corrected
• Express any deviation in measured dose as a positional
deviation along the channel axis (
z) and radial distance
from it (
r)