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DVH parameter
±
2.5 mm
±
5.0 mm
CTV D90
±
2%
-4% , +3%
CTV D100
-3% , +2%
-7% , +3%
GTV D90
±
2%
-5% , +4%
GTV D100
±
4%
-8% , +6%
Bladder D
2cc
±
3%
-5% , +7%
Rectum D
2cc
±
5%
-8% , +11%
Sigmoid D
2cc
-3% , +2%
±
4%
Humer I et al 2009
Impact of reconstruction uncertainties on DVH
parameters in 3D based BT when rotating/rolling
the Applicator by 1 or 2 dwell positions