208-209 / 1778
ITV-T LR and PTV-T LR
Standard:
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10-15mm ITV margin
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5mm PTV margin
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Total 15-20mm margin
Individualised approach:
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Several treatment planning images: MRI, CT,
full bladder, empty bladder
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Review anatomy on treatment planning
images
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Apply margin according to predicted motion
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Monitor on daily CBCT
Maximum rectal filling at treatment
planning scan: 40mm
CTV to PTV:
15-20mm
CTV-HR region
most critical