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Irradiation of normal tissue
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Difference in irradiated body volume of 1000cm3 in Inst-3!
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Question of PTV margin
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5mm margin expands irradiated volume by 500cm3
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10mm margin expands irradiated volume by 1000cm3
PTV
margin
5mm
PTV
margin
10mm?
0
500
1000
1500
2000
2500
1 2 3 4 5 6 7 8 9 10 11 12
0
200
400
600
800
1000
1200
1400
1600
1800
2000
1 2 3 4 5 6 7 8 9 10 11 12
Body V43
Bowel V15