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37
Planning aim and prescription dose
Planning aim: what you want to obtain, e.g. 4x7 Gy
Prescribed dose: what you decide to treat
Structure
Dose-volume
parameter
Planning aim, Gy Prescribed dose
Gy
CTV
HR
EQD2
10
D
90
≥ 85
88.9
Bladder
EQD2
3
D
2cm
3
≤ 90
71.1
Rectum EQD2
3
D
2cm
3
≤ 70
65.6
Sigmoid
EQD2
3
D
2cm
3
≤ 70
57.4
Bowel
EQD2
3
D
2cm
3
≤ 70
53.3
Case 6, IIIB, IC/IS BT
Appendix, ICRU 89
,
PP201-207