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Table 4 Correlation of prescriptions (non-breast IMRT subgroups - topological aspects)

From: Remarks on reporting and recording consistent with the ICRU Reference Dose

  denominator\numerator PTV
DMean
PTV5
DMean
PTV
D95
ICRU
RD
(Case-Mean)
ICRU
RD
   [%] [%] [%] [%] [%]
Single PTV
n = 12
PTV DMedian 99.5
0.3
100.7
0.4
94.1
1.9
100.6
1.3
100.6
2.4
  PTV DMean   101.2
0.6
94.6
1.8
101.1
1.4
101.1
2.5
  PTV5 DMean    93.4
2.1
99.9
1.3
99.9
2.4
  PTV D95     107.0
2.8
107.0
3.5
Central PTV
n = 15
PTV DMedian 100.0
0.3
101.0
0.8
96.5
0.7
100.4
0.8
100.4
1.6
  PTV DMean   100.9
0.8
96.5
0.8
100.4
0.9
100.4
1.6
  PTV5 DMean    95.6
1.3
99.4
0.8
99.4
1.6
  PTV D95     104.0
1.4
104.0
2.0
Circumferential PTV
n = 20
PTV DMedian 99.9
1.3
100.0
1.2
93.6
2.4
100.0
2.2
100.0
3.4
  PTV DMean   99.8
2.0
93.4
2.7
99.8
2.9
99.8
3.9
  PTV5 DMean    93.8
2.4
99.7
1.6
99.7
2.9
  PTV D95     106.9
4.2
106.9
5.0
  1. Correlation of several prescription and reporting methods for subgroups of IMRT plans (non-breast cases) without surface effects (with bolus and PTV-distance to patient outline > 5 mm). All methods report for the same dose distribution per study. The upper value in each cell is the mean value; the lower value is the corresponding standard deviation. ICRU RD: ICRU Reference Dose; PTV5: PTV shrunk by 5 mm; Case mean: Mean value of four (IMRT with a single PTV: five) points suitable for dose description according to ICRU 50/62. Central and circumferential volumes together form the volumes of SIB (2 or 3 nested volumes)