Remarks on reporting and recording consistent with the ICRU Reference Dose

Radiation Oncology

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

	denominator\numerator	PTV D_Mean	PTV₅ D_Mean	PTV D₉₅	ICRU RD (Case-Mean)	ICRU RD
		[%]	[%]	[%]	[%]	[%]
Single PTV n = 12	PTV D_Median	99.5 0.3	100.7 0.4	94.1 1.9	100.6 1.3	100.6 2.4
	PTV D_Mean		101.2 0.6	94.6 1.8	101.1 1.4	101.1 2.5
	PTV₅ D_Mean			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 D_Median	100.0 0.3	101.0 0.8	96.5 0.7	100.4 0.8	100.4 1.6
	PTV D_Mean		100.9 0.8	96.5 0.8	100.4 0.9	100.4 1.6
	PTV₅ D_Mean			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 D_Median	99.9 1.3	100.0 1.2	93.6 2.4	100.0 2.2	100.0 3.4
	PTV D_Mean		99.8 2.0	93.4 2.7	99.8 2.9	99.8 3.9
	PTV₅ D_Mean			93.8 2.4	99.7 1.6	99.7 2.9
	PTV D₉₅				106.9 4.2	106.9 5.0

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)

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