Remarks on reporting and recording consistent with the ICRU Reference Dose

Radiation Oncology

Table 3 Correlation of prescriptions (breast cases -- surface effects)

		denominator\numerator	PTV D_Mean	PTV₅ D_Mean	PTV D₉₅	PTV₅ D₉₅	ICRU RD (Case Mean)	ICRU RD
			[%]	[%]	[%]	[%]	[%]	[%]
with bolus	CRT n = 14	PTV D_Median	99.9 0.3	100.0 0.4	94.1 1.5	95.5 1.4	98.5 1.5	98.5 1.9
		PTV D_Mean		100.1 0.3	94.1 1.3	95.6 1.3	98.6 1.4	98.6 1.8
		PTV₅ D_Mean			94.1 1.3	95.5 1.1	98.5 1.3	98.5 1.8
		PTV D₉₅				101.6 1.2	104.7 1.8	104.8 2.2
		PTV₅ D₉₅					103.1 1.6	103.2 2.0
		ICRU RD (Case Mean)						100.0 1.3
	IMRT n = 10	PTV D_Median	99.5 0.3	100.9 0.3	92.1 2.2	96.4 1.0	100.7 1.1	100.7 2.8
		PTV D_Mean		101.4 0.5	92.5 2.0	96.9 1.1	101.2 1.0	101.2 2.2
		PTV₅ D_Mean			91.3 2.3	95.6 1.1	99.9 1.0	99.9 2.7
		PTV D₉₅				104.7 2.2	109.5 2.6	109.5 3.6
		PTV₅ D₉₅					104.5 1.7	104.5 3.1
		ICRU RD (Case Mean)						100.0 2.5
without bolus	CRT n = 14	PTV D_Median	98.8 0.3	100.6 0.4	88.0 1.5	96.4 1.4	99.3 1.5	99.3 1.9
		PTV D_Mean		101.8 0.3	89.0 1.3	97.5 1.3	100.5 1.4	100.4 1.8
		PTV₅ D_Mean			87.5 1.3	95.8 1.1	98.7 1.3	98.7 1.8
		PTV D₉₅				109.7 1.2	113.0 1.8	112.7 2.2
		PTV₅ D₉₅					103.0 1.6	103.1 2.0
		ICRU RD (Case Mean)						100.0 1.3
	IMRT n = 10	PTV D_Median	97.7 0.7	101.4 1.0	81.5 3.2	96.3 1.4	102.1 1.0	102.1 2.6
		PTV D_Mean		103.8 1.4	83.5 2.9	98.6 1.9	104.6 1.5	104.6 2.9
		PTV₅ D_Mean			80.4 3.8	95.0 1.0	100.7 0.8	100.7 2.5
		PTV D₉₅				118.3 6.4	125.5 6.1	125.5 6.6
		PTV₅ D₉₅					106.1 1.5	106.1 3.0
		ICRU RD (Case Mean)						100.0 2.4

Correlation of several prescription and reporting methods. All methods report for the same dose distribution per study. -- Breast cases with and without bolus (upper and lower part, respectively). 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

ISSN: 1748-717X