Impact of beam configuration on VMAT plan quality for Pinnacle3Auto-Planning for head and neck cases

Radiation Oncology

Table 3 Example of evaluation parameter set for case #1

Structure	DVH Parameter		Dose Limit in relation to D₉₅	Absolute Dose Limit in Gy
PTV1	D₉₅		± 2%	69,30
	D₉₈	>	0,95 D₉₅	65,8
	D_min	>	0,9 D₉₅	62,4
	STD	<	3,3%	2,3
PTV2	D₉₅		± 2%	66,00
	D₉₈	>	0,95 D₉₅	62,7
	D_min	>	0,9 D₉₅	59,4
	STD	<	3,3%	2,2
PTV3	D₉₅	>	± 2%	59,40
	D₉₈	>	0,95 D₉₅	56,4
	D_min	<	0,9 D₉₅	53,5
	STD	<	3,3%	2,0
SpinalCanal	D _1cm³	<		45
BrainStem	D _1cm³	<		45
Left Parotid	D₆₆	<		20
Left Parotid	D_mean	<		26
Right Parotid	D₆₆	<		20
Right Parotid	D_mean	<		26
Larynx	D₀₅	<		69
Larynx	D₀₅	<		45
Mandible	D₀₅	<		69
	D₁₀	<		60
	D₅₀	<		52
Neck	D_max	<		40
Left Lens	D₀₅	<		9
Right Lens	D₀₅	<		9
Left OpticNerve	D₀₅	<		50
Right OpticNerve	D₀₅	<		50
Chiasm	D₀₅	<		50
Pituitary	D₀₅	<		50
Left InnerEar	D₀₅	<		30
Right InnerEar	D₀₅	<		30
Outline	D_Max	<	1,15 D₉₅	79,7

Definition of an evaluation parameter set for an integrated boost technique with three dose levels (PTV1, PTV2, PTV3). Requirements for target coverage and dose homogeneity are described by DVH parameters, relative and absolute dose limits scaled according to the prescription dose D₉₅ of each PTV (top part). DVH parameters and absolute dose limits are listed for organs at risk (bottom part)
D_Min Minimum Dose, D_Max Maximum Dose, D_Mean Mean Dose, STD Standard deviation, D_X Volume X is covered by the dose value, PTV Planning target volume

ISSN: 1748-717X