Table 2.

Evaluation interval of metric parameters along with their value range

Structure	Metric				PQM value range
	Parameter	Lower limit	Interval	Upper limit	Minimum	Maximum
PTV	CI	1	1–2	2	0	10
	HI	0	0–0.2	0.2	0	10
Lungs	V5 (%)	27	27–65	65	0	10
Lungs	V20 (%)	14	14–28	28	0	10
Lungs	V30 (%)	12	12–20	20	0	10
Lungs	Dmean (Gy)	9	9–17	17	0	10
Heart	V30 (%)	3	3–40	40	0	10
Heart	V40 (%)	2	2–30	30	0	10
Spinal cord	Dmax (Gy)	31	31–40	40	0	10
Spinal cord PRV	Dmax (Gy)	35	35–45	45	0	10