2.

PET-CT定位PTV缩小者正常组织DVH参数比较

DVH parameters of normal tissue for decreased PTV based on PET-CT

DVH index	CT plan	PET-CT plan	Z	P
Lung V10 (%)	58.52±12.20	51.24±17.16	3.724	< 0.001
Lung V20 (%)	37.86±7.38	28.05±6.54	3.724	< 0.001
Lung V40 (%)	12.10±2.51	8.88±2.12	3.724	< 0.001
Lung MLD (cGy)	18.39±1.74	15.45±2.77	3.680	< 0.001
Esop MED (cGy)	19.91±3.72	16.69±3.39	3.506	< 0.001
Spinal Ds (cGy)	31.47±6.99	25.78±5.62	3.724	< 0.001
Hear MHD (cGy)	15.04±4.66	11.49±4.54	3.724	< 0.001