Table 2.

Summary of dosimetric comparison expressed in mean values ± standard deviation. Significance is indicated by $p<0.05$. Only ${\mathrm{D}}_{2\text{cm}}$ and Rib ${\mathrm{D}}_{\text{max}}$ were significant for RA vs. FF IMRT

	IMRT	RA	HT	P‐value RA vs. HT	P‐value FF IMRT vs. HT
Target (PTV)
${\text{CI}}_{100\%}$	$1.36\pm 2.9$	$1.29\pm 2.2$	$1.06\pm 0.03$	$<0.05$	$<0.05$
${\mathrm{R}}_{50\%}$	$7.1\pm 1.9$	$6.53\pm 1.2$	$5.3\pm 0.9$	$<0.01$	$<0.01$
${\mathrm{D}}_{2\text{cm}}(\%)$	$75.65\pm 12.7$	$67.34\pm 10.5$	$51.89\pm 16.3$	$<0.01$	$<0.01$
HI	$1.15\pm 0.02$	$1.14\pm 0.02$	$1.07\pm 0.02$	$<0.01$	$<0.01$
Maximum Dose (%)	$118.26\pm 2.3$	$117.51\pm 1.0$	$110.26\pm 2.9$	$<0.01$	$<0.01$
OAR (Gy)
Spinal Cord	$13.9\pm 9.7$	$14.25\pm 7.7$	$13.08\pm 5.6$	0.22	0.22
Esophagus	$11.62\pm 5.7$	$14.12\pm 6.5$	$13.71\pm 6.3$	0.54	0.51
Heart	$10.93\pm 12.2$	$9.72\pm 11.9$	$8.59\pm 10.3$	0.12	0.06
Trachea	$11.32\pm 8.3$	$11.86\pm 8.3$	$11.66\pm 6.9$	0.81	0.77
Rib ${\mathrm{D}}_{\text{max}}$	$49.53\pm 10.5$	$47.04\pm 12.9$	$42.54\pm 12.1$	$<0.01$	$<0.01$
Lung ${\mathrm{V}}_{20}(\%)$	$6.6\pm 3.7$	$6.32\pm 3.9$	$5.81\pm 3.4$	0.11	0.12