Table 2.

Comparisons of integral dose.

Mean Integral Dose to Organ a	Axial Beam	Non‐axial Beam	No. of Pts with Lower Dose in Non‐axial Fields	p‐value
GTV	14,698	14,691	13/24	0.9
Heart	19,077	10,725	20/24	0.0001
Lungs	88,598	91,027	11/24	0.5
Esophagus	1,161	1,188	7/24	0.6
Spinal cord	46.5	53.4	4/24	0.003
Liver	3,1021	10,525	4/4	0.1
Skin	11,052	10,895	10/24	0.6

^aUnits for mean integral dose are “$\%\text{dose}\hspace{0.17em}\mathrm{x}\hspace{0.17em}\text{cc}$”.