Table 1.

Planning objectives for the example paraspinal SBRT case. The prescription for this case was 36 Gy in 12 Gy fractions to the PTV.

Priority	Structure	Goal
1	Cord	Max dose < 24 Gy
2	PTV	Min dose > 36 Gy
	GTV	Min dose > 40 Gy
3	Esophagus	Max dose < 27 Gy
	Aorta	Max dose < 30 Gy
	Lung	V20 < 10%
	All other normal tissue	ALARA