4DCT and CBCT based PTV margin in Stereotactic Body Radiotherapy(SBRT) of non-small cell lung tumor adhered to chest wall or diaphragm

Table 4 CTV margin changes of NSCLC patients

Author	Recipe	Margin through set-up errors			Margin through all variation
Author	Recipe	ML	AP	SI	ML	AP	SI
Stroom et al. (1999a) [26]	2∑ + 0.7σ	0.55	0.57	0.99	0.72	0.79	2.18
van Herk et al. (2000) [27]	2.5∑ + 0.7σ	0.67	0.69	1.21	0.88	0.98	2.68
Parker et al. (2002) [28]	\( \sum +\sqrt{\left({\sigma}^2+{\sum}^2\right)} \)	0.50	0.52	0.90	0.66	0.75	2.06
Snoke JJ (2007)	2.5∑ + β(σ ² + σ ²_P )^1/2 − βσ _P	0.60	0.64	1.09	0.82	0.93	2.57

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