Optimal fractionation and timing of weekly cone-beam CT in daily surface-guided radiotherapy for breast cancer

Radiation Oncology

Table 2 The preferred options based on the different dimension and the corresponding margins

Frequency	Recommended mode	Margin(mm)			Dose
Frequency	Recommended mode	LR	SI	AP	Deviation	Parameter impact	Agreement(≤10% and > 10%)	Agreement(<5%, 5-10%, and > 10%)
3	CBCT₁₂₃	5.29	6.89	5.38	*		**	**
	CBCT₁₂₄	4.90	5.54	5.72	*	*	*******	*******
	CBCT₁₂₅	4.79	5.94	6.09	*		********	********
4	CBCT₁₂₃₄	4.60	5.61	5.28	*	*	*******	*******
	CBCT₁₂₃₅	4.80	5.94	5.14	*		**, ***	**, ***
	CBCT₁₂₄₅	4.55	4.97	5.34	*	*	**, ***	*****
	CBCT₁₃₄₅	4.77	5.89	4.89	*	*	*****	*****
5	CBCT₁₂₃₄₅	4.44	5.07	4.94	*	*	*****	*****

Note: Single asterisks in the table represent modes that can be considered initially; multiple asterisks represent modes with an excellent agreement about PTV deviation percentage.

ISSN: 1748-717X