Table 1.

Arc geometry set by Yuan et al. (40) for SRS-VMAT (single-isocenter) plans on treatment of multiple brain metastases.

Arc	Plan	Gantry start angle (°)	Gantry stop angle (°)	Gantry rotation direction	Table angle (°)
1	2-arc, 4-arc	181	179	Clockwise	0
2	2-arc, 4-arc	181	10	Clockwise	90
3	4-arc	10	181	Counterclockwise	45
4	4-arc	179	350	Counterclockwise	315