Frameless linac-based stereotactic radiosurgery (SRS) for brain metastases: analysis of patient repositioning using a mask fixation system and clinical outcomes

Table 2 Accuracy of isocenter relocation at CT verification

Direction (mm)	Mean	SD	Range
Cranio-caudal	0.4	0.6	-1,2 - 2.1
Medio-lateral	0.12	0.35	-0.9 - 1.4
Anterior-posterior	0.2	0.4	-1,6 - 1.3
3D-displacement	0.5	0.7	0.1-2.9

ISSN: 1748-717X