Table 3.

Summary of trajectory log file mechanical delivery errors as a function of treatment site for prostate (Pros), prostate and pelvic node (PPN), and head and neck (H&N). Data are presented as mean $\pm 1\text{SD}$.

	Pros	PPN	H&N
Average Leaf Errors (mm)	$-0.001\pm 0.002$	$0.001\pm 0.002$	$0.001\pm 0.003$
Std Dev. Leaf Errors (mm)	$0.134\pm 0.009$	$0.162\pm 0.009$	$0.138\pm 0.012$
RMS Leaf Errors (mm)	$0.128\pm 0.008$	$0.157\pm 0.009$	$0.135\pm 0.013$
Gantry Angle Errors (deg)	$0.025\pm 0.006$	$0.024\pm 0.005$	$0.026\pm 0.012$
Std Dev. Gantry Angle Errors (deg)	$0.051\pm 0.003$	$0.049\pm 0.001$	$0.059\pm 0.016$