Table 1.

Dosimeter positions, with respect to the geometric centre of the phantom, for three IMRT MOSFET configurations: prostate, nasopharynx and base of tongue.

Site	ROI	Lat. (X) cm	AP/PA (Y) cm	Sup/Inf (Z) cm
Prostate	PTV‐1	0.05	$-24.8$	$-1.6$
	Bladder‐1	$-1.45$	$-19.8$	$-1.6$
	Bladder‐2	1.55	$-19.8$	$-1.6$
	Rectum‐1	$-1.45$	$-30.1$	$-1.6$
	Rectum‐2	1.55	$-30.1$	$-1.6$
Nasopharynx	PTV‐1	0.05	$-22.8$	0
	PTV‐2	$-2.45$	$-23.1$	0
	Spinal cord‐1	0.05	$-27.8$	0
	Spinal cord‐1	$-0.45$	$-29.1$	0
	Spinal cord‐1	0.55	$-30.1$	0
Base of tongue	PTV‐1	0.05	$-21.8$	$-2$
	PTV‐2	2.55	$-24.8$	$-2$
	Spinal cord‐1	0.05	$-26.8$	$-2$
	Spinal cord‐1	$-0.45$	$-28.8$	1
	Spinal cord‐1	$-0.45$	$-27.8$	1