Table 1.

Doses measured with the PSD and planned doses for different PSD positions in the urethra and the rectum. Measured to planned ratio was also calculated. Measured values are reported as the average and standard deviation from three repeated measurements.

PSD position	Measured dose (cGy)	Planned dose (cGy)	Measured∕planned
Urethra—pos. 1	1363 ± 2	1368 ± 42	0.996 ± 0.032
Urethra—pos. 4	1851 ± 2	1845 ± 4	1.003 ± 0.003
Urethra—pos. 8	1904 ± 2	1895 ± 2	1.005 ± 0.002
Urethra—pos. 9	1883 ± 2	1875 ± 6	1.004 ± 0.004
Urethra—pos. 10	1750 ± 2	1742 ± 23	1.005 ± 0.015
Rectum—pos. 7	745 ± 2	714 ± 1	1.043 ± 0.003