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. Author manuscript; available in PMC: 2010 Jul 1.
Published in final edited form as: Radiother Oncol. 2009 Mar 30;92(1):48–56. doi: 10.1016/j.radonc.2009.03.004

Table 2. Single field measurements and RTPS calculations of anterior and posterior rectal wall doses with and without rectal balloon cavity. All errors are the 95% confidence interval of the mean.

Beam anterior cavity wall posterior cavity wall
Measured (Gy) Planned (Gy) Difference (Gy) Measured (Gy) Planned (Gy) Difference (Gy)
LAT – No Cavity 0.530 ± 0.010 0.537 -0.007 0.024 ± 0.011 0.038 -0.014
LAT – Cavity 0.468 ± 0.053 0.514 -0.046 0.053 ± 0.003 0.046 0.007
AP – No Cavity 0.790 ± 0.060 0.786 0.004 0.570 ± 0.020 0.582 -0.012
AP - Cavity 0.776 ± 0.049 0.784 -0.008 0.625 ± 0.011 0.643 -0.018
AP – Cavity (no film in cavity) 0.785 ± 0.006 0.784 0.001 0.659 ± 0.004 0.643 0.016