Skip to main content
. Author manuscript; available in PMC: 2013 Oct 1.
Published in final edited form as: Radiat Meas. 2012 Aug 24;47(10):921–929. doi: 10.1016/j.radmeas.2012.08.005

Figure 2.

Figure 2

Partially inflated endorectal balloon with a single PSD attached. Three fiducial markers were placed on the balloon to aid in the proper positioning of the PSD during inflation after insertion and to provide landmarks by which the position of the water-equivalent scintillating fiber could be verified in CT images. A 1-cm length of fiber-optic cable was placed between the tip of the PSD and the superior-most fiducial marker to prevent dose perturbation effects on PSD measurement due to the fiducial marker. Additionally, small strips of bolus material were placed adjacent to the PSD tip in an effort to reduce the effects of air pockets near the detector volume.