Skip to main content
. Author manuscript; available in PMC: 2018 Dec 1.
Published in final edited form as: Int J Radiat Oncol Biol Phys. 2017 Aug 14;99(5):1111–1120. doi: 10.1016/j.ijrobp.2017.08.006

Fig. 4.

Fig. 4

Comparison of stereotactic body radiation therapy plans before and after hydrogel spacer placement. Computed tomography scans of EUS Specimen 1 and 2 are shown before (A and C) and after (B and D) hydrogel spacer placement. The planning target volume (red shadowed) was generated by a 2-mm uniform expansion of the spherical mock tumor placed at the boundary of the head of the pancreas-duodenum interface in the pre-injection trials and abutting the boundary of the spacer in the head of the pancreas in the post-injection trials. The duodenum (blue shadowed) and isodose lines for 33 Gy (red), 20 Gy (yellow), and 15 Gy (blue) are depicted for each plan.