In:
Journal of Radiotherapy, Hindawi Limited, Vol. 2014 ( 2014-06-04), p. 1-7
Abstract:
Aim . The aim of the study was to examine the dosimetric effect of rectal retraction, using a rectal retractor, by performing a comparative treatment planning study. Material and Methods . Treatment plans using volumetric arc therapy (VMAT) were produced for ten patients both with and without rectal retraction. A hypofractionation scheme of 42.7 Gy in seven fractions was used. The dose to the rectal wall was evaluated for both methods (with and without retraction) using four dose-volume criteria: V 40.1 Gy , V 38.3 Gy , V 36.5 Gy , and V 32.6 Gy . Results . The retraction of the rectal wall increased the distance between the rectal wall and the prostate. The rectal wall volume was reduced to zero for all dose-volume values except for V 32.6 Gy , which was 0.2 cm 3 in average when the rectal retractor was used. Conclusion . There was a significant decrease of V 40.1 Gy , V 38.3 Gy , V 36.5 Gy , and V 32.6 Gy when the rectal retractor was used without compromising the dose coverage of planning target volume (PTV).
Type of Medium:
Online Resource
ISSN:
2356-7600
,
2314-8349
Language:
English
Publisher:
Hindawi Limited
Publication Date:
2014
detail.hit.zdb_id:
2773538-2
Permalink