Keywords:
Pelvis, CT, Localisation, Image guided radiotherapy
Authors:
C. Wilson, M. Chao, F. Foroudi, D. Lim Joon, D. Bolton, A. Tan, N. Lawrentshuck, H. Ho, S. Spencer; VIC/AU
DOI:
10.1594/ranzcr2018/R-0094
Results
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From September 2015 to July 2017,
four patients with muscle invasive bladder carcinoma were included in the study.
No complications were reported following injection with TraceIT.
The volume of Trace IT gel did not significantly diminish over the course of partial bladder radiotherapy with a mean volume on day 1 of 0.38mL,
compared to a mean volume of 0.31mL on day 7 (p=0.14).
The visibility of the fiducial also remained stable over the treatment course with a mean Hounsfield Unit of 1069.75 on Day 1,
compared to a mean of 1029.75 on day 7 (p=0.015).
No issues were reported in matching of TraceIT on conebeam CT images.
In comparing the verification shift based on the fiducials relative to bone,
we recorded a mean fiducial shift of 9.98mm left-right,
7.24 superior-inferior and 13.32 anterior-posterior.