Physics Bucharest 2017
Off-line observational studies
Margins applied to bladder (CTV)
Number of patients in whom bladder excursions were encompassed by target volume used
Study (year)
Imaging technique
n
Ant Post Sup Inf
Lat
Sur et al., (1993)
Planning CT, repeated halfway through treatment Planning CT, repeated weekly through treatment Planning CT, repeated halfway through and end of treatment Planning CT, repeated weekly through treatment
90
1.0-2.0 isotropic
80%
67% (33% had at least one incidence of wall movement >15 mm)
Turner et al., (1997)
30
1.5-2.0 isotropic
Harris et al., (1998)
20
1.0-2.0 isotropic
80%
35% (71%, GTV received at least 95% of dose on weekly scans)
Pos et al., (2003)
17
1.5-2.0 isotropic
1.1 (L) 0.8 (R)
Muren et al., (2003)
84%
Planning CT, weekly CT (and EPI)
20
2.0 1.4 2.0 1.0
24
3 PTVs created
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