ESTRO course on Image Guided Radiotherapy in Clinical Practice 2018

2D or 3D setup?

2D vs 3D setup

 Some users use more frequently 2D planar setup correction as opposed to using CBCT  Why? – Speed and ease of use of the software? – Tradition?  Does it make a quantative difference?

Same patients, different shifts

2D vs 3D setup correction

CBCT Planar automatic Planar manual

 Li et al 2008

C/Planar imaging

– 21 pts, 98 images – 3 methods of registration:  CBCT, automated match

underestimates the setup error

 (LR and AP) Planar, automated match  (LR and AP) Planar, manual match

Li et al 2008

65pts 10 fractions registration on CBCT en 2D planar imaging

2D vs 3D setup

 10 pts, 65 images  Comparing: – CBCT – 2D Planar

– (Digital Tomosynthesis)

2007

Wu et al 2007

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