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Imaging for target definition

Slow 3D-CT

Ø

Images acquired in breathhold are

NOT

representative for treatment!

Ø

Images acquired in free breathing are associated with multiple

uncertainties:

§

Size and shape of the target?

§

Target position / organs at risk?

§

Motion range and trajectory of target and organs at risk?

Garcia

et al.

, 2006

4D-CT image artifact reduction

SBRT 2017 - D. Verellen