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Dokumentenname Datum Seite 33

Van de Water IJROBP 2014

3mm SM

4 Fx

% Px with 98%

coverage

w/o tracking

61 %

15 sec imaging

interval

91%

60 sec imaging

interval

96%

• Longer treatment

fractions with ↑ motion

• Less „smearing“ effect

• Smaller margins

Stereotactic Body Radiation Therapy:

Dosimetric impact of prostate motion

Increased relevance of prostate motion in SBRT

Increased imaging frequency does not necessarily improve

accuracy