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SBRT%Affects%the%Whole%Treatment%Chain%
•
CT#imaging#
"
Slice%spacing%(for%DRR%genera;on),%contrast,%Field%of%View%(nonBcoplanar,%…)%
"
4DBCT:%respira;on%signal,%phaseBbased/amplitudeBbased,%…%
"
Immobiliza;on%techniques%
•
Secondary#image#sets#
"
Inves;gate%and%discuss%MRI%Sequences%to%be%used%
"
Assess%registra;on%methods%and%registra;on%accuracy%
•
Margins#
"
Calculate%/%es;mate%required%margins%and%discuss%these%with%the%team%(radia;on%
oncologist,%Physicist,%RTT).%Discuss%the%incen;ve%of%the%treatment.%
"
Use%your%own%data!!%
"
For%differen;al%mo;on%between%tumor%and%organ%at%risk%consider%margins%around%
organs%at%risk%
•
Treatment#planning#
"
Dose%prescrip;on,%normaliza;on,%repor;ng%(prescrip;on%isoBdose%50%%B%80%;%
normaliza;on)%
"
Constraints%for%organs%at%risk%for%hypofrac;onated%schedules%
"
Plan%acceptance:%eg%hotspots%far%away%from%target,%%skin%dose%
SBRT 2015 - D. Verellen
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