ASMR 2017

Adaptive Planning Based on CBCT 2

• Recalculation of planned dose using CBCT

• Are HU on CBCTs accurate? 

Some conflicting evidence in the literature



Depends on the quality of your CBCT

• Options to overcome these uncertainties:  Pixel correction technique

 CT numbers from conventional CT are applied to CBCT  Deformable registration  Deform planning CT to the CBCT to calculate “dose of the day”  This is a move towards “online” ART