ASMR 2016

Plan selection - rectum

How do we cope with this variation ?

Single CT scan Assess rectum filling CT scan: empty, medium, full Make three plans with different CTV-PTV margins at ventral side of upper mesorectum: Empty Margins -25 mm, -15 mm, 0 mm -15 mm, 0 mm, 15 mm 0 mm, 15 mm, 25 mm Rectum Full Medium