ASMR 2017

Design of the observer study

- Select the tightest fitting plan -  20 observers

- 15 RTT’s, 1 PhD student, 4 Physicists

 11 patients

- 5 prone with BB, 6 supine

 5 CBCT scans per patient  Delineations according to Roels et al, 2006, IJROPB 3 margins for ventral side upper mesorectum depending on anatomy captured on CTref:

Rectum

Full

Medium

Empty

Margins -25 mm, -15 mm, 0 mm -15 mm, 0 mm, 15 mm 0 mm, 15 mm, 25 mm