ESTRO PT 2018

Motion mitigation – tracking and re-tracking

Re-scanning and re-tracking compared

4D – no mitigation 4D – 6x re-scanning

6x

No tracking

Static plan

static

4D – tracking

4D – 3x re-tracking

3D

3x 3D

2mm error

Zhang et al 2014, PMB, 59:7793-7817