ESTRO course on Image Guided Radiotherapy in Clinical Practice 2018

QA of treatment delivery for free-breathing treatment: fluoro /markers

• Extracted fiducial motion from 3D CBCT

• Lateral + AP fluoroscopy (15 sec) • Good agreement • Cases of large deviation between 4D CT and fluoro/CBCT

• If time > 7.5 min,

intrafraction imaging recommended

Rankin IJROBP 2016