Imaging for early stage breast cancer

3D intrafractional target motion in APBI

- 23 free-breathing patients - 4 clips - orthogonal kV X-ray imaging - respiratory motion and baseline drift determination

- respiratory-induced motions ranged from 0.6 to 1.5 mm in all directions - systematic baseline drift of 1.5 mm towards the posterior direction

Hirata et al. Radiother Oncol 124:118–123. 2017