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Residual setup error after 2D kV/MV orthogonal imaging for APBI
10 patients treated with 3D-CRT in 10 fractions, setup based on
skin/cradle marks
orthogonal kV/MV images
registered to DRRs using
bony landmarks
subsequent CBCT
and registration to planning CT using
soft tissue information
residual errors were determined
Fatunase et al. IJROBP 70:1025-34. 2008