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Table 2 Results of photon boost cavity displacements using both the simulation and first treatment fraction scans as the RV

From: Image guidance using 3D-ultrasound (3D-US) for daily positioning of lumpectomy cavity for boost irradiation

  Simulation US Reference 1st Treatment Fraction US reference
Radial Displacement (cm) # fractions Percentage of fractions # fractions Percentage of fractions
> 1.5 16 22% 3 5%
> 1.0 36 50% 15 24%
> 0.5 65 90% 46 73%