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Table 4 Margins needed to be applied for patients with low risk prostate cancer when matching on fiducial markers (FM), soft tissue (ST), bones (B) or balloon (ERB)

From: PTV margin definition in hypofractionated IGRT of localized prostate cancer using cone beam CT and orthogonal image pairs with fiducial markers

  M (mm) CBCT ST (mm) CBCT B (mm) CBCT Ba (mm) CBCT M (mm) kV B (mm) kV Ba (mm) kV
Anterior 7.18 7.69 9.45 9.07 7.67 8.64 8.64
Posterior 5.47 6.09 8.20 7.75 6.10 7.27 7.27
Long 7.09 7.16 9.00 8.32 7.79 12.48 12.48
Lat 5.47 5.88 5.95 6.10 5.65 7.58 7.58