Potentials and Limitations of Guiding Liver Stereotactic Body Radiation Therapy Set-Up on Liver-Implanted Fiducial Markers

If markers can be implanted near and around the tumor, residual set-up errors by marker guidance are small compared to those of conventional set-up methods, allowing high-precision tumor radiation set-up. However, substantial errors may result if markers are not implanted precisely, requiring further research to obtain adequate safety margins.