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Park et al. IJROBP 82:e425-e431. 2012
Validating fiducial markers for IGRT for APBI
- in 26 patients 3-4 gold fiducial markers placed at the periphery of lumpectomy cavity
- free breathing 4D CTs were acquired pre- and posttreatment
- intrafraction motion, variations in respiratory motion and fiducial migration were calculated
end-inspiration
end-expiration
end-inspiration
end-expiration
fiducial markers are stable
throughout the course of APBI, no evidence of migration
planning target volume
margins
when using bony landmarks should be
10 mm
and can be
reduced to 6 mm if using fiducials