Gold-marker-based image-guided radiation therapy (IGRT) of the prostate allows to correct for inter- and intrafraction motion and therefore to safely reduce margins for the prostate planning target volume (PTV). However, pelvic PTVs, when coadministered in a single plan (registered to gold markers [GM]), require reassessment of the margin concept since prostate movement is independent from the pelvic bony anatomy to which the lymphatics are usually referenced to.
Useful keywords (using NLM MeSH Indexing)
Margins of Excision*
Radiotherapy Planning, Computer-Assisted
Radiotherapy Setup Errors/prevention*
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