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Why difficult to compare interstitial BT to other techniques?
Differences in methods for performing implantations, free hand or template
guided
Differences in target definition, both defining target by delineation and implant
volume, e.g. 1 cm or 2 cm expansion
Differences in treatment planning process, e.g. use conventional orthogonal
film dosimetry or CT planning with geometric optimization tools
Dose to OAR is directly dependent on the localization of the lumpectomy cavity
and the size of the breast