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• DETAILED KNOWLEDGE about primary surgical procedure and details of the
pathology report, as well as about preoperative imaging.
• Identification of the TUMOUR LOCALIZATION before breast conserving surgery
inside the breast and translation of this information into current CT imaging data set.
• Calculation of the size of the TOTAL SAFETY MARGINS needed to cover the CTV in
all 6 directions that should be at least 2 cm from the tumour.
• DEFINITION OF TARGET – CTV/PTV.
• DELINEATION OF THE TARGET– CTV/PTV.
Information and procedures for
appropriate delineation of (boost) CTV: