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Motion compensation techniques
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Margins versus edge enhancement to compensate for
motion blurring in IMRT?
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Using margins:
Ø
Tumor size / SD of tumor motion < 2
§
Optimal intensity map WITHOUT MARGIN, only pure
intensity scaling to compensate for blurring created by motion
Ø
Tumor size / SD of tumor motion > 2
§
Optimal intensity map by combining margin and intensity
scaling
•
Using edge enhancement
Ø
Tumor size / SD of tumor motion < 2
§
Again only intensity scaling required
Ø
Tumor size / SD of tumor motion > 2
§
Edge enhancement is the preferred solution.
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SBRT 2016 - D. Verellen