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Adaptive Planning Based on CBCT 2
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Recalculation of planned dose using CBCT
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Are HU on CBCTs accurate?
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Some conflicting evidence in the literature
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Depends on the quality of your CBCT
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Options to overcome these uncertainties:
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Pixel correction technique
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CT numbers from conventional CT are applied to CBCT
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Deformable registration
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Deform planning CT to the CBCT to calculate “dose of the day”
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This is a move towards “online” ART