Considering Lumpectomy Cavity PTV Expansions: Characterization of Intrafraction Lumpectomy Cavity Motion

Emily C Merfeld,Grace C Blitzer,Aleksandra Kuczmarska-Haas,Jacob S Witt,Andrzej P Wojcieszynski,Kathryn M Mittauer,Patrick M Hill,John E Bayouth,Poonam Yadav,Bethany M Anderson

Practical Radiation Oncology（2023）

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摘要

In approximately 90% of analyzed frames, intrafraction displacement of the lumpectomy cavity was <5 mm, with even less motion expected with deep inspiratory breath hold. Our results suggest reduced PTV expansions of 5 mm would be sufficient to account for lumpectomy cavity position, which may accordingly reduce late toxicity and improve cosmetic outcomes.

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lumpectomy cavity ptv expansions

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