Quantification of organ motion during chemoradiotherapy of rectal cancer using cone-beam computed tomography.
AffiliationRoyal Marsden National Health Service Foundation Trust, Sutton, Surrey, United Kingdom.
KeywordsCone-Beam Computed Tomography
Aged, 80 and over
Analysis of Variance
Cone-Beam Computed Tomography
Radiotherapy Planning, Computer-Assisted
Radiotherapy Setup Errors
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CitationQuantification of organ motion during chemoradiotherapy of rectal cancer using cone-beam computed tomography. 2011, 81 (4):e431-8 Int. J. Radiat. Oncol. Biol. Phys.
JournalInternational journal of radiation oncology, biology, physics
AbstractThere has been no previously published data related to the quantification of rectal motion using cone-beam computed tomography (CBCT) during standard conformal long-course chemoradiotherapy. The purpose of the present study was to quantify the interfractional changes in rectal movement and dimensions and rectal and bladder volume using CBCT and to quantify the bony anatomy displacements to calculate the margins required to account for systematic (Σ) and random (σ) setup errors.