Utility of daily image guidance with intensity-modulated radiotherapy for tumors of the base of skull

Allen M. Chen, Suzan Cheng, D. Gregory Farwell, Quang Luu, Paul J. Donald, James Boggan, Stephen Franklin, James A. Purdy

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6 Scopus citations

Abstract

Background This study was carried out to report our experience using intensity-modulated radiotherapy (IMRT) with daily image-guided radiotherapy (IGRT) for tumors involving the base of skull. Methods In all, 100 patients were prospectively treated with IMRT to a median dose of 64 Gy (range, 45-70 Gy). Daily helical megavoltage computed tomography (MVCT) scans were obtained as part of an IGRT registration protocol for patient alignment. Results The 2-year local-regional control was 91%. A total of 3295 daily MVCT scans were obtained. The mean shift to account for interfraction motion was 1.18 ± 1.75 mm, 1.81 ± 1.34 mm, and 1.33 ± 1.19 mm for the medial-lateral (ML), superior-inferior (SI), and anterior-posterior (AP) directions, respectively. Pretreatment shifts of >3 mm occurred in 10%, 26%, and 18%, in the ML, SI, and AP directions, respectively. Conclusions The feasibility and efficacy of daily IGRT as a complement to IMRT for skull base were demonstrated.

Original languageEnglish
Pages (from-to)763-770
Number of pages8
JournalHead and Neck
Volume34
Issue number6
DOIs
StatePublished - Jun 1 2012
Externally publishedYes

Keywords

  • head and neck cancer
  • image-guided radiotherapy
  • intensity-modulated radiotherapy
  • on-board imaging
  • skull base

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    Chen, A. M., Cheng, S., Farwell, D. G., Luu, Q., Donald, P. J., Boggan, J., Franklin, S., & Purdy, J. A. (2012). Utility of daily image guidance with intensity-modulated radiotherapy for tumors of the base of skull. Head and Neck, 34(6), 763-770. https://doi.org/10.1002/hed.21805