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Improving the Consistency in Cervical Esophageal Target Volume Definition by Special Training
International Journal of Radiation Oncology, Biology, Physics (2002)
  • Patricia Tai
  • Jake Van Dyk, University of Western Ontario
  • Jerry Battista, University of Western Ontario
  • Edward Yu, University of Western Ontario
  • Larry Stitt, University of Western Ontario
  • Jon Tonita
  • Olusegun Agboola
  • James Brierley
  • Rashid Dar, University of Western Ontario
  • Christopher Leighton
  • Shawn Malone
  • Barbara Strang
  • Pauline Truong
  • Gregory Videtic
  • C. Shun Wong
  • Rebecca Wong
  • Youssef Youssef
PURPOSE: Three-dimensional conformal radiation therapy requires the precise definition of the target volume. Its potential benefits could be offset by the inconsistency in target definition by radiation oncologists. In a previous survey of radiation oncologists, a large degree of variation in target volume definition of cervical esophageal cancer was noted for the boost phase of radiotherapy. The present study evaluated whether special training could improve the consistency in target volume definitions. METHODS AND MATERIALS: A pre-training survey was performed to establish baseline values. This was followed by a special one-on-one training session on treatment planning based on the RTOG 94-05 protocol to 12 radiation oncologists. Target volumes were redrawn immediately and at 1-2 months later. Post-training vs. pre-training target volumes were compared. RESULTS: There was less variability in the longitudinal positions of the target volumes post-training compared to pre-training (p < 0.05 in 5 of 6 comparisons). One case had more variability due to the lack of a visible gross tumor on CT scans. Transverse contours of target volumes did not show any significant difference pre- or post-training. CONCLUSION: For cervical esophageal cancer, this study suggests that special training on protocol guidelines may improve consistency in target volume definition. Explicit protocol directions are required for situations where the gross tumor is not easily visible on CT scans. This may be particularly important for multicenter clinical trials, to reduce the occurrences of protocol violations.
  • Education,
  • Medical,
  • Continuing,
  • Esophageal Neoplasms,
  • Humans,
  • Imaging,
  • Three-Dimensional,
  • Physical Phenomena,
  • Physics,
  • Radiation Oncology,
  • Radiotherapy,
  • Conformal,
  • Tomography,
  • X-Ray Computed
Publication Date
July 1, 2002
Citation Information
Patricia Tai, Jake Van Dyk, Jerry Battista, Edward Yu, et al.. "Improving the Consistency in Cervical Esophageal Target Volume Definition by Special Training" International Journal of Radiation Oncology, Biology, Physics Vol. 53 Iss. 3 (2002)
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