2007
DOI: 10.1118/1.2747050
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Evaluation of the precision of portal‐image‐guided head‐and‐neck localization: An intra‐ and interobserver study

Abstract: There is increasing evidence that, for some patients, image-guided intensity-modulated radiation therapy (IMRT) for head-and-neck cancer patients may maintain target dose coverage and critical organ (e.g., parotids) dose closer to the planned doses than setup using lasers alone. We investigated inter- and intraobserver uncertainties in patient setup in head-and-neck cancer patients. Twenty-two sets of orthogonal digital portal images (from five patients) were selected from images used for daily localization of… Show more

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Cited by 9 publications
(7 citation statements)
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“…Given that interobserver and intraobserver errors from electronic portal image matching have been estimated as approximately 1 mm, these results demonstrate that multiple VBHs are stable and reproducible. 17,18 Brouwers et al 15 published a comprehensive set of data from an in vivo dosimetry system using EPI for 15 FB and 28 VBH cases. Our in vivo dosimetry data are of similar magnitude.…”
Section: Discussionmentioning
confidence: 99%
“…Given that interobserver and intraobserver errors from electronic portal image matching have been estimated as approximately 1 mm, these results demonstrate that multiple VBHs are stable and reproducible. 17,18 Brouwers et al 15 published a comprehensive set of data from an in vivo dosimetry system using EPI for 15 FB and 28 VBH cases. Our in vivo dosimetry data are of similar magnitude.…”
Section: Discussionmentioning
confidence: 99%
“…On‐line mega‐voltage (MV) imaging has been successfully used for daily image‐guided patient setup for many years, including orthogonal imaging, helical computed tomography (CT), and cone‐beam CT (CBCT) 1, 2, 3, 4, 5. Since the early 2000s, however, there has been a significant increase in the use of kilo‐voltage imaging for in‐room patient setup, including orthogonal imaging, helical CT (CT‐on‐rails), and CBCT 6.…”
Section: Introductionmentioning
confidence: 99%
“…A host of planar and volumetric image-guidance platforms are available commercially, some with distinctive proprietary features (Zeidan et al 2007, Pouliot et al 2006, Meyer et al 2007, McBain et al 2006, Letourneau et al 2005, Jaffray et al 2002, Godfrey et al 2006, Court et al 2007). To date, the vast majority of target localization series have focused upon prostatic cancer (Fuss et al 2003, Lohr et al 2007, Scarbrough et al 2006).…”
Section: Discussionmentioning
confidence: 99%