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Title
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Use of a simulator with CT option in radiotherapy of macular degeneration
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Author
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Abstract
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| Purpose: To assess the accuracy of a conventional simulation procedure in radiotherapy of age-related macular degeneration, Methods and Materials: A computed tomographic (CT) extension attached to the treatment simulator was used to acquire CT images immediately after conventional simulation in 18 patients referred for treatment of age-related macular degeneration. Analysis was performed on 16 one-sided treatment cases for whom images were obtained. Error was estimated by the displacement between the observed treatment isocenter and the intended isocenter based on reconstructed eye geometry. Results: Based on single slice measurements, the mean error amplitude was 23 mm (range 0.2-5.6). Based on three dimensional eye globe reconstruction, the mean error amplitude was 2.8 mm (range 0.8-5.3). An incidental finding previously unreported was the lower image quality at the center of the simulator-CT image acquisition held. Conclusions: Small but significant errors from conventional simulation were noted. The integrated simulation-CT procedure may help correct the errors to improve the accuracy of simulation setup. The lower image quality at the tenter of image acquisition field requires adaptation of the simulation-CT procedure. (C) 1998 Elsevier Science Inc. |
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Language
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English
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Source (journal)
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International journal of radiation oncology, biology, physics. - Bedford
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Publication
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Bedford
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1998
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ISSN
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0360-3016
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DOI
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10.1016/S0360-3016(98)00070-4
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Volume/pages
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41
:3
(1998)
, p. 721-727
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ISI
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000074124700033
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Full text (Publisher's DOI)
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