BACKGROUND AND PURPOSE: In this study, a new method is introduced, which allows the overlay of three-dimensional structures, that have been delineated on transverse slices, onto the fluoroscopy from conventional simulators in real time. PATIENTS AND METHODS: Setup deviations between volumetric imaging and simulation were visualized, measured and corrected for 701 patient isocenters. RESULTS: Comparing the accuracy to mere virtual simulation lacking additional X-ray imaging, a clear benefit of the new method could be shown. On average, virtual prostate simulations had to be corrected by 0.48 cm (standard deviation [SD] 0.38), and those of the breast by 0.67 cm (SD 0.66). CONCLUSION: The presented method provides an easy way to determine entity-specific safety margins related to patient setup errors upon registration of bony anatomy (prostate 0.9 cm for 90% of cases, breast 1.3 cm). The important role of planar X-ray imaging was clearly demonstrated. The innovation can also be applied to adaptive image-guided radiotherapy (IGRT) protocols.
BACKGROUND AND PURPOSE: In this study, a new method is introduced, which allows the overlay of three-dimensional structures, that have been delineated on transverse slices, onto the fluoroscopy from conventional simulators in real time. PATIENTS AND METHODS: Setup deviations between volumetric imaging and simulation were visualized, measured and corrected for 701 patient isocenters. RESULTS: Comparing the accuracy to mere virtual simulation lacking additional X-ray imaging, a clear benefit of the new method could be shown. On average, virtual prostate simulations had to be corrected by 0.48 cm (standard deviation [SD] 0.38), and those of the breast by 0.67 cm (SD 0.66). CONCLUSION: The presented method provides an easy way to determine entity-specific safety margins related to patient setup errors upon registration of bony anatomy (prostate 0.9 cm for 90% of cases, breast 1.3 cm). The important role of planar X-ray imaging was clearly demonstrated. The innovation can also be applied to adaptive image-guided radiotherapy (IGRT) protocols.
Authors: Tanja Langsenlehner; Carmen Döller; Franz Quehenberger; Heidi Stranzl-Lawatsch; Uwe Langsenlehner; Karl Pummer; Karin S Kapp Journal: Strahlenther Onkol Date: 2010-03-26 Impact factor: 3.621
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Authors: Alexandra D Jensen; Christian Grehn; Anna Nikoghosyan; Christian Thieke; Robert Krempien; Peter E Huber; Jürgen Debus; Marc W Münter Journal: Strahlenther Onkol Date: 2009-08-28 Impact factor: 3.621
Authors: Olaf Nairz; Florian Merz; Heinz Deutschmann; Peter Kopp; Helmut Schöller; Franz Zehentmayr; Karl Wurstbauer; Gerhard Kametriser; Felix Sedlmayer Journal: Strahlenther Onkol Date: 2008-12-24 Impact factor: 3.621
Authors: Franz Zehentmayr; Karl Wurstbauer; Heinz Deutschmann; Christoph Fussl; Peter Kopp; Karin Dagn; Gerd Fastner; Peter Porsch; Michael Studnicka; Felix Sedlmayer Journal: Strahlenther Onkol Date: 2014-09-23 Impact factor: 3.621
Authors: Karl Wurstbauer; Heinz Deutschmann; Karin Dagn; Peter Kopp; Franz Zehentmayr; Bernd Lamprecht; Peter Porsch; Birgit Wegleitner; Michael Studnicka; Felix Sedlmayer Journal: Radiat Oncol Date: 2013-03-05 Impact factor: 3.481