MO‐D‐M100F‐01: Emerging Techniques Using Digital Tomosynthesis
In‐room radiolographic imaging systems is being rapidly implemented in routine clinical operations for target localization. A typical system consists of a kV x‐ray source and an amorphous‐silicon flat panel detector mounted orthogonally to the MV‐beam axis. The available clinical imaging capabilities from this configuration are 2‐D radiographic or fluoroscopic imaging and 3‐D CBCT. These techniques may have potential limitations either on not sufficient anatomical information for positioning verification (such as 2‐D technology) or long imaging time (several breathing cycles), mechanical constraints, and excessive dose to the imaging volume (such as CBCT technology). Therefore, limited‐angle digital tomosynthesis (DTS) is being investigated as an alternative 3‐D imaging technique. Much of the investigations have been focused on the clinical feasibility and efficacy of using DTS for on‐board target localization and comparison between DTS technology with 2‐D radiographic and CBCT technologies. This talk will summarize emerging clinical research to develop the DTS technology for on‐line patient positioning and target localization for image guided radiation therapy, specifically for anatomical sites of head and neck, abdomen, breast and prostate. Educational Objectives: 1. Brief review of DTS imaging technique in the treatment room. 2. Clinical feasibility and efficacy of using DTS for in‐room target localization. © 2007, American Association of Physicists in Medicine. All rights reserved.
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