Posters, Symposia, etc., School of Biomedical Engineering and Sciences

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https://hdl.handle.net/10919/56516

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Browsing Posters, Symposia, etc., School of Biomedical Engineering and Sciences by Subject "CT scanners"

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    Development and Applications of Interior Tomography - Multi-source Interior Tomography for Ultrafast Performance
    Wang, Ge; Ritman, Erik; Ye, Yangbo; Katsevich, Alexander; Yu, Hengyong; Cao, Guohua; Zhou, Otto (2010-04-05)
    Conventional tomography allows excellent reconstruction of an object from non-truncated projections. The long-standing interior problem is to reconstruct an interior ROI accurately only from local projection segments. Interior tomography solves the interior problem with practical knowledge such as a known sub-region or a sparsity model using compressive sensing. Advantages of interior tomography include radiation dose reduction (no x-rays go outside an ROI), scattering artifact suppression (no cross-talk from radiation outside the ROI), image quality improvement (with the novel reconstruction approach), large object handling (measurement can be truncated in any direction), and ultrafast imaging performance (with multiple source detector chains tightly integrated targeting the ROI).
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    Results in the Past
    Wang, Ge (2010-02-04)
    Past research results include the following: • Modern CT scanners that use spiral-beam scanning and perform >100-million scans annually in the USA • Construction of the only 500nm resolution micro-CT system on the East Coast and the only 50nm nano-CT system with the interior tomography capability in the world from inside the walls of SAM-CT x-ray imaging facility • With further promise to handle large objects, reduce radiation dose, and improve temporal resolution, Interior tomography has already been extended to SPECT, MRI and other imaging modalities • A 3D analysis of the underlying molecular/cellular activities is taken from a mouse subject with an embedded bioluminescent source after an imaging model is built, linking the bioluminescent measurement and the source distribution.