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26.07.2021 | History

1 edition of Transport Equation and Tomography found in the catalog.

Transport Equation and Tomography

A Brief Global History, Combined Volume

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        StatementDe Gruyter, Inc.
        PublishersDe Gruyter, Inc.
        Classifications
        LC Classifications2002
        The Physical Object
        Paginationxvi, 65 p. :
        Number of Pages81
        ID Numbers
        ISBN 10nodata
        Series
        1nodata
        2
        3

        nodata File Size: 4MB.


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Like the original XCAT description, all bone regions are represented by a dense, homogeneous, cortical bone-like material. Pressing return in any of the input boxes will update the graph. 5 Level-set methods follow the principles of the classic transport equation, but they require a further computation step called re-initialization in order to maintain the Eulerian distance function condition. 45 5 Conclusion This study benchmarked the Acuros CTD software for CT organ dose estimation using TG 195.

Geant4 simulations were conducted with an in-house distributed network of computers HTCondor, University of Wisconsin, Madison, WI, USA without any acceleration or variance reduction.

Inverse and Ill

Figure 3 Energy deposited in axial fan beam scan simulation. Equation 1 can be further detailed by developing its terms:• Conclusions: Acuros CTS enables a fast and accurate calculation of scatter images by deterministically solving the LBTE thus offering a computationally attractive alternative to Monte Carlo methods. Acuros was run on a standard workstation, with the core algorithms written in the CUDA programming language CUDA 8. The large cone beam is evident in the coronal and sagittal slices, with secondary dose outside of the beam evident as well.

Transport Equation and Tomography (Inverse and Ill

29 describes a similar deterministic approach to estimate dose in a uniform CTDI phantom in 21 min. The Geant4 results show excellent agreement with TG 195, validating our implementation and enabling us to apply it as the gold standard for other simulations.

36 While versions of the Acuros software have been validated for the higher energies used in radiation therapy, additional validation is needed for diagnostic imaging due to the different energy range and simplifying assumptions like not modeling electron transport. Referring to equation 2, the convection term represents the transportation of the chemical component with the fluid, while the diffusive term represents a chemical reaction or molecular diffusion phenomena that could occur in the flow.

The difference image shows good agreement in the soft tissue but some disagreement Transport Equation and Tomography the bone, with Acuros slightly overestimating in the ribs and underestimating in the vertebral bodies. Estimation of organ and effective dose due to Compton backscatter security scans.

With the segmentation process, it is possible to identify objects inside a digital image i.