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    A Multiclass Model Observer for Multislice-Multiview Images

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    Authors
    Gifford, Howard C.
    Lehovich, A.
    King, Michael A.
    UMass Chan Affiliations
    Department of Radiology
    Document Type
    Conference Paper
    Publication Date
    2006-10-29
    Keywords
    Displays
    Humans
    Neoplasms
    Testing
    Volume measurement
    Lesions
    Lungs
    Image reconstruction
    Attenuation
    Scattering
    Analytical, Diagnostic and Therapeutic Techniques and Equipment
    Bioimaging and Biomedical Optics
    Biological and Chemical Physics
    Nuclear
    Nuclear Engineering
    Radiology
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    Link to Full Text
    https://www.ncbi.nlm.nih.gov/pmc/articles/pmc2633942/
    Abstract
    A human-model observer for tumor detection-localization studies featuring multislice-multiview (or volumetric) image displays has been introduced. This volumetric observer, an extension of multiclass linear observers previously tested with single-slice and multislice displays, produces rating and localization data by integrating perception measurements from the different image views. A channelized NPW (CNPW) version of the observer was evaluated against humans for a background-known-exactly (BKE) detection task involving localization of Tc-99m Neotect lesions in simulated SPECT lung images. An LROC study evaluated two RBI reconstruction strategies that used different combinations of corrections for attenuation, scatter, and distance-dependent system resolution, and coronal, sagittal, and transverse slices were presented to the observers. Model-observer ranking of these strategies did not match that of the humans. Follow-up studies exploring several possible remedies for the model observer, including strategy-specific search regions and an internal-noise mechanism, showed little change. Future work will examine variations from the BKE assumption as a means of reconciling the rankings.
    Source

    Gifford HC, Lehovich A, King MA. A Multiclass Model Observer for Multislice-Multiview Images. IEEE Nucl Sci Symp Conf Rec (1997). 2006;3:1687-1691. doi: 10.1109/NSSMIC.2006.354223. PMID: 19194524; PMCID: PMC2633942. Link to article on publisher's site

    DOI
    10.1109/NSSMIC.2006.354223
    Permanent Link to this Item
    http://hdl.handle.net/20.500.14038/29533
    PubMed ID
    19194524
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    Link to Article in PubMed

    ae974a485f413a2113503eed53cd6c53
    10.1109/NSSMIC.2006.354223
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    UMass Chan Faculty and Researcher Publications
    Radiology Publications

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