• Login
    View Item 
    •   Home
    • The Christie Research Publications Repository
    • All Christie Publications
    • View Item
    •   Home
    • The Christie Research Publications Repository
    • All Christie Publications
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of ChristieCommunitiesTitleAuthorsIssue DateSubmit DateSubjectsThis CollectionTitleAuthorsIssue DateSubmit DateSubjects

    My Account

    LoginRegister

    Local Links

    The Christie WebsiteChristie Library and Knowledge Service

    Statistics

    Display statistics

    Analysis of x-ray computed tomography images using the noise power spectrum and autocorrelation function.

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Authors
    Faulkner, K
    Moores, B M
    Affiliation
    Department of Medical Physics & Bioengineering, Christie Hospital & Holt Radium Institute, Wilmslow Road, Withington, Manchester, M20 9BX, UK
    Issue Date
    1984-11
    
    Metadata
    Show full item record
    Abstract
    A discrete representation of the reconstruction process, consistent with the method of data collection, has been used to derive expressions for the noise power spectrum, autocorrelation function and noise equivalent quanta (NEQ) of a computed tomography (CT) image. These parameters have been expressed in terms of basic scanning factors such as tube current, exposure time, slice width and number of detectors. Each of these factors affects the overall magnitude of the noise power spectrum, but the spatial frequency dependence is also determined by the type of reconstruction filter used in the computer algorithm. The noise power spectrum has been calculated for scanners employing either a ramp or Hanning weighted ramp filter. Predictions made from this theoretical analysis have been compared with experimental measurements made on various CT scanners. Measurements were made of the modulation transfer function (MTF) by techniques which permitted us to deduce the contributions of the algorithmic and non-algorithmic components to the overall MTF. NEQ values have been calculated for a number of CT scanners.
    Citation
    Analysis of x-ray computed tomography images using the noise power spectrum and autocorrelation function. 1984, 29 (11):1343-52 Phys Med Biol
    Journal
    Physics in Medicine and Biology
    URI
    http://hdl.handle.net/10541/124408
    DOI
    10.1088/0031-9155/29/11/003
    PubMed ID
    6505016
    Type
    Article
    Language
    en
    ISSN
    0031-9155
    EISSN
    1361-6560
    ae974a485f413a2113503eed53cd6c53
    10.1088/0031-9155/29/11/003
    Scopus Count
    Collections
    All Christie Publications

    entitlement

    Related articles

    • Characterization of imaging performance in differential phase contrast CT compared with the conventional CT: spectrum of noise equivalent quanta NEQ(k).
    • Authors: Tang X, Yang Y, Tang S
    • Issue date: 2012 Jul
    • Realistic simulation of reduced-dose CT with noise modeling and sinogram synthesis using DICOM CT images.
    • Authors: Won Kim C, Kim JH
    • Issue date: 2014 Jan
    • Characteristic performance evaluation of a photon counting Si strip detector for low dose spectral breast CT imaging.
    • Authors: Cho HM, Barber WC, Ding H, Iwanczyk JS, Molloi S
    • Issue date: 2014 Sep
    • Noise and contrast detection in computed tomography images.
    • Authors: Faulkner K, Moores BM
    • Issue date: 1984 Apr
    • The noise power spectrum in computed X-ray tomography.
    • Authors: Riederer SJ, Pelc NJ, Chesler DA
    • Issue date: 1978 May
    DSpace software (copyright © 2002 - 2021)  DuraSpace
    Quick Guide | Contact Us
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.