A ring artifact suppression algorithm based on a priori information

Titarenko, Sofya; Titarenko, Valeriy; Kyrieleis, Albrecht; Withers, Philip J.
August 2009
Applied Physics Letters;8/17/2009, Vol. 95 Issue 7, p071113
Academic Journal
In this letter, ring artifacts in two-dimensional (2D) tomographic slices are considered. For a parallel beam geometry we propose an interactive algorithm, which removes the artifacts while preserving fine image details. The algorithm comprises two stages and is based on a priori information about the true attenuation coefficient in some areas of a 2D slice. Even in the absence of any a priori information the initial stage of the algorithm can already provide good ring artifact suppression.


Related Articles

  • An automatic classification technique for attenuation correction in positron emission tomography. Bettinardi, V.; Pagani, E.; Gilardi, M. C.; Landoni, C.; Riddell, C.; Rizzo, G.; Castiglioni, I.; Belluzzo, D.; Lucignani, G.; Schubert, S.; Fazio, F. // European Journal of Nuclear Medicine;1999, Vol. 26 Issue 5, p447 

    Abstract. In this paper a clustering technique is proposed for attenuation correction (AC) in positron emission tomography (PET). The method is unsupervised and adaptive with respect to counting statistics in the transmission (TR) images. The technique allows the classification of pre- or...

  • Cardiac single-photon emission tomography: is attenuation correction enough? Hutton, Brian F. // European Journal of Nuclear Medicine;1997, Vol. 24 Issue 7, p713 

    Consider the possible solutions to improve cardiac single-photon emission tomography. Application of attenuation correction to reduce the uncertainty of the procedure; Compensation for the distance-dependent resolution; Reasons for the reduced perfusion of the procedure.

  • PET attenuation coefficients from CT images: experimental evaluation of the transformation of CT into PET 511-keV attenuation coefficients. Burger, C.; Goerres, G.; Schoenes, S.; Buck, A.; Lonn, R.; von Schulthess, K. // European Journal of Nuclear Medicine & Molecular Imaging;2002, Vol. 29 Issue 7, p922 

    The CT data acquired in combined PET/CT studies provide a fast and essentially noiseless source for the correction of photon attenuation in PET emission data. To this end, the CT values relating to attenuation of photons in the range of 40-140 keV must be transformed into linear attenuation...

  • Influence of OSEM and segmented attenuation correction in the calculation of standardised uptake values for [[sup 18] F]FDG PET. Visvikis, D.; Cheze-LeRest, C.; Costa, D. C.; Bomanji, J.; Gacinovic, S.; Ell, P. J. // European Journal of Nuclear Medicine;2001, Vol. 28 Issue 9, p1326 

    Standardised Uptake Values (SUVs) are widely used in positron emission tomography (PET) as a semi-quantitative index of fluorine-18 labelled fluorodeoxyglucose uptake. The objective of this study was to investigate any bias introduced in the calculation of SUVs as a result of employing ordered...

  • Treasure Trove report.  // History Scotland Magazine;Sep/Oct2012, Vol. 12 Issue 5, p15 

    The article discusses the 2011-2012 Treasure Trove report, which states the amount of money Scottish citizens received for discovering artifacts, and lists some of the artifacts detailed in the report, such as a 17th-century gold ring, a Bronze Age axe, and a medieval weight set.

  • Maximum likelihood estimates in correlation acoustic thermotomography. Burov, V. A.; Kasatkina, E. E.; Mar'in, A. O.; Rumyantseva, O. D. // Acoustical Physics;Jul2007, Vol. 53 Issue 4, p508 

    Informative capabilities of active—passive acoustic thermotomography that allows a separate reconstruction of the local values of intrinsic and background temperature, absorption coefficient, and ultrasonic velocity are discussed. An iterative procedure based on the maximum likelihood...

  • The Double Life of Aufret – Revealed. Gannon, Anna // Antiquaries Journal;Jan2012, Vol. 92, p115 

    The Aufret ring, acquired by the Victoria and Albert Museum in 1871, has long been considered an Anglo-Saxon artefact, its inscription counted as part of the Anglo-Saxon heritage. Because of the similarity between the names Aufret and Alfred, it became associated with this king and with a...

  • Impact of attenuation correction and gated acquisition in SPECT myocardial perfusion imaging: results of the multicentre SPAG (SPECT Attenuation Correction vs Gated) study. Genovesi, Dario; Giorgetti, Assuero; Gimelli, Alessia; Kusch, Annette; D'Aragona Tagliavia, Irene; Casagranda, Mirta; Cannizzaro, Giorgio; Giubbini, Raffaele; Bertagna, Francesco; Fagioli, Giorgio; Rossi, Massimiliano; Romeo, Annadina; Bertolaccini, Pietro; Bonini, Rita; Marzullo, Paolo // European Journal of Nuclear Medicine & Molecular Imaging;Oct2011, Vol. 38 Issue 10, p1890 

    Purpose: In clinical myocardial single photon emission computed tomography (SPECT), attenuation artefacts may cause a loss of specificity in the identification of diseased vessels that can be corrected by means of gated SPECT (GSPECT) acquisition or CT attenuation correction (AC). The purpose of...

  • Positron emission tomography/computed tomography—imaging protocols, artifacts, and pitfalls. Bockisch, Andreas; Beyer, Thomas; Antoch, Gerald; Freudenberg, Lutz S.; Kühl, Hilmar; Debatin, Jörg F.; Müller, Stefan P. // Molecular Imaging & Biology;Jul2004, Vol. 6 Issue 4, p188 

    There has been a longstanding interest in fused images of anatomical information, such as that provided by computed tomography (CT) or magnetic resonance imaging (MRI) systems, with biological information obtainable by positron emission tomography (PET). The near-simultaneous data acquisition in...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics