Image covariance and lesion detectability in direct fan-beam x-ray computed tomography.

Physics in Medicine and Biology
Adam Wunderlich, Frédéric Noo

Abstract

We consider noise in computed tomography images that are reconstructed using the classical direct fan-beam filtered backprojection algorithm, from both full- and short-scan data. A new, accurate method for computing image covariance is presented. The utility of the new covariance method is demonstrated by its application to the implementation of a channelized Hotelling observer for a lesion detection task. Results from the new covariance method and its application to the channelized Hotelling observer are compared with results from Monte Carlo simulations. In addition, the impact of a bowtie filter and x-ray tube current modulation on reconstruction noise and lesion detectability are explored for full-scan reconstruction.

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Citations

Jun 21, 2012·Physics in Medicine and Biology·Zhicong YuJoachim Hornegger
Dec 7, 2013·Theranostics·Xin He, Subok Park
May 31, 2014·Physics in Medicine and Biology·Yi ZhangCynthia H McCollough
Feb 24, 2010·Medical Physics·Cheng-Ying Chou, Mark A Anastasio
Jun 10, 2010·Medical Physics·Jongduk Baek, Norbert J Pelc
Feb 25, 2009·Medical Physics·Parinaz MassoumzadehBruce R Whiting
Jan 26, 2012·Medical Physics·I Hernandez-GironW J H Veldkamp
Jul 1, 2011·Medical Physics·Adam Wunderlich, Frédéric Noo
Jan 7, 2014·Medical Physics·Zhoubo LiArmando Manduca
Jan 10, 2016·Medical Physics·Rongping ZengKyle J Myers
Sep 30, 2014·IEEE Transactions on Medical Imaging·Adam WunderlichMarta E Heilbrun
Mar 20, 2010·IEEE Transactions on Medical Imaging·Adam Wunderlich, Frederic Noo
Jan 18, 2014·IEEE Transactions on Nuclear Science·Adam Wunderlich, Frédéric Noo
Mar 5, 2010·IEEE Transactions on Medical Imaging·Jonathan SperlMartin Brokate
Jun 28, 2012·IEEE Transactions on Medical Imaging·Adam Wunderlich, Frédéric Noo
Jan 24, 2009·IEEE Transactions on Medical Imaging·Adam Wunderlich, Frédéric Noo
Jun 17, 2015·IEEE Transactions on Bio-medical Engineering·Aria PezeshkNicholas Petrick
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Apr 6, 2017·Medical Physics·Annelise Malkus, Timothy P Szczykutowicz
Jun 24, 2020·Physics in Medicine and Biology·Jannis DickmannGeorgios Dedes

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