Image Quality in Attenuation-Based and Phase-Contrast-Based X-ray Imaging

Author(s)
Gureyev, Timur E
Nesterets, Yakov I
Publication Date
2018
Abstract
This chapter provides an overviews the statistical decision theory and the associated objective image quality assessment. It focuses on the behavior of the noise propagation in computed tomography (CT) imaging systems, with and without in-line phase-contrast. The chapter analyzes the effect on noise of a widely used phase retrieval approach, based on the Transport of Intensity equation (TIE). It presents an approach, based on the noise power spectrum formalism, for quantifying noise in phase retrieved X-ray radiographs, as well as in phase-contrast computed tomography. Using this approach, in-line phase-contrast imaging in combination with a popular TIE-Hom phase retrieval algorithm has been analyzed and compared with conventional imaging in terms of the noise in the reconstructed projections and CT images. A gain factor has been introduced in order to evaluate the improvement of image quality, in terms of the variance of noise, due to phase retrieval.
Citation
Handbook of X-ray Imaging: Physics and Technology, p. 275-307
ISBN
9781498741521
1498741525
9781351228251
9781498741545
1351228250
1498741541
Link
Publisher
CRC Press
Series
Series in Medical Physics and Biomedical Engineering
Edition
1
Rights
Attribution 4.0 International
Title
Image Quality in Attenuation-Based and Phase-Contrast-Based X-ray Imaging
Type of document
Book Chapter
Entity Type
Publication

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