Sammanfattning

With increased resolution in x-ray computed tomography, refraction adds increasingly to the attenuation signal. Though potentially beneficial, the artifacts caused by refraction often need to be removed from the image. In this paper, we propose a postprocessing method, based on deconvolution, that is able to remove these artifacts after conventional reconstruction. This method poses two advantages over existing projection-based (preprocessing) phase-retrieval or phase-removal algorithms. First, evaluation of the parameters can be done very quickly, improving the overall speed of the method. Second, postprocessing methods can be applied when projection data is not available, which occurs in several commercial systems with closed software or when projection data has been deleted. It is shown that the proposed method performs comparably to state-of-the-art methods in terms of image quality. (C) 2013 Optical Society of America

Publicerad i

Journal of the Optical Society of America A
2013, Volym: 30, nummer: 3, sidor: 455-461
Utgivare: OPTICAL SOC AMER

SLU författare

• Wernersson, Erik

  • Centre for Image Analysis, Sveriges lantbruksuniversitet
    

• Luengo, Cris

  • Centre for Image Analysis, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Radiologi och bildbehandling
Medicinsk bildbehandling
Datorseende och robotik (autonoma system)


Publikationens identifierare

DOI: https://doi.org/10.1364/JOSAA.30.000455

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/52924