@InProceedings{AssisSalvMascLeva:2015:PrPo,
author = "Assis, Vinicius Covre de and Salvadeo, Denis Henrique Pinheiro and
Mascarenhas, Nelson Delfino d'{\'A}vila and Levada, Alexandre
Lu{\'{\i}}s Magalh{\~a}es",
affiliation = "{State University of S{\~a}o Paulo} and {State University of
S{\~a}o Paulo} and {Faculdade Campo Limpo Paulista} and {Federal
University of Sa \̃o Carlos}",
title = "Double Noise Filtering in CT: Pre- and Post-Reconstruction",
booktitle = "Proceedings...",
year = "2015",
editor = "Papa, Jo{\~a}o Paulo and Sander, Pedro Vieira and Marroquim,
Ricardo Guerra and Farrell, Ryan",
organization = "Conference on Graphics, Patterns and Images, 28. (SIBGRAPI)",
publisher = "IEEE Computer Society",
address = "Los Alamitos",
keywords = "computed tomography (CT), double denoising.",
abstract = "Motivated by the ALARA (As Low As Reasonably Achievable)
principle, this paper proposes to denoise Computed Tomography (CT)
images by using a double-filtering approach. First, projection
data were filtered using methods to filter Poisson noise
(pre-filtering step). Then the filtered backprojection (FBP)
algorithm was applied to image reconstruction. After, the
reconstructed images were denoised by using suitable methods for
filtering Gaussian noise (post-filtering step). Finally, known
metrics of image quality evaluation (such as SSIM and PSNR) were
used to compare the filtered images with the ones considered ideal
images in various combinations of filters. The results lead to the
conclusion that a second filtering applied on image domain can
improve the CT denoising quality from pre-filtering step. Thus, CT
double-filtering strategy achieved a better balance between noise
reduction and details preservation.",
conference-location = "Salvador, BA, Brazil",
conference-year = "26-29 Aug. 2015",
doi = "10.1109/SIBGRAPI.2015.42",
url = "http://dx.doi.org/10.1109/SIBGRAPI.2015.42",
language = "en",
ibi = "8JMKD3MGPBW34M/3JMN38B",
url = "http://urlib.net/ibi/8JMKD3MGPBW34M/3JMN38B",
targetfile = "PID3771603.pdf",
urlaccessdate = "2024, Apr. 29"
}