High-resolution coded-aperture design for compressive X-ray tomography using low resolution detectors

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High-resolution coded-aperture design for compressive X-ray tomography using low resolution detectors. / Mojica, Edson; Pertuz, Said; Arguello, Henry.

In: Optics Communications, Vol. 404, 2017, p. 103-109.

Research output: Contribution to journal › Article › Scientific › peer-review

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Mojica, Edson ; Pertuz, Said ; Arguello, Henry. / High-resolution coded-aperture design for compressive X-ray tomography using low resolution detectors. In: Optics Communications. 2017 ; Vol. 404. pp. 103-109.

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@article{ee66881943394fd3830639ad7e524f5a,

title = "High-resolution coded-aperture design for compressive X-ray tomography using low resolution detectors",

abstract = "One of the main challenges in Computed Tomography (CT) is obtaining accurate reconstructions of the imaged object while keeping a low radiation dose in the acquisition process. In order to solve this problem, several researchers have proposed the use of compressed sensing for reducing the amount of measurements required to perform CT. This paper tackles the problem of designing high-resolution coded apertures for compressed sensing computed tomography. In contrast to previous approaches, we aim at designing apertures to be used with low-resolution detectors in order to achieve super-resolution. The proposed method iteratively improves random coded apertures using a gradient descent algorithm subject to constraints in the coherence and homogeneity of the compressive sensing matrix induced by the coded aperture. Experiments with different test sets show consistent results for different transmittances, number of shots and super-resolution factors.",

keywords = "Coded apertures, Compressive sensing, Computed tomography, Super-resolution",

author = "Edson Mojica and Said Pertuz and Henry Arguello",

year = "2017",

doi = "10.1016/j.optcom.2017.06.053",

language = "English",

volume = "404",

pages = "103--109",

journal = "Optics Communications",

issn = "0030-4018",

publisher = "Elsevier",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - High-resolution coded-aperture design for compressive X-ray tomography using low resolution detectors

AU - Mojica, Edson

AU - Pertuz, Said

AU - Arguello, Henry

PY - 2017

Y1 - 2017

N2 - One of the main challenges in Computed Tomography (CT) is obtaining accurate reconstructions of the imaged object while keeping a low radiation dose in the acquisition process. In order to solve this problem, several researchers have proposed the use of compressed sensing for reducing the amount of measurements required to perform CT. This paper tackles the problem of designing high-resolution coded apertures for compressed sensing computed tomography. In contrast to previous approaches, we aim at designing apertures to be used with low-resolution detectors in order to achieve super-resolution. The proposed method iteratively improves random coded apertures using a gradient descent algorithm subject to constraints in the coherence and homogeneity of the compressive sensing matrix induced by the coded aperture. Experiments with different test sets show consistent results for different transmittances, number of shots and super-resolution factors.

AB - One of the main challenges in Computed Tomography (CT) is obtaining accurate reconstructions of the imaged object while keeping a low radiation dose in the acquisition process. In order to solve this problem, several researchers have proposed the use of compressed sensing for reducing the amount of measurements required to perform CT. This paper tackles the problem of designing high-resolution coded apertures for compressed sensing computed tomography. In contrast to previous approaches, we aim at designing apertures to be used with low-resolution detectors in order to achieve super-resolution. The proposed method iteratively improves random coded apertures using a gradient descent algorithm subject to constraints in the coherence and homogeneity of the compressive sensing matrix induced by the coded aperture. Experiments with different test sets show consistent results for different transmittances, number of shots and super-resolution factors.

KW - Coded apertures

KW - Compressive sensing

KW - Computed tomography

KW - Super-resolution

U2 - 10.1016/j.optcom.2017.06.053

DO - 10.1016/j.optcom.2017.06.053

M3 - Article

VL - 404

SP - 103

EP - 109

JO - Optics Communications

JF - Optics Communications

SN - 0030-4018

ER -

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