Metal artifact reduction by projection replacements and non-local prior image integration

Maik Stille; Thorsten M. Buzug

doi:10.1515/cdbme-2015-0026

Metal artifact reduction by projection replacements and non-local prior image integration

Institut für Medizintechnik

Abstract

Originalsprache	Englisch
Zeitschrift	Current Directions in Biomedical Engineering
Jahrgang	1
Ausgabenummer	1
Seiten (von - bis)	100-103
Seitenumfang	4
DOIs	https://doi.org/10.1515/cdbme-2015-0026
Publikationsstatus	Veröffentlicht - 12.09.2015

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10.1515/cdbme-2015-0026

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@article{ba82213c44cf440e90b5bf704baaa2ed,

title = "Metal artifact reduction by projection replacements and non-local prior image integration",

abstract = "The presence of high-density objects remains an open problem in medical CT imaging. Data of projections that passing through such objects are dominated by noise. Reconstructed images become less diagnostically conclusive because of pronounced artifacts that manifest as dark and bright streaks. A new reconstruction algorithm is proposed, which incorporates information gained from a prior image. Based on a non-local regularization, these information are used to reduce streaking artifacts. In an iterative scheme, the prior image is transformed in order to match intermediate results of the reconstruction by solving a registration problem. During iterations, temporally appearing artifacts are reduced with a bilateral filter and projection values passing through high-density objects are replaced by new calculated values, which are used further on for the reconstruction. Results show that the proposed algorithm significantly reduces streaking artifacts. ",

author = "Maik Stille and Buzug, \{Thorsten M.\}",

year = "2015",

month = sep,

day = "12",

doi = "10.1515/cdbme-2015-0026",

language = "English",

volume = "1",

pages = "100--103",

journal = "Current Directions in Biomedical Engineering",

publisher = "Walter de Gruyter GmbH",

number = "1",

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TY - JOUR

T1 - Metal artifact reduction by projection replacements and non-local prior image integration

AU - Stille, Maik

AU - Buzug, Thorsten M.

PY - 2015/9/12

Y1 - 2015/9/12

N2 - The presence of high-density objects remains an open problem in medical CT imaging. Data of projections that passing through such objects are dominated by noise. Reconstructed images become less diagnostically conclusive because of pronounced artifacts that manifest as dark and bright streaks. A new reconstruction algorithm is proposed, which incorporates information gained from a prior image. Based on a non-local regularization, these information are used to reduce streaking artifacts. In an iterative scheme, the prior image is transformed in order to match intermediate results of the reconstruction by solving a registration problem. During iterations, temporally appearing artifacts are reduced with a bilateral filter and projection values passing through high-density objects are replaced by new calculated values, which are used further on for the reconstruction. Results show that the proposed algorithm significantly reduces streaking artifacts.

AB - The presence of high-density objects remains an open problem in medical CT imaging. Data of projections that passing through such objects are dominated by noise. Reconstructed images become less diagnostically conclusive because of pronounced artifacts that manifest as dark and bright streaks. A new reconstruction algorithm is proposed, which incorporates information gained from a prior image. Based on a non-local regularization, these information are used to reduce streaking artifacts. In an iterative scheme, the prior image is transformed in order to match intermediate results of the reconstruction by solving a registration problem. During iterations, temporally appearing artifacts are reduced with a bilateral filter and projection values passing through high-density objects are replaced by new calculated values, which are used further on for the reconstruction. Results show that the proposed algorithm significantly reduces streaking artifacts.

U2 - 10.1515/cdbme-2015-0026

DO - 10.1515/cdbme-2015-0026

M3 - Journal articles

VL - 1

SP - 100

EP - 103

JO - Current Directions in Biomedical Engineering

JF - Current Directions in Biomedical Engineering

IS - 1

ER -

Metal artifact reduction by projection replacements and non-local prior image integration

Abstract

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