Inpainting‑filtering for metal artifact reduction (IMIF‑MAR) in computed tomography

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dc.contributor.authorRodriguez-Gallo Guerra, Yakdiel
dc.contributor.authorOrozco Morales, Rubén
dc.contributor.authorPerez Diaz, Marlen
dc.contributor.departmentUniversidad Central "Marta Abreu"de las Villas. Facultad de Eléctrica. Departamento de automática.en_US
dc.date.accessioned2022-02-17T15:36:35Z
dc.date.available2022-02-17T15:36:35Z
dc.date.issued2021
dc.description.abstractThe reduction of metal artifacts remains a challenge in computed tomography because they decrease image quality, and consequently might affect the medical diagnosis. The objective of this study is to present a novel method to correct metal artifacts based solely on the CT-slices. The proposed method consists of four steps. First, metal implants in the original CTslice are segmented using an entropy based method, producing a metal image. Second, a prior image is acquired using three transformations: Gaussian filter, Parisotto and Schoenlieb inpainting method with the Mumford-Shah image model and L0 Gradient Minimization method (L0GM). Next, based on the projections from the original CT-slice, prior image and metal image, the sinogram is corrected in the traces affected by metal in the process called normalization and denormalization. Finally, the reconstructed image is obtained by FBP and a Nonlocal Means (NLM) filtering. The efficacy of the algorithm is evaluated by comparing five image quality metrics of the images and by inspecting regions of interest (ROI). Phantom data as well as clinical datasets are included. The proposed method is compared with three established metal artifact reduction (MAR) methods. The results from a phantom and clinical dataset show the visible reduction of artifacts. The conclusion is that IMIF-MAR method can reduce streak metal artifacts effectively and avoid new artifacts around metal implants, while preserving the anatomical structures. Considering both clinical and phantom studies, the proposed MAR algorithm improves the quality of clinical images affected by metal artifacts, and could be integrated in clinical setting.en_US
dc.identifier.issn2662-4737en_US
dc.identifier.urihttps://dspace.uclv.edu.cu/handle/123456789/13431
dc.language.isoen_USen_US
dc.relation.journalPhysical and Engineering Sciences in Medicineen_US
dc.source.endpage423en_US
dc.source.initialpage409en_US
dc.source.issue2en_US
dc.source.volume44en_US
dc.subjectMetal artifact reductionen_US
dc.subjectComputed tomographyen_US
dc.subjectImage qualityen_US
dc.subjectImplantsen_US
dc.titleInpainting‑filtering for metal artifact reduction (IMIF‑MAR) in computed tomographyen_US
dc.typeArticleen_US
dc.type.article1en_US

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