Evaluation of streak metal artifacts in cone beam computed tomography by using the Gumbel distribution: a phantom study

Nomura, Yuta; Watanabe, Hiroshi; Manila, Nisha Gowri; Asai, Sakurako; Kurabayashi, Tohru

doi:10.1016/j.oooo.2020.08.031

Cited by 5 publications

(2 citation statements)

References 20 publications

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“…Additionally, when performing a CBCT scan of the printed model, a higher blooming effect was noticed around the implants compared to implants placed in the patient, which could also affect the implant matching procedure. Presently, no clinical evidence exists which relates to the optimal CBCT scanning settings for reducing the influence of metal artifacts [38].…”

Section: Discussionmentioning

confidence: 99%

In Vivo and In Vitro Accuracy Analysis of Static Computer-Assisted Implant Surgery in an Edentulous Patient

Макаров

Papi²,

Santomauro³

et al. 2023

Applied Sciences

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Background: Recently, intraoral scanning (IOS) has been proposed as a new tool to evaluate the accuracy of static computer-assisted implant surgery (s-CAIS); however, further research is needed to improve the precision of IOS for full-arch impressions. The purpose of the study was to assess the accuracy of s-CAIS in an edentulous patient either in vivo or in vitro with two different evaluation techniques and to investigate if their results are comparable. Methods: A patient with terminal dentition was selected and four implants were placed using s-CAIS with a bone-supported stackable template. Segmentation used for designing a template was 3D printed, and then four implants were placed in the model following the same protocol as for s-CAIS. The model then underwent cone beam computed tomography (CBCT) and laboratory scanning to evaluate its accuracy. Data were uploaded to specific software, and accuracy values were automatically generated. Results: A statistical analysis was not attempted since all measurements were performed on the same patient and model. When descriptively comparing the accuracy of the two methods of treatment evaluation in the in vitro scenario, comparable results were obtained between IOS and CBCT, except for the angle. Conclusions: As the intraoral scanning procedure in fully edentulous patients is not yet clinically validated, utilizing CBCT can still be recommended for the accurate evaluation of computer-assisted implant placement.

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Section: Discussionmentioning

confidence: 99%

In Vivo and In Vitro Accuracy Analysis of Static Computer-Assisted Implant Surgery in an Edentulous Patient

Макаров

Papi²,

Santomauro³

et al. 2023

Applied Sciences

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“…Li et al [16] Mitral valve reparation (CT-US a ) Müller et al [17] Human breathing model for detecting irregularities (CT) Lyu et al [18] Liver segmentation (CT) Nomura et al [19] Streak artifact assessment (Cone Beam-CT) Dossing et al [20] Identification of crystals embedded in a phantom (Dual Energy-CT)…”

Section: Referencesmentioning

confidence: 99%

Description and Use of Three-Dimensional Numerical Phantoms of Cardiac Computed Tomography Images

Vera

Bravo

Medina

2022

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The World Health Organization indicates the top cause of death is heart disease. These diseases can be detected using several imaging modalities, especially cardiac computed tomography (CT), whose images have imperfections associated with noise and certain artifacts. To minimize the impact of these imperfections on the quality of the CT images, several researchers have developed digital image processing techniques (DPIT) by which the quality is evaluated considering several metrics and databases (DB), both real and simulated. This article describes the processes that made it possible to generate and utilize six three-dimensional synthetic cardiac DBs or voxels-based numerical phantoms. An exhaustive analysis of the most relevant features of images of the left ventricle, belonging to a real CT DB of the human heart, was performed. These features are recreated in the synthetic DBs, generating a reference phantom or ground truth free of imperfections (DB1) and five phantoms, in which Poisson noise (DB2), stair-step artifact (DB3), streak artifact (DB4), both artifacts (DB5) and all imperfections (DB6) are incorporated. These DBs can be used to determine the performance of DPIT, aimed at decreasing the effect of these imperfections on the quality of cardiac images.

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Gumbel distribution-based technique enables quantitative comparison between streak metal artifacts of multidetector row CT and cone-beam CT: a phantom study

et al. 2023

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Evaluation of streak metal artifacts in cone beam computed tomography by using the Gumbel distribution: a phantom study

Cited by 5 publications

References 20 publications

In Vivo and In Vitro Accuracy Analysis of Static Computer-Assisted Implant Surgery in an Edentulous Patient

In Vivo and In Vitro Accuracy Analysis of Static Computer-Assisted Implant Surgery in an Edentulous Patient

Description and Use of Three-Dimensional Numerical Phantoms of Cardiac Computed Tomography Images

Gumbel distribution-based technique enables quantitative comparison between streak metal artifacts of multidetector row CT and cone-beam CT: a phantom study

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