2/18/2023 0 Comments Beam hardening artifact meaning![]() ![]() The results of a phantom model experiment and four patient data experiments show that the proposed method can effectively remove beam hardening artifacts and improve image accuracy. Finally, an artifact-free image was reconstructed from the corrected projection data. Next, erroneous projection was identified and removed from the image. Considering the equivalent tissue length as the independent variable, a projection model was constructed and the correction coefficients were computed. Then, the equivalent tissues were projected to obtain their lengths in different ray directions. ![]() Firstly, the image pixels were divided into different equivalent tissues based on their CT values. Therefore, herein, we adopt a reconstruction algorithm based on the equivalent tissue length approach. Reconstructed images may include several hardening artifacts, which weaken the image quality and affect diagnosis. This study aims to investigate a post-construction method that can correct hardening artifacts in computed tomography (CT) images without measuring the X-ray spectrum. SNIP takes into account characteristics of the source's subject field, which is the set of documents citing that source. It helps you make a direct comparison of sources in different subject fields. SNIP measures a source’s contextual citation impact by weighting citations based on the total number of citations in a subject field. Source Normalized Impact per Paper (SNIP) 2021: 0.943 ℹ Source Normalized Impact per Paper (SNIP): SJR is a measure of scientific influence of journals that accounts for both the number of citations received by a journal and the importance or prestige of the journals where such citations come from It measures the scientific influence of the average article in a journal, it expresses how central to the global scientific discussion an average article of the journal is. ![]() It is based on the idea that 'all citations are not created equal'. The SJR is a size-independent prestige indicator that ranks journals by their 'average prestige per article'. SCImago Journal Rank (SJR) 2021: 0.337 ℹ SCImago Journal Rank (SJR): The Journal Impact Factor is the average number of times articles from the journal published in the past two years have been cited in the Journal Citation Reports year.ĬiteScore is the number of citations received by a journal in one year to documents published in the three previous years, divided by the number of documents indexed in Scopus published in those same three years. The Impact Factor itself is based only on Web of Science Core Collection citation data from the last three years and thus reflects only recent impact. This is calculated differently from the Journal Impact Factor, so it is not simply an average of the Impact Factors in the time period. Thus, the impact factor of a journal is calculated by dividing the number of current year citations to the source items published in that journal during the previous two years.ĥ-Year Impact Factor: 1.944 ℹ 5-Year Impact Factor:Ī 5-Year Impact Factor shows the long-term citation trend for a journal. The annual JCR impact factor is a ratio between citations and recent citable items published. The impact factor is one of these it is a measure of the frequency with which the “average article” in a journal has been cited in a particular year or period. The JCR provides quantitative tools for ranking, evaluating, categorizing, and comparing journals. CBCT manufacturing companies continue to develop computer metal artifact reduction algorithms to reduce the number of artifacts visualized in a CBCT data volume.Impact Factor (JCR) 2021: 2.299 ℹ Impact Factor (JCR): Placing cotton rolls between the arches during the acquisition may also be appropriate to decrease the beam hardening artifact from opposing arch restorations. 1 To limit artifacts, reduction of the FOV may avoid inclusion of metallic restorations. Beam hardening artifacts reduce the image quality in the axial plane it presents as white streaks and black bands. Due to the high density of these materials, it creates an area of undersampling where information cannot be recorded. Metallic restorations or objects, orthodontic appliances, and endodontic materials are the main cause of beam hardening in CBCT data volumes. The most common artifacts are beam hardening artifacts. It is important that the clinician knows how to differentiate these artifacts to avoid misinterpretation. 13 There are several types of artifacts that may interfere with the image quality. An artifact is described as any image distortion that is not related to the patient’s anatomical structures. ![]()
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