dc.contributor.author | Kakkos, Stavros K. | en |
dc.contributor.author | Nicolaïdes, Andrew N. | en |
dc.contributor.author | Kyriacou, Efthyvoulos C. | en |
dc.contributor.author | Pattichis, Constantinos S. | en |
dc.contributor.author | Geroulakos, George | en |
dc.creator | Kakkos, Stavros K. | en |
dc.creator | Nicolaïdes, Andrew N. | en |
dc.creator | Kyriacou, Efthyvoulos C. | en |
dc.creator | Pattichis, Constantinos S. | en |
dc.creator | Geroulakos, George | en |
dc.date.accessioned | 2019-11-13T10:40:31Z | |
dc.date.available | 2019-11-13T10:40:31Z | |
dc.date.issued | 2006 | |
dc.identifier.issn | 1476-7120 | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/54161 | |
dc.description.abstract | Background: Unstable carotid plaques on subjective, visual, assessment using B-mode ultrasound scanning appear as echolucent and heterogeneous. Although previous studies on computer assisted plaque characterisation have standardised B-mode images for brightness, improving the objective assessment of echolucency, little progress has been made towards standardisation of texture analysis methods, which assess plaque heterogeneity. The aim of the present study was to investigate the influence of image zooming during ultrasound scanning on textural features and to test whether or not resolution standardisation decreases the variability introduced. Methods: Eighteen still B-mode images of carotid plaques were zoomed during carotid scanning (zoom factor 1.3) and both images were transferred to a PC and normalised. Using bilinear and bicubic interpolation, the original images were interpolated in a process of simulating off-line zoom using the same interpolation factor. With the aid of the colour-coded image, carotid plaques of the original, zoomed and two resampled images for each case were outlined and histogram, first order and second order statistics were subsequently calculated. Results: Most second order statistics (21/25, 84%) were significantly (p < 0.05) sensitive to image zooming during scanning, in contrast to histogram and first order statistics (4/25, 16%, p < 0.001, Fisher's exact test). Median (interquartile range) change of those features sensitive to zooming was 18.14% (4.94-28.43). Image interpolation restored these changes, the bicubic interpolation being superior compared to bilinear interpolation (p = 0.036). Conclusion: Texture analysis of ultrasonic plaques should be performed under standardised resolution settings | en |
dc.description.abstract | otherwise a resolution normalisation algorithm should be applied. © 2006Kakkos et al | en |
dc.description.abstract | licensee BioMed Central Ltd. | en |
dc.source | Cardiovascular Ultrasound | en |
dc.source.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-33645451292&doi=10.1186%2f1476-7120-4-8&partnerID=40&md5=3cb0e9690c7e5488621bfebd9269770f | |
dc.subject | methodology | en |
dc.subject | article | en |
dc.subject | mathematical model | en |
dc.subject | Algorithms | en |
dc.subject | human | en |
dc.subject | Humans | en |
dc.subject | algorithm | en |
dc.subject | clinical trial | en |
dc.subject | multicenter study | en |
dc.subject | standardization | en |
dc.subject | statistical significance | en |
dc.subject | sensitivity analysis | en |
dc.subject | statistical analysis | en |
dc.subject | Reproducibility of Results | en |
dc.subject | ultrasound | en |
dc.subject | diagnostic value | en |
dc.subject | comparative study | en |
dc.subject | health care quality | en |
dc.subject | diagnostic accuracy | en |
dc.subject | sensitivity and specificity | en |
dc.subject | image analysis | en |
dc.subject | echography | en |
dc.subject | reproducibility | en |
dc.subject | image quality | en |
dc.subject | signal processing | en |
dc.subject | Signal Processing, Computer-Assisted | en |
dc.subject | carotid artery | en |
dc.subject | atherosclerotic plaque | en |
dc.subject | computer assisted diagnosis | en |
dc.subject | image enhancement | en |
dc.subject | Image Interpretation, Computer-Assisted | en |
dc.subject | carotid artery obstruction | en |
dc.subject | Carotid Stenosis | en |
dc.subject | B scan | en |
dc.subject | histogram | en |
dc.subject | microcomputer | en |
dc.subject | Quality Assurance, Health Care | en |
dc.title | Effect of zooming on texture features of ultrasonic images | en |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | 10.1186/1476-7120-4-8 | |
dc.description.volume | 4 | |
dc.author.faculty | 002 Σχολή Θετικών και Εφαρμοσμένων Επιστημών / Faculty of Pure and Applied Sciences | |
dc.author.department | Τμήμα Πληροφορικής / Department of Computer Science | |
dc.type.uhtype | Article | en |
dc.description.notes | <p>Cited By :10</p> | en |
dc.source.abbreviation | Cardiovasc.Ultrasound | en |
dc.contributor.orcid | Pattichis, Constantinos S. [0000-0003-1271-8151] | |
dc.contributor.orcid | Kyriacou, Efthyvoulos C. [0000-0002-4589-519X] | |
dc.gnosis.orcid | 0000-0003-1271-8151 | |
dc.gnosis.orcid | 0000-0002-4589-519X | |