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Visual grading regression: analysing data from visual grading experiments with regression models
Linköping University, Center for Medical Image Science and Visualization, CMIV. Linköping University, Department of Medicine and Health Sciences, Radiology . Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Centre for Medical Imaging, Department of Radiology in Linköping.ORCID iD: 0000-0002-7750-1917
Linköping University, Department of Clinical and Experimental Medicine, Occupational and Environmental Medicine . Linköping University, Faculty of Health Sciences.
2010 (English)In: British Journal of Radiology, ISSN 0007-1285, E-ISSN 1748-880X, Vol. 83, no 993, 767-775 p.Article in journal (Refereed) Published
Abstract [en]

For visual grading experiments, which are an easy and increasingly popular way of studying image quality, hitherto used data analysis methods are often inadequate. Visual grading analysis makes assumptions that are not statistically appropriate for ordinal data, and visual grading characteristic curves are difficult to apply in more complex experimental designs. The approach proposed in this paper, visual grading regression (VGR), consists of an established statistical technique, ordinal logistic regression, applied to data from single-image and image-pair experiments with visual grading scores selected on an ordinal scale. The approach is applicable for situations in which, for example, the effects of the choice of imaging equipment and post-processing method are to be studied simultaneously, while controlling for potentially confounding variables such as patient and observer identity. The analysis can be performed with standard statistical software packages using straightforward coding of the data. We conclude that the proposed statistical technique is useful in a wide range of visual grading studies.

Place, publisher, year, edition, pages
2010. Vol. 83, no 993, 767-775 p.
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:liu:diva-58796DOI: 10.1259/bjr/35254923ISI: 000281252800012PubMedID: 20223912OAI: oai:DiVA.org:liu-58796DiVA: diva2:345784
Note
Original Publication: Örjan Smedby and Mats Fredrikson, Visual grading regression: analysing data from visual grading experiments with regression models, 2010, British Journal of Radiology, (83), 993, 767-775. http://dx.doi.org/10.1259/bjr/35254923 Copyright: Brit Institute of Radiology http://www.bir.org.uk/ Available from: 2010-08-27 Created: 2010-08-27 Last updated: 2017-12-12

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Center for Medical Image Science and Visualization, CMIVRadiology Faculty of Health SciencesDepartment of Radiology in LinköpingOccupational and Environmental Medicine
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