Relationship between the visual evaluation of pathology visibility and the physical measure of low contrast detail detectability in neonatal chest radiography |
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| Affiliation: | 1. AL-Zahraa University for Women, College of Health and Medical Technology, Karbala, Iraq;2. Collage of Medical Technology, Misurata, Libya;3. Department of Medical Imaging, Faculty of Applied Health Science, The Hashemite University, P.O. Box 330127, Zarqa, 13133, Jordan;4. City University of London, UK;5. School of Medicine, University College Cork, Ireland;1. Medical Diagnostic Imaging Department, College of Health Sciences, University of Sharjah, Sharjah, United Arab Emirates;2. Radiology Department, NHS Greater Glasgow and Clyde, Scotland, UK;3. Diagnostic Radiography and Imaging, School of Health Sciences, University of Ulster, Ireland;1. Walsall Healthcare NHS Trust, UK;2. University of Salford, UK;3. University Hospitals of Morecambe Bay NHS Foundation Trust, UK |
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| Abstract: | IntroductionThe detectability of low contrast detail (LCD) is a method used to assess image quality (IQ) in neonatal radiography; however, there is a lack of data on the relationship between LCD detectability and visual IQ. The study aims at investigating the relationship between the LCD detectability and visual IQ and pathology visibility (PV).MethodsSeveral acquisition parameters were employed to obtain a group of images from a neonatal Gammex chest phantom. Three observers applied relative visual grading analysis (VGA) for assessing the IQ and PV. A simulated pneumothorax visibility (PNV) and simulated hyaline membrane disease visibility (HMV) represented PV. Next, a CDRAD 2.0 phantom was radiographed utilising the same acquisition protocols, and several paired images were obtained. With the use of CDRAD analyser software, the detectability of LCD was assessed and expressed by an image quality figure inverse (IQFiinv) metric. The correlation between the IQFinv and each of IQ, PNV and HMV was examined.ResultsThe physical measure (IQFinv) and the visual assessment of IQ were shown to be strongly correlated (r = 0.95; p < 0.001). Using Pearson's correlation, the IQFinv, PNV, and HMV were found to be strongly correlated (r = 0.94; p < 0.001) and (r = 0.92; p < 0.001), correspondingly.ConclusionResults of the study show that physical measures of LCD detectability utilising the CDRAD 2.0 phantom is strongly corelated with visual IQ and PV (PNV and HMV) and can be used to evaluate IQ when undertaking neonatal chest radiography (CXR).Implications for practiceThis study establishes the feasibility of utilising the physical measure (IQFinv) and the CDRAD 2.0 phantom in routine quality assurance and neonatal CXR optimisation studies. |
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| Keywords: | CDRAD 2.0 phantom Neonatal CXR Low contrast detail detectability Physical and visual image quality evaluation |
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