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A novel method for comparing radiation dose and image quality, between and within different x-ray units in a series of hospitals

2018-12Journal article Restricted access
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dc.contributor.authorAl-Murshedi, Sadeq
dc.contributor.authorHogg, Peter
dc.contributor.authorLança, Luís
dc.contributor.authorEngland, Andrew
dc.date.accessioned2019-01-01T17:42:09Z
dc.date.available2019-01-01T17:42:09Z
dc.date.issued2018-12
dc.description.abstractObjectives - To develop a novel method for comparing radiation dose and image quality (IQ) to evaluate adult chest x-ray (CXR) imaging among several hospitals. Methods - CDRAD 2.0 phantom was used to acquire images in eight hospitals (17 digital x-ray units) using local adult CXR protocols. IQ was represented by image quality figure inverse (IQFinv), measured using CDRAD analyser software. Signal to noise ratio, contrast to noise ratio and conspicuity index were calculated as additional measures of IQ. Incident air kerma (IAK) was measured using a solid-state dosimeter for each acquisition. Figure of merit (FOM) was calculated to provide a single estimation of IQ and radiation dose. Results - IQ, radiation dose and FOM varied considerably between hospitals and x-ray units. For IQFinv, the mean (range) between and within the hospitals were 1.42 (0.83-2.18) and 1.87 (1.52-2.18), respectively. For IAK, the mean (range) between and within the hospitals were 93.56 (17.26-239.15) μGy and 180.85 (122.58-239.15) μGy, respectively. For FOM, the mean (range) between and within hospitals were 0.05 (0.01-0.14) and 0.03 (0.02-0.05), respectively. Concluysions - The suggested method for comparing IQ and dose using FOM concept along with the new proposed FOM, is a valid, reliable and effective approach for monitoring and comparing IQ and dose between and within hospitals. It is also can be beneficial for the optimisation of x-ray units in clinical practice. Further optimisation for the hospitals/x-ray units with low FOM are required to minimise radiation dose without degrading IQ.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationAl-Murshedi S, Hogg P, Lança L, England A. A novel method for comparing radiation dose and image quality, between and within different X-ray units in a series of hospitals. J Radiol Prot. 2018;38(4):1344-58.pt_PT
dc.identifier.doi10.1088/1361-6498/aae3fapt_PT
dc.identifier.urihttp://hdl.handle.net/10400.21/9238
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherIOP Publishingpt_PT
dc.relation.publisherversionhttp://iopscience.iop.org/article/10.1088/1361-6498/aae3fa/metapt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectRadiologypt_PT
dc.subjectDosimetrypt_PT
dc.subjectImage qualitypt_PT
dc.subjectChest x-raypt_PT
dc.subjectHospitalpt_PT
dc.titleA novel method for comparing radiation dose and image quality, between and within different x-ray units in a series of hospitalspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage1358pt_PT
oaire.citation.issue4pt_PT
oaire.citation.startPage1344pt_PT
oaire.citation.titleJournal of Radiological Protectionpt_PT
oaire.citation.volume38pt_PT
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT

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