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10 kVp rule - An anthropomorphic pelvis phantom imaging study using a CR system: impact on image quality and effective dose using AEC and manual mode

2014-03Conference object Open access
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dc.contributor.authorLança, Luís
dc.contributor.authorFranco, L.
dc.contributor.authorAhmed, A.
dc.contributor.authorHarderwijk, M.
dc.contributor.authorNasir, S.
dc.contributor.authorNdlovu, J.
dc.contributor.authorOliveira, M.
dc.contributor.authorSantiago, A.
dc.contributor.authorHogg, Peter
dc.date.accessioned2016-01-13T17:17:50Z
dc.date.available2016-01-13T17:17:50Z
dc.date.issued2014-03
dc.description.abstractPurpose: This study aims to investigate the influence of tube potential (kVp) variation in relation to perceptual image quality and effective dose for pelvis using automatic exposure control (AEC) and non-AEC in a computed radiography (CR) system. Methods and Materials: To determine the effects of using AEC and non-AEC by applying the 10 kVp rule in two experiments using an anthropomorphic pelvis phantom. Images were acquired using 10 kVp increments (60-120 kVp) for both experiments. The first experiment, based on seven AEC combinations, produced 49 images. The mean mAs from each kVp increment were used as a baseline for the second experiment producing 35 images. A total of 84 images were produced and a panel of 5 experienced observers participated for the image scoring using the 2 AFC visual grading software. PCXMC software was used to estimate the effective dose. Results: A decrease in perceptual image quality as the kVp increases was observed both in non-AEC and AEC experiments, however no significant statistical differences (p> 0.05) were found. Image quality scores from all observers at 10 kVp increments for all mAs values using non-AEC mode demonstrates a better score up to 90 kVp. Effective dose results show a statistical significant decrease (p=0.000) on the 75th quartile from 0.3 mSv at 60 kVp to 0.1 mSv at 120 kVp when applying the 10 kVp rule in non-AEC mode. Conclusion: No significant reduction in perceptual image quality is observed when increasing kVp whilst a marked and significant effective dose reduction is observed.pt_PT
dc.identifier.citationLança L, Franco L, Ahmed A, Harderwijk M, Marti C, Nasir S, et al. 10 kVp rule – An anthropomorphic pelvis phantom imaging study using a CR system: impact on image quality and effective dose using AEC and manual mode. In European Congress of Radiology, Vienna (Austria), 6th to 10th March 2014. Insights Imaging. 2014;5(1 Suppl):S165.pt_PT
dc.identifier.doi10.1007/s13244-014-0317-5pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.21/5539
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSpringerpt_PT
dc.relation.publisherversionhttp://link.springer.com/article/10.1007/s13244-014-0317-5pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/pt_PT
dc.subjectRadiologypt_PT
dc.subjectPelvis phantompt_PT
dc.subjectEffective dosept_PT
dc.subjectAECpt_PT
dc.title10 kVp rule - An anthropomorphic pelvis phantom imaging study using a CR system: impact on image quality and effective dose using AEC and manual modept_PT
dc.typeconference object
dspace.entity.typePublication
oaire.citation.endPageS165pt_PT
oaire.citation.startPageS165pt_PT
oaire.citation.titleInsights Imagingpt_PT
oaire.citation.volume5pt_PT
rcaap.rightsopenAccesspt_PT
rcaap.typeconferenceObjectpt_PT

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