Quality and dose optimization in hand computed radiography

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dc.contributor.authorPavan, A. L. M. [UNESP]
dc.contributor.authorAlves, A. F. F. [UNESP]
dc.contributor.authorDuarte, S. B.
dc.contributor.authorGiacomini, G. [UNESP]
dc.contributor.authorSardenberg, T. [UNESP]
dc.contributor.authorMiranda, J. R. A. [UNESP]
dc.contributor.authorPina, D. R. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionCentro Brasileiro de Pesquisas Físicas (CBPF)
dc.date.accessioned2015-12-07T15:32:47Z
dc.date.available2015-12-07T15:32:47Z
dc.date.issued2015
dc.description.abstractThe objective of the present study was to optimize a radiographic technique for hand examinations using a computed radiography (CR) system and demonstrate the potential for dose reductions compared with clinically established technique. An exposure index was generated from the optimized technique to guide operators when imaging hands. Homogeneous and anthropomorphic phantoms that simulated a patient's hand were imaged using a CR system at various tube voltages and current settings (40-55 kVp, 1.25-2.8 mAs), including those used in clinical routines (50 kVp, 2.0 mAs) to obtain an optimized chart. The homogeneous phantom was used to assess objective parameters that are associated with image quality, including the signal difference-to-noise ratio (SdNR), which is used to define a figure of merit (FOM) in the optimization process. The anthropomorphic phantom was used to subjectively evaluate image quality using Visual Grading Analysis (VGA) that was performed by three experienced radiologists. The technique that had the best VGA score and highest FOM was considered the gold standard (GS) in the present study. Image quality, dose and the exposure index that are currently used in the clinical routine for hand examinations in our institution were compared with the GS technique. The effective dose reduction was 67.0%. Good image quality was obtained for both techniques, although the exposure indices were 1.60 and 2.39 for the GS and clinical routine, respectively.en
dc.description.affiliationDept of Physics and Biophysics, Biosciences Institute of Botucatu, São Paulo State University, Distrito de Rubião Junior S/N, Botucatu, São Paulo 18618-000, Brazil
dc.description.affiliationBrasilian Center of Physics Research -CBPF-MCT, Rio de Janeiro 22290-180, Brazil
dc.description.affiliationDept of Physics and Biophysics, Biosciences Institute of Botucatu, São Paulo State University, Distrito de Rubião Junior S/N, Botucatu, São Paulo 18618-000, Brazil
dc.description.affiliationDept of Orthopedics and Traumatology, Botucatu Medical School, São Paulo State University, Distrito de Rubião Junior S/N, Botucatu, São Paulo 18618-000, Brazil
dc.description.affiliationDept of Tropical Diseases and Diagnostic Imaging, Botucatu Medical School, Univ Estadual Paulista, Distrito de Rubião Junior S/N, Botucatu, São Paulo 18618-000, Brazil
dc.description.affiliationUnespDept of Physics and Biophysics, Biosciences Institute of Botucatu, São Paulo State University, Distrito de Rubião Junior S/N, Botucatu, São Paulo 18618-000, Brazil
dc.description.affiliationUnespDept of Orthopedics and Traumatology, Botucatu Medical School, São Paulo State University, Distrito de Rubião Junior S/N, Botucatu, São Paulo 18618-000, Brazil
dc.description.affiliationUnespDept of Physics and Biophysics, Biosciences Institute of Botucatu, São Paulo State University, Distrito de Rubião Junior S/N, Botucatu, São Paulo 18618-000, Brazil
dc.description.affiliationUnespDept of Tropical Diseases and Diagnostic Imaging, Botucatu Medical School, Univ Estadual Paulista, Distrito de Rubião Junior S/N, Botucatu, São Paulo 18618-000, Brazil
dc.format.extent1-5
dc.identifierhttp://dx.doi.org/10.1016/j.ejmp.2015.06.010
dc.identifier.citationPhysica Medica : Pm : An International Journal Devoted To The Applications Of Physics To Medicine And Biology : Official Journal Of The Italian Association Of Biomedical Physics (aifb), p. 1-5, 2015.
dc.identifier.doi10.1016/j.ejmp.2015.06.010
dc.identifier.issn1724-191X
dc.identifier.pubmed26148866
dc.identifier.urihttp://hdl.handle.net/11449/131224
dc.language.isoeng
dc.publisherElsevier B. V.
dc.relation.ispartofPhysica Medica : Pm : An International Journal Devoted To The Applications Of Physics To Medicine And Biology : Official Journal Of The Italian Association Of Biomedical Physics (aifb)
dc.rights.accessRightsAcesso restrito
dc.sourcePubMed
dc.subjectFigure of meriten
dc.subjectImage optimizationen
dc.subjectPhantomen
dc.subjectVisual grading analysisen
dc.titleQuality and dose optimization in hand computed radiographyen
dc.typeArtigo
dcterms.rightsHolderElsevier B. V.
unesp.author.orcid0000-0002-8306-8056[6]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Botucatupt
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Medicina, Botucatupt

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Artigos - Física e Biofísica - IBB
Artigos - Cirurgia e Ortopedia - FMB
Artigos - Doenças Tropicais e Diagnósticos por Imagem - FMB