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Sökning: L773:1878 4046 OR L773:1076 6332 > (2015-2019) > Quantitative Measur...

  • Jensen, KristinOslo Univ Hosp, Dept Diagnost Phys, N-0454 Oslo, Norway.;Univ Oslo, Dept Phys, POB 1048 Blindern, N-0316 Oslo, Norway.;Oslo & Akershus Univ Coll Appl Sci, Dept Life Sci & Hlth, POB 4 St Olavs Plass, N-0130 Oslo, Norway.,Oslo Metropolitan University (författare)

Quantitative Measurements Versus Receiver Operating Characteristics and Visual Grading Regression in CT Images Reconstructed with Iterative Reconstruction : A Phantom Study

  • Artikel/kapitelEngelska2018

Förlag, utgivningsår, omfång ...

  • ELSEVIER SCIENCE INC,2018
  • printrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:DiVA.org:kth-227780
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-227780URI
  • https://doi.org/10.1016/j.acra.2017.10.020DOI
  • https://lup.lub.lu.se/record/4fdaf15e-6bf1-4aca-a443-7dfaafff49e8URI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:ref swepub-contenttype
  • Ämneskategori:art swepub-publicationtype

Anmärkningar

  • QC 20180514
  • Rationale and Objectives: This study aimed to evaluate the correlation of quantitative measurements with visual grading regression (VGR) and receiver operating characteristics (ROC) analysis in computed tomography (CT) images reconstructed with iterative reconstruction. Materials and Methods: CT scans on a liver phantom were performed on CT scanners from GE, Philips, and Toshiba at three dose levels. Images were reconstructed with filtered back projection (FBP) and hybrid iterative techniques (ASiR, iDose, and AIDR 3D of different strengths). Images were visually assessed by five readers using a four- and five-grade ordinal scale for liver low contrast lesions and for 10 image quality criteria. The results were analyzed with ROC and VGR. Standard deviation, signal-to-noise ratios, and contrast to-noise ratios were measured in the images. Results: All data were compared to FBP. The results of the quantitative measurements were improved for all algorithms. ROC analysis showed improved lesion detection with ASiR and AIDR and decreased lesion detection with iDose. VGR found improved noise properties for all algorithms, increased sharpness with iDose and AIDR, and decreased artifacts from the spine with AIDR, whereas iDose increased the artifacts from the spine. The contrast in the spine decreased with ASiR and iDose. Conclusions: Improved quantitative measurements in images reconstructed with iterative reconstruction compared to FBP are not equivalent to improved diagnostic image accuracy.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Andersen, Hilde KjernlieOslo Univ Hosp, Dept Diagnost Phys, N-0454 Oslo, Norway.,Oslo university hospital (författare)
  • Smedby, Örjan,1956-KTH Royal Institute of Technology,KTH,Medicinsk avbildning(Swepub:kth)u1vc2uzb (författare)
  • Osteras, Bjorn HelgeOslo Univ Hosp, Dept Diagnost Phys, N-0454 Oslo, Norway.;Univ Oslo, Inst Clin Med, Oslo, Norway.,University of Oslo (författare)
  • Aarsnes, AnetteOslo Univ Hosp, Dept Diagnost Phys, N-0454 Oslo, Norway.,Oslo university hospital (författare)
  • Tingberg, AndersLund University,Lunds universitet,Medicinsk strålningsfysik, Malmö,Forskargrupper vid Lunds universitet,Medical Radiation Physics, Malmö,Lund University Research Groups,Skåne University Hospital(Swepub:lu)rfa-ati (författare)
  • Fosse, ErikUniv Oslo, Inst Clin Med, Oslo, Norway.;Natl Hosp Norway, Intervent Ctr, Oslo, Norway.,University of Oslo (författare)
  • Martinsen, Anne CatrineOslo Univ Hosp, Dept Diagnost Phys, N-0454 Oslo, Norway.;Univ Oslo, Dept Phys, POB 1048 Blindern, N-0316 Oslo, Norway.,University of Oslo (författare)
  • Oslo Univ Hosp, Dept Diagnost Phys, N-0454 Oslo, Norway.;Univ Oslo, Dept Phys, POB 1048 Blindern, N-0316 Oslo, Norway.;Oslo & Akershus Univ Coll Appl Sci, Dept Life Sci & Hlth, POB 4 St Olavs Plass, N-0130 Oslo, Norway.Oslo Metropolitan University (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:Academic Radiology: ELSEVIER SCIENCE INC25:4, s. 509-5181076-63321878-4046

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