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Quantitative Measur...
Quantitative Measurements Versus Receiver Operating Characteristics and Visual Grading Regression in CT Images Reconstructed with Iterative Reconstruction : A Phantom Study
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- Jensen, Kristin (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
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- Andersen, Hilde Kjernlie (författare)
- Oslo Univ Hosp, Dept Diagnost Phys, N-0454 Oslo, Norway.,Oslo university hospital
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- Smedby, Örjan, 1956- (författare)
- KTH Royal Institute of Technology,KTH,Medicinsk avbildning
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- Osteras, Bjorn Helge (författare)
- Oslo Univ Hosp, Dept Diagnost Phys, N-0454 Oslo, Norway.;Univ Oslo, Inst Clin Med, Oslo, Norway.,University of Oslo
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- Aarsnes, Anette (författare)
- Oslo Univ Hosp, Dept Diagnost Phys, N-0454 Oslo, Norway.,Oslo university hospital
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- Tingberg, Anders (författare)
- Lund University,Lunds universitet,Medicinsk strålningsfysik, Malmö,Forskargrupper vid Lunds universitet,Medical Radiation Physics, Malmö,Lund University Research Groups,Skåne University Hospital
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- Fosse, Erik (författare)
- Univ Oslo, Inst Clin Med, Oslo, Norway.;Natl Hosp Norway, Intervent Ctr, Oslo, Norway.,University of Oslo
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- Martinsen, Anne Catrine (författare)
- Oslo Univ Hosp, Dept Diagnost Phys, N-0454 Oslo, Norway.;Univ Oslo, Dept Phys, POB 1048 Blindern, N-0316 Oslo, Norway.,University of Oslo
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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)
- ELSEVIER SCIENCE INC, 2018
- 2018
- Engelska.
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Ingår i: Academic Radiology. - : ELSEVIER SCIENCE INC. - 1076-6332 .- 1878-4046. ; 25:4, s. 509-518
- Relaterad länk:
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http://dx.doi.org/10...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://lup.lub.lu.s...
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Abstract
Ämnesord
Stäng
- 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
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Radiologi och bildbehandling (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Radiology, Nuclear Medicine and Medical Imaging (hsv//eng)
Nyckelord
- CT iterative reconstruction
- quantitative measurements
- visual grading regression
- receiver operating characteristics
- diagnostic accuracy
- CT iterative reconstruction
- Diagnostic accuracy
- Quantitative measurements
- Receiver operating characteristics
- Visual grading regression
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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