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Dual-energy CT: a phantom comparison of different platforms for abdominal imaging.
Sellerer, Thorsten; Noël, Peter B; Patino, Manuel; Parakh, Anushri; Ehn, Sebastian; Zeiter, Sascha; Holz, Jasmin A; Hammel, Johannes; Fingerle, Alexander A; Pfeiffer, Franz; Maintz, David; Rummeny, Ernst J; Muenzel, Daniela; Sahani, Dushyant V.
Afiliação
  • Sellerer T; Chair for Biomedical Physics, Department of Physics and Munich School of BioEngineering, Technical University of Munich, James-Franck-Str. 1, 85748, Garching, Germany. thorsten.sellerer@tum.de.
  • Noël PB; Chair for Biomedical Physics, Department of Physics and Munich School of BioEngineering, Technical University of Munich, James-Franck-Str. 1, 85748, Garching, Germany.
  • Patino M; Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany.
  • Parakh A; Division of Abdominal Imaging, Department of Radiology, Massachusetts General Hospital, Boston, MA, USA.
  • Ehn S; Division of Abdominal Imaging, Department of Radiology, Massachusetts General Hospital, Boston, MA, USA.
  • Zeiter S; Chair for Biomedical Physics, Department of Physics and Munich School of BioEngineering, Technical University of Munich, James-Franck-Str. 1, 85748, Garching, Germany.
  • Holz JA; Institute of Diagnostic and Interventional Radiology, University Hospital of Cologne, Cologne, Germany.
  • Hammel J; Institute of Diagnostic and Interventional Radiology, University Hospital of Cologne, Cologne, Germany.
  • Fingerle AA; Chair for Biomedical Physics, Department of Physics and Munich School of BioEngineering, Technical University of Munich, James-Franck-Str. 1, 85748, Garching, Germany.
  • Pfeiffer F; Chair for Biomedical Physics, Department of Physics and Munich School of BioEngineering, Technical University of Munich, James-Franck-Str. 1, 85748, Garching, Germany.
  • Maintz D; Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany.
  • Rummeny EJ; Chair for Biomedical Physics, Department of Physics and Munich School of BioEngineering, Technical University of Munich, James-Franck-Str. 1, 85748, Garching, Germany.
  • Muenzel D; Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany.
  • Sahani DV; Institute for Advanced Study, Technical University of Munich, Garching, Germany.
Eur Radiol ; 28(7): 2745-2755, 2018 Jul.
Article em En | MEDLINE | ID: mdl-29404773
OBJECTIVES: Evaluation of imaging performance across dual-energy CT (DECT) platforms, including dual-layer CT (DLCT), rapid-kVp-switching CT (KVSCT) and dual-source CT (DSCT). METHODS: A semi-anthropomorphic abdomen phantom was imaged on these DECT systems. Scans were repeated three times for CTDIvol levels of 10 mGy, 20 mGy, 30 mGy and different fat-simulating extension rings. Over the available range of virtual-monoenergetic images (VMI), noise as well as quantitative accuracy of hounsfield units (HU) and iodine concentrations were evaluated. RESULTS: For all VMI levels, HU values could be determined with high accuracy compared to theoretical values. For KVSCT and DSCT, a noise increase was observed towards lower VMI levels. A patient-size dependent increase in the uncertainty of quantitative iodine concentrations is observed for all platforms. For a medium patient size the iodine concentration root-mean-square deviation at 20 mGy is 0.17 mg/ml (DLCT), 0.30 mg/ml (KVSCT) and 0.77mg/ml (DSCT). CONCLUSION: Noticeable performance differences are observed between investigated DECT systems. Iodine concentrations and VMI HUs are accurately determined across all DECT systems. KVSCT and DLCT deliver slightly more accurate iodine concentration values than DSCT for investigated scenarios. In DLCT, low-noise and high-image contrast at low VMI levels may help to increase diagnostic information in abdominal CT. KEY POINTS: • Current dual-energy CT platforms provide accurate, reliable quantitative information. • Dual-energy CT cross-platform evaluation revealed noticeable performance differences between different systems. • Dual-layer CT offers constant noise levels over the complete energy range.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Radiografia Abdominal / Tomografia Computadorizada por Raios X / Imagem Radiográfica a Partir de Emissão de Duplo Fóton / Imagens de Fantasmas Tipo de estudo: Evaluation_studies Limite: Humans Idioma: En Ano de publicação: 2018 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Radiografia Abdominal / Tomografia Computadorizada por Raios X / Imagem Radiográfica a Partir de Emissão de Duplo Fóton / Imagens de Fantasmas Tipo de estudo: Evaluation_studies Limite: Humans Idioma: En Ano de publicação: 2018 Tipo de documento: Article