Myocardial extracellular volume quantification in cardiac CT: comparison of the effects of two different iterative reconstruction algorithms with MRI as a reference standard.
Objectives: To compare the effects of hybrid iterative reconstruction (HIR) and model-based iterative reconstruction (MBIR) that incorporates a beam-hardening model for myocardial extracellular volume (ECV) quantification by cardiac CT using MRI as a reference standard.Methods: In this retrospective...
| Publicado en: | European Radiology Vol. 30; no. 2; pp. 691 - 702 |
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| Autores principales: | , , , , , , , , , , , , , |
| Formato: | research Journal Article |
| Publicado: |
Springer Nature
Feb2020
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=141192312&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 141192312 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 09387994 NPH jtl: European Radiology issn: 09387994 maglogo: N pubinfo: dt: Feb2020 vid: 30 iid: 2 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 141192312 141192312 NLM31471751 141192312 10.1007/s00330-019-06418-y NLM31471751 141192312 ppf: 691 ppct: 11 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: Myocardial extracellular volume quantification in cardiac CT: comparison of the effects of two different iterative reconstruction algorithms with MRI as a reference standard. aug: au: Emoto, Takafumi Kidoh, Masafumi Oda, Seitaro Nakaura, Takeshi Nagayama, Yasunori Sasao, Akira Funama, Yoshinori Araki, Satoshi Takashio, Seiji Sakamoto, Kenji Yamamoto, Eiichiro Kaikita, Koichi Tsujita, Kenichi Yamashita, Yasuyuki affil: Department of Central Radiology, Kumamoto University Hospital, 1-1-1 Honjyo, Chuo-ku, 860-8556, Kumamoto, Japan sug: subj: Algorithms Tomography, X-Ray Computed Methods Magnetic Resonance Imaging Heart Diseases Radiographic Image Interpretation, Computer-Assisted Methods Heart Myocardium Pathology Heart Diseases Pathology Retrospective Design Human Male Middle Age Body Weights and Measures Female Validation Studies Comparative Studies Evaluation Research Multicenter Studies Scales Middle Aged: 45-64 years Male Female ab: Objectives: To compare the effects of hybrid iterative reconstruction (HIR) and model-based iterative reconstruction (MBIR) that incorporates a beam-hardening model for myocardial extracellular volume (ECV) quantification by cardiac CT using MRI as a reference standard.Methods: In this retrospective study, a total of 34 patients were evaluated using cardiac CT and MRI. Paired CT image sets were created using HIR and MBIR with a beam-hardening model. We calculated mean absolute differences and correlations between the global mid-ventricular ECV derived from CT and MRI via Pearson correlation analysis. In addition, we performed qualitative analysis of image noise and beam-hardening artifacts on postcontrast images using a four-point scale: 1 = extensive, 2 = strong, 3 = mild, and 4 = minimal.Results: The mean absolute difference between the ECV derived from CT and MRI for MBIR was significantly smaller than that for HIR (MBIR 3.74 ± 3.59%; HIR 4.95 ± 3.48%, p = 0.034). MBIR improved the correlation between the ECV derived from CT and MRI when compared with HIR (MBIR, r = 0.60, p < 0.001; HIR, r = 0.47, p = 0.006). In qualitative analysis, MBIR significantly reduced image noise and beam-hardening artifacts when compared with HIR ([image noise, MBIR 3.4 ± 0.7; HIR 2.1 ± 0.8, p < 0.001], [beam-hardening artifacts, MBIR 3.8 ± 0.4; HIR 2.6 ± 1.0, p < 0.001]).Conclusions: MBIR with a beam-hardening model effectively reduced image noise and beam-hardening artifacts and improved myocardial ECV quantification when compared with HIR using MRI as a reference standard.Key Points: • MBIR with a beam-hardening model effectively reduced image noise and beam-hardening artifacts. • The mean absolute difference between the global mid-ventricular ECV derived from CT and MRI for MBIR was significantly smaller than that for conventional HIR. • MBIR provided more accurate myocardial CT number and improved ECV quantification when compared with HIR. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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