دورية أكاديمية
أعرض في EDS

Bias, Repeatability and Reproducibility of Liver T 1 Mapping With Variable Flip Angles.

التفاصيل البيبلوغرافية
العنوان: Bias, Repeatability and Reproducibility of Liver T 1 Mapping With Variable Flip Angles.
المؤلفون: Tadimalla S; Institute of Medical Physics, University of Sydney, Sydney, Australia.; Department of Biomedical Imaging Sciences, University of Leeds, Leeds, UK., Wilson DJ; Leeds Teaching Hospitals Trust, Leeds, UK., Shelley D; Leeds Teaching Hospitals Trust, Leeds, UK., Bainbridge G; Leeds Teaching Hospitals Trust, Leeds, UK., Saysell M; Leeds Teaching Hospitals Trust, Leeds, UK., Mendichovszky IA; Department of Radiology, University of Cambridge, Cambridge, UK., Graves MJ; Department of Radiology, University of Cambridge, Cambridge, UK., Guthrie JA; Leeds Teaching Hospitals Trust, Leeds, UK., Waterton JC; Bioxydyn Ltd, Manchester, UK.; Centre for Imaging Sciences, Division of Informatics Imaging and Data Sciences, School of Health Sciences, Faculty of Biology Medicine and Health, University of Manchester, Manchester Academic Health Sciences Centre, Manchester, UK., Parker GJM; Bioxydyn Ltd, Manchester, UK.; Centre for Medical Image Computing, Department of Medical Physics and Biomedical Engineering, University College London, London, UK., Sourbron SP; Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, UK.
المصدر: Journal of magnetic resonance imaging : JMRI [J Magn Reson Imaging] 2022 Oct; Vol. 56 (4), pp. 1042-1052. Date of Electronic Publication: 2022 Feb 27.
نوع المنشور: Journal Article; Observational Study; Research Support, Non-U.S. Gov't
اللغة: English
بيانات الدورية: Publisher: Wiley-Liss Country of Publication: United States NLM ID: 9105850 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1522-2586 (Electronic) Linking ISSN: 10531807 NLM ISO Abbreviation: J Magn Reson Imaging Subsets: MEDLINE
أسماء مطبوعة: Publication: <2005-> : Hoboken , N.J. : Wiley-Liss
Original Publication: Chicago, IL : Society for Magnetic Resonance Imaging, c1991-
مواضيع طبية MeSH: Brain*/diagnostic imaging , Magnetic Resonance Imaging*/methods, Female ; Humans ; Liver/diagnostic imaging ; Male ; Phantoms, Imaging ; Prostate ; Reproducibility of Results
مستخلص: Background: Three-dimensional variable flip angle (VFA) methods are commonly used for T 1 mapping of the liver, but there is no data on the accuracy, repeatability, and reproducibility of this technique in this organ in a multivendor setting.
Purpose: To measure bias, repeatability, and reproducibility of VFA T 1 mapping in the liver.
Study Type: Prospective observational.
Population: Eight healthy volunteers, four women, with no known liver disease.
Field Strength/sequence: 1.5-T and 3.0-T; three-dimensional steady-state spoiled gradient echo with VFAs; Look-Locker.
Assessment: Traveling volunteers were scanned twice each (30 minutes to 3 months apart) on six MRI scanners from three vendors (GE Healthcare, Philips Medical Systems, and Siemens Healthineers) at two field strengths. The maximum period between the first and last scans among all volunteers was 9 months. Volunteers were instructed to abstain from alcohol intake for at least 72 hours prior to each scan and avoid high cholesterol foods on the day of the scan.
Statistical Tests: Repeated measures ANOVA, Student t-test, Levene's test of variances, and 95% significance level. The percent error relative to literature liver T 1 in healthy volunteers was used to assess bias. The relative error (RE) due to intrascanner and interscanner variation in T 1 measurements was used to assess repeatability and reproducibility.
Results: The 95% confidence interval (CI) on the mean bias and mean repeatability RE of VFA T 1 in the healthy liver was 34 ± 6% and 10 ± 3%, respectively. The 95% CI on the mean reproducibility RE at 1.5 T and 3.0 T was 29 ± 7% and 25 ± 4%, respectively.
Data Conclusion: Bias, repeatability, and reproducibility of VFA T 1 mapping in the liver in a multivendor setting are similar to those reported for breast, prostate, and brain.
Level of Evidence: 1 TECHNICAL EFFICACY STAGE: 1.
(© 2022 The Authors. Journal of Magnetic Resonance Imaging published by Wiley Periodicals LLC on behalf of International Society for Magnetic Resonance in Medicine.)
التعليقات: Comment in: J Magn Reson Imaging. 2022 Oct;56(4):"1053-1054". (PMID: 35229392)
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معلومات مُعتمدة: MR/P023398/1 United Kingdom MRC_ Medical Research Council; MR/P023398/2 United Kingdom MRC_ Medical Research Council
فهرسة مساهمة: Keywords: T1 mapping; VFA; bias; liver; precision; repeatability; reproducibility
تواريخ الأحداث: Date Created: 20220228 Date Completed: 20220916 Latest Revision: 20221222
رمز التحديث: 20221222
مُعرف محوري في PubMed: PMC9545852
DOI: 10.1002/jmri.28127
PMID: 35224803
قاعدة البيانات: MEDLINE
الوصف
تدمد:1522-2586
DOI:10.1002/jmri.28127