Comparison of liver T1 relaxation times without and with iron correction in pediatric autoimmune liver disease.
Background: Magnetic resonance imaging (MRI) T1 relaxometry (mapping) has been reported as a quantitative biomarker of liver injury due to inflammation and fibrosis.Objective: To assess the relationship between liver MRI T1 relaxometry measurements obtained using a modified Look-Locker inversion rec...
| Publicado en: | Pediatric Radiology Vol. 50; no. 7; pp. 935 - 943 |
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| Autores principales: | , , , , , |
| Formato: | research Journal Article |
| Publicado: |
Springer Nature
Jun2020
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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=143700319&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 143700319 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 03010449 O03 jtl: Pediatric Radiology issn: 03010449 maglogo: N pubinfo: dt: Jun2020 vid: 50 iid: 7 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 143700319 143700319 NLM32409910 143700319 10.1007/s00247-020-04663-8 NLM32409910 143700319 ppf: 935 ppct: 8 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: Comparison of liver T1 relaxation times without and with iron correction in pediatric autoimmune liver disease. aug: au: Dillman, Jonathan R. Serai, Suraj D. Miethke, Alexander G. Singh, Ruchi Tkach, Jean A. Trout, Andrew T. affil: Department of Radiology, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave., 45229, Cincinnati, OH, USA sug: subj: Autoimmune Diseases Liver Diseases Immunology Liver Diseases Female Cross Sectional Studies Human Male Image Interpretation, Computer Assisted Adolescence Magnetic Resonance Imaging Methods Comparative Studies Multicenter Studies Evaluation Research Validation Studies Adolescent: 13-18 years Female Male ab: Background: Magnetic resonance imaging (MRI) T1 relaxometry (mapping) has been reported as a quantitative biomarker of liver injury due to inflammation and fibrosis.Objective: To assess the relationship between liver MRI T1 relaxometry measurements obtained using a modified Look-Locker inversion recovery (MOLLI) pulse sequence without and with iron (T2*) correction (cT1) in pediatric autoimmune liver disease.Materials and Methods: This cross-sectional study was institutional review board-approved, with informed consent obtained. MRI was acquired at 1.5 T in patients participating in an autoimmune liver disease registry. T1 relaxometry was performed using a MOLLI sequence with a 5(3)3-s acquisition strategy. A multi-echo gradient echo sequence was used to measure liver T2*. Non-iron-corrected native T1 (ms), calculated as the mean of four slices through the mid-liver, was measured using T1 parametric maps generated off-line. A proprietary T2* correction (Perspectum Diagnostics, Oxford, UK), blinded to native T1 values, calculated cT1 values. The relationship between native T1 and cT1 measurements was assessed using Spearman rank correlation and Bland-Altman analyses.Results: Forty-eight patients with a mean (standard deviation [SD]) age of 15.2 (4.1) years were included. Mean (SD) liver native T1 was 651.2 (123.9) ms and mean (SD) cT1 was 919.5 (86.8) ms, with excellent positive correlation between values (r=0.91 [95% confidence interval (CI): 0.85-0.95]; P<0.0001). Mean bias between native T1 and cT1 measurements was 268.3 ms (95% limits of agreement: 131.9-404.7 ms).Conclusion: There is excellent positive correlation between liver native T1 and cT1 measurements in pediatric patients with autoimmune liver disease. This relationship brings into question the need to perform T1 iron correction in this patient population. T1 and cT1 measurements are not interchangeable, however, due to considerable systematic bias with cT1 values being considerably higher. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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