Cargando…
Variability and homogeneity of cardiovascular magnetic resonance myocardial T2-mapping in volunteers compared to patients with edema
BACKGROUND: The aim of the study was to test the reproducibility and variability of myocardial T2 mapping in relation to sequence type and spatial orientation in a large group of healthy volunteers. For control T2 mapping was also applied in patients with true edema. Cardiovascular magnetic resonanc...
Autores principales: | , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
BioMed Central
2013
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3627620/ https://www.ncbi.nlm.nih.gov/pubmed/23537111 http://dx.doi.org/10.1186/1532-429X-15-27 |
_version_ | 1782266331201011712 |
---|---|
author | Wassmuth, Ralf Prothmann, Marcel Utz, Wolfgang Dieringer, Matthias von Knobelsdorff-Brenkenhoff, Florian Greiser, Andreas Schulz-Menger, Jeanette |
author_facet | Wassmuth, Ralf Prothmann, Marcel Utz, Wolfgang Dieringer, Matthias von Knobelsdorff-Brenkenhoff, Florian Greiser, Andreas Schulz-Menger, Jeanette |
author_sort | Wassmuth, Ralf |
collection | PubMed |
description | BACKGROUND: The aim of the study was to test the reproducibility and variability of myocardial T2 mapping in relation to sequence type and spatial orientation in a large group of healthy volunteers. For control T2 mapping was also applied in patients with true edema. Cardiovascular magnetic resonance (CMR) T2-mapping has potential for the detection and quantification of myocardial edema. Clinical experience is limited so far. The variability and potential pitfalls in broad application are unknown. METHODS: Healthy volunteers (n = 73, 35 ± 13 years) and patients with edema (n = 28, 55 ± 17 years) underwent CMR at 1.5 T. Steady state free precession (SSFP) cine loops and T2-weighted spin echo images were obtained. In patients, additionally late gadolinium enhancement images were acquired. We obtained T2 maps in midventricular short axis (SAX) and four-chamber view (4CV) based on images with T2 preparation times of 0, 24, 55 ms and compared fast low angle shot (FLASH) and SSFP readout. 10 volunteers were scanned twice on separate days. Two observers analysed segmental and global T2 per slice. RESULTS: In volunteers global myocardial T2 systematically differed depending on image orientation and sequence (FLASH 52 ± 5 vs. SSFP 55 ± 5 ms in SAX and 57 ± 6 vs. 59 ± 6 ms in 4CV; p < 0.0001 for both). Anteroseptal and apical segments had higher T2 than inferior and basal segments (SAX: 59 ± 6 vs. 48 ± 5 ms for FLASH and 59 ± 7 vs. 52 ± 4 ms for SSFP; p < 0.0001 for both). 14 volunteers had segments with T2 ≥ 70 ms. Mean intraobserver variability was 1.07 ± 1.03 ms (r = 0.94); interobserver variability was 1.6 ± 1.5 ms (r = 0.87). The coefficient of variation for repeated scans was 7.6% for SAX and 6.6% for 4CV. Mapping revealed focally increased T2 (73 ± 9 vs. 51 ± 3 ms in remote myocardium; p < 0.0001) in all patients with edema. CONCLUSIONS: Myocardial T2 mapping is technically feasible and highly reproducible. It can detect focal edema und differentiate it from normal myocardium. Increased T2 was found in some volunteers most likely due to partial volume and residual motion. |
format | Online Article Text |
id | pubmed-3627620 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-36276202013-04-18 Variability and homogeneity of cardiovascular magnetic resonance myocardial T2-mapping in volunteers compared to patients with edema Wassmuth, Ralf Prothmann, Marcel Utz, Wolfgang Dieringer, Matthias von Knobelsdorff-Brenkenhoff, Florian Greiser, Andreas Schulz-Menger, Jeanette J Cardiovasc Magn Reson Research BACKGROUND: The aim of the study was to test the reproducibility and variability of myocardial T2 mapping in relation to sequence type and spatial orientation in a large group of healthy volunteers. For control T2 mapping was also applied in patients with true edema. Cardiovascular magnetic resonance (CMR) T2-mapping has potential for the detection and quantification of myocardial edema. Clinical experience is limited so far. The variability and potential pitfalls in broad application are unknown. METHODS: Healthy volunteers (n = 73, 35 ± 13 years) and patients with edema (n = 28, 55 ± 17 years) underwent CMR at 1.5 T. Steady state free precession (SSFP) cine loops and T2-weighted spin echo images were obtained. In patients, additionally late gadolinium enhancement images were acquired. We obtained T2 maps in midventricular short axis (SAX) and four-chamber view (4CV) based on images with T2 preparation times of 0, 24, 55 ms and compared fast low angle shot (FLASH) and SSFP readout. 10 volunteers were scanned twice on separate days. Two observers analysed segmental and global T2 per slice. RESULTS: In volunteers global myocardial T2 systematically differed depending on image orientation and sequence (FLASH 52 ± 5 vs. SSFP 55 ± 5 ms in SAX and 57 ± 6 vs. 59 ± 6 ms in 4CV; p < 0.0001 for both). Anteroseptal and apical segments had higher T2 than inferior and basal segments (SAX: 59 ± 6 vs. 48 ± 5 ms for FLASH and 59 ± 7 vs. 52 ± 4 ms for SSFP; p < 0.0001 for both). 14 volunteers had segments with T2 ≥ 70 ms. Mean intraobserver variability was 1.07 ± 1.03 ms (r = 0.94); interobserver variability was 1.6 ± 1.5 ms (r = 0.87). The coefficient of variation for repeated scans was 7.6% for SAX and 6.6% for 4CV. Mapping revealed focally increased T2 (73 ± 9 vs. 51 ± 3 ms in remote myocardium; p < 0.0001) in all patients with edema. CONCLUSIONS: Myocardial T2 mapping is technically feasible and highly reproducible. It can detect focal edema und differentiate it from normal myocardium. Increased T2 was found in some volunteers most likely due to partial volume and residual motion. BioMed Central 2013-03-27 /pmc/articles/PMC3627620/ /pubmed/23537111 http://dx.doi.org/10.1186/1532-429X-15-27 Text en Copyright © 2013 Wassmuth et al.; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Wassmuth, Ralf Prothmann, Marcel Utz, Wolfgang Dieringer, Matthias von Knobelsdorff-Brenkenhoff, Florian Greiser, Andreas Schulz-Menger, Jeanette Variability and homogeneity of cardiovascular magnetic resonance myocardial T2-mapping in volunteers compared to patients with edema |
title | Variability and homogeneity of cardiovascular magnetic resonance myocardial T2-mapping in volunteers compared to patients with edema |
title_full | Variability and homogeneity of cardiovascular magnetic resonance myocardial T2-mapping in volunteers compared to patients with edema |
title_fullStr | Variability and homogeneity of cardiovascular magnetic resonance myocardial T2-mapping in volunteers compared to patients with edema |
title_full_unstemmed | Variability and homogeneity of cardiovascular magnetic resonance myocardial T2-mapping in volunteers compared to patients with edema |
title_short | Variability and homogeneity of cardiovascular magnetic resonance myocardial T2-mapping in volunteers compared to patients with edema |
title_sort | variability and homogeneity of cardiovascular magnetic resonance myocardial t2-mapping in volunteers compared to patients with edema |
topic | Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3627620/ https://www.ncbi.nlm.nih.gov/pubmed/23537111 http://dx.doi.org/10.1186/1532-429X-15-27 |
work_keys_str_mv | AT wassmuthralf variabilityandhomogeneityofcardiovascularmagneticresonancemyocardialt2mappinginvolunteerscomparedtopatientswithedema AT prothmannmarcel variabilityandhomogeneityofcardiovascularmagneticresonancemyocardialt2mappinginvolunteerscomparedtopatientswithedema AT utzwolfgang variabilityandhomogeneityofcardiovascularmagneticresonancemyocardialt2mappinginvolunteerscomparedtopatientswithedema AT dieringermatthias variabilityandhomogeneityofcardiovascularmagneticresonancemyocardialt2mappinginvolunteerscomparedtopatientswithedema AT vonknobelsdorffbrenkenhoffflorian variabilityandhomogeneityofcardiovascularmagneticresonancemyocardialt2mappinginvolunteerscomparedtopatientswithedema AT greiserandreas variabilityandhomogeneityofcardiovascularmagneticresonancemyocardialt2mappinginvolunteerscomparedtopatientswithedema AT schulzmengerjeanette variabilityandhomogeneityofcardiovascularmagneticresonancemyocardialt2mappinginvolunteerscomparedtopatientswithedema |