PMID- 32725975 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20210310 IS - 1738-5520 (Print) IS - 1738-5555 (Electronic) IS - 1738-5520 (Linking) VI - 50 IP - 8 DP - 2020 Aug TI - CMR Parametric Mapping as a Tool for Myocardial Tissue Characterization. PG - 658-676 LID - 10.4070/kcj.2020.0157 [doi] AB - Cardiovascular magnetic resonance (CMR) is the current gold standard for imaging cardiac anatomy, function, and advanced myocardial tissue characterization. After cine, late gadolinium enhancement (LGE), and perfusion imaging, parametric mapping is widely regarded as the 4th era of myocardial CMR development. In contrast to conventional CMR tissue characterization techniques, which rely on relative variations in image intensities to highlight abnormal tissues, parametric mapping provides direct visualization of tissue MR properties such as T1, T2 and T2* in absolute denominations (e.g. in milliseconds). Presentation as pixel-wise parametric maps adds spatial information for a more complete assessment of the myocardium. Advantages of parametric mapping include direct, quantitative comparisons inter- and within-individuals, as well as detection of diffuse disease not evident on conventional CMR imaging, without the need for contrast agents. CMR parametric mapping methods have matured over the past decade into clinical tools, demonstrating not only clinical utility but added value in a wide range of cardiac diseases. They are particularly useful for the evaluation of acute myocardial injury, suspected infiltration and heart failure of unclear etiology. This review discusses the background of parametric mapping, particularly T1-, T2- and ECV-mapping, general magnetic resonance physics principles, clinical applications (including imaging protocols, image analysis and reporting guidelines), current challenges and future directions. CMR parametric mapping is increasingly available on routine clinical scanners, and promises to deliver advanced myocardial tissue characterization beyond conventional CMR techniques, ultimately helping clinicians to benefit patients in their clinical management. CI - Copyright (c) 2020. The Korean Society of Cardiology. FAU - Ferreira, Vanessa M AU - Ferreira VM AUID- ORCID: 0000-0002-0046-7634 AD - Oxford Centre for Clinical Magnetic Resonance Research, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom. vanessa.ferreira@cardiov.ox.ac.uk. FAU - Piechnik, Stefan K AU - Piechnik SK AUID- ORCID: 0000-0002-0268-5221 AD - Oxford Centre for Clinical Magnetic Resonance Research, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom. LA - eng GR - PG/15/71/31731/BHF_/British Heart Foundation/United Kingdom GR - British Heart Foundation Centre of Research Excellence/United Kingdom GR - National Institute of Health Research (NIHR) Biomedical Research Centre/United Kingdom PT - Journal Article PT - Review PL - Korea (South) TA - Korean Circ J JT - Korean circulation journal JID - 101247141 PMC - PMC7390720 OTO - NOTNLM OT - Cardiovascular magnetic resonance OT - Myocardial tissue characterization OT - Parametric mapping OT - T1-mapping OT - T2-mapping COIS- Drs. Ferreira and Piechnik acknowledge support from the National Institute of Health Research (NIHR) Biomedical Research Centre, Oxford, and the British Heart Foundation Centre of Research Excellence, Oxford. Dr. Ferreira is funded by the British Heart Foundation. Dr. Piechnik has patent authorship rights for U.S. patent 9285446 B2 (systems and methods for shortened modified Look-Locker inversion recovery [ShMOLLI] cardiac gated mapping of T1), granted March 15, 2016; all rights transferred to Siemens Medical. Patents pending: Zhang; Piechnik; Ferreira et al. "A method for identity validation and quality assurance of quantitative magnetic resonance imaging protocols". (Oxford University Innovation project #16435); Hann; Piechnik; Ferreira et al. "Method and Apparatus for Quality Prediction" (Oxford University Innovation project #16045). EDAT- 2020/07/30 06:00 MHDA- 2020/07/30 06:01 PMCR- 2020/08/01 CRDT- 2020/07/30 06:00 PHST- 2020/04/15 00:00 [received] PHST- 2020/04/23 00:00 [accepted] PHST- 2020/07/30 06:00 [entrez] PHST- 2020/07/30 06:00 [pubmed] PHST- 2020/07/30 06:01 [medline] PHST- 2020/08/01 00:00 [pmc-release] AID - 50.658 [pii] AID - 10.4070/kcj.2020.0157 [doi] PST - ppublish SO - Korean Circ J. 2020 Aug;50(8):658-676. doi: 10.4070/kcj.2020.0157.