CMR T1 mapping has been developed as a noninvasive technique to estimate ECV; however, the diagnostic and prognostic impacts of this technique have not been well established. Eur Heart J Cardiovasc Imaging. diffuse fibrosis not detectable by LGE), there is an overlap between different cardiomyopathies and some overlap with normal T1 values. J Cardiovasc Magn Reson. © 2020 BioMed Central Ltd unless otherwise stated. 2012;33:1268–78.de Bakker JM, van Capelle FJ, Janse MJ, Wilde AA, Coronel R, Becker AE, Dingemans KP, van Hemel NM, Hauer RN. 2014;7:157–65.Patel KS, Hawkins PN.
For the purpose of comparability, only studies using 1.5 T scanners were considered in this figure. Patients with poor renal function (or on dialysis) precluding gadolinium-based contrast injection may benefit from using native T1 mapping instead of LGE imaging. 2003;108:54–9.aus dem Siepen F, Buss SJ, Messroghli D, Andre F, Lossnitzer D, Seitz S, Keller M, Schnabel PA, Giannitsis E, Korosoglou G, Katus HA, Steen H. T1 mapping in dilated cardiomyopathy with cardiac magnetic resonance: quantification of diffuse myocardial fibrosis and comparison with endomyocardial biopsy.
When done without contrast it is commonly referred to as "native" T1-mapping. According to data from the OPTIMIZE-HF registry preserved ejection fraction was present in a large proportion of patients with heart failure. Today, T1 mapping in particular offers the prospect of a new era of tissue characterization by CMR with quantitative data on continuous scales and low observer variability. Circulation. 2013;6:637–45.Gujja P, Rosing DR, Tripodi DJ, Shizukuda Y. 2015;278:126–44.Dungu JN, Valencia O, Pinney JH, Gibbs SD, Rowczenio D, Gilbertson JA, Lachmann HJ, Wechalekar A, Gillmore JD, Whelan CJ, Hawkins PN, Anderson LJ. ScienceDirect ® is a registered trademark of Elsevier B.V. Magn Reson Med. In some instances, these processes can even cancel each other out (e.g. JACC Cardiovasc Imaging. The techniques have advanced to where pixel-level myocardial T1 mapping has become a routine component of CMR examinations. 1970;41:250–1.Messroghli DR, Radjenovic A, Kozerke S, Higgins DM, Sivananthan MU, Ridgway JP. PH drafted the manuscript.
2010;12:69.Chow K, Flewitt JA, Green JD, Pagano JJ, Friedrich MG, Thompson RB.
On T2* magnetic resonance and cardiac iron. PG, DM, DB, JG and SP reviewed the manuscript. Since collagen deposition is often diffuse, LGE usually shows no regional fibrosis/scarring. Magn Reson Med. Although the distinction of acute vs. chronic MI can be challenging, T1 values in acute MI are generally higher than in chronic MI and thus may allow distinction of an acute coronary … T1 mapping is a cardiac magnetic resonance (CMR) imaging technique, which shows early clinical promise particularly in the setting of diffuse fibrosis. J Cardiovasc Magn Reson. 2009;54:220–8.Puntmann VO, Voigt T, Chen Z, Mayr M, Karim R, Rhode K, Pastor A, Carr-White G, Razavi R, Schaeffter T, Nagel E. Native T1 Mapping in Differentiation of Normal Myocardium From Diffuse Disease in Hypertrophic and Dilated Cardiomyopathy. CMR parametric mapping of T1, T2, T2* and extracellular volume: A consensus statement. Methods A total of 473 consecutive patients referred for CMR (49.5% female, age 57.8 ± 17.1 years) without hypertrophic cardiomyopathy, cardiac amyloidosis, or Anderson-Fabry disease were studied. Combined with the use of contrast agents, T1 mapping has led an expansive investigation of interstitial remodeling in ischemic and nonischemic heart disease.
As such, T1 mapping has the potential to detect diffuse myocardial structural alterations not assessable by other non-invasive means, including LGE.Currently used T1 mapping methods acquire a set of non-segmented raw images within separate cardiac cycles of a single breath-hold. Elevations and reductions of T1 and ECV are not specific and can be caused by various disease processes.
Absolute values for native T1 depend greatly on field strength (1.5 T or 3 T), pulse sequence (MOLLI or ShMOLLI), scanner manufacturer and rules of measurements. 2016;67:2189–90.Todiere G, Aquaro GD, Piaggi P, Formisano F, Barison A, Masci PG, Strata E, Bacigalupo L, Marzilli M, Pingitore A, Lombardi M. Progression of myocardial fibrosis assessed with cardiac magnetic resonance in hypertrophic cardiomyopathy. Figure adapted from Martin Ugander (SCMR 2014)Unlike native T1 relaxation times, contrast-enhanced T1 values are more variable and dependent on contrast agent dosing, the time elapsed between contrast agent administration and T1 measurement and renal clearance. T1, T2, and extracellular volume (ECV) maps were generated using an OsiriX plug-in. In clinical practice, clinical history, laboratory analyses and imaging findings are therefore generally used to diagnose acute myocarditis. On ECV-maps, LV or biventricular dilatation and systolic dysfunction without an obvious or detectable cause are the defining characteristics of dilated (nonischaemic) cardiomyopathy (DCM).
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