Native T1 Mapping by 3-T CMR Imaging for Characterization of Chronic Myocardial Infarctions

Avinash Kali, Eui Young Choi, Behzad Sharif, Young Jin Kim, Xiaoming Bi, Bruce Spottiswoode, Ivan Cokic, Hsin Jung Yang, Mourad Tighiouart, Antonio Hernandez Conte, Debiao Li, Daniel S. Berman, Byoung Wook Choi, Hyuk Jae Chang, Rohan Dharmakumar

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

Objectives The purpose of this study was to investigate whether native T1 maps at 3-T can reliably characterize chronic myocardial infarctions (MIs) in patients with prior ST-segment elevation myocardial infarction (STEMI) or non-ST-segment elevation myocardial infarction (NSTEMI). Background Late gadolinium enhancement (LGE) cardiac magnetic resonance is the gold standard for characterizing chronic MIs, but it is contraindicated in patients with end-stage chronic kidney disease. Methods Native T1 and LGE images were acquired at 3-T in patients with prior STEMI (n = 13) and NSTEMI (n = 12) at a median of 13.6 years post-MI. Infarct location, size, and transmurality were measured using mean ± 5 SDs thresholding criterion from LGE images and T1 maps and compared against one another. Independent reviewers assessed visual conspicuity of MIs on LGE images and T1 maps. Results Native T1 maps and LGE images were not different for measuring infarct size (STEMI: p = 0.46; NSTEMI: p = 0.27) and transmurality (STEMI: p = 0.13; NSTEMI: p = 0.21) using thresholding criterion. Using thresholding criterion, good agreement was observed between LGE images and T1 maps for measuring infarct size (STEMI: bias = 0.6 ± 3.1%; R2 = 0.93; NSTEMI: bias = -0.4 ± 4.4%; R2 = 0.85) and transmurality (STEMI: bias = 2.0 ± 4.2%; R2 = 0.89; NSTEMI: bias = -2.7 ± 7.9%; R2 = 0.68). Sensitivity and specificity of T1 maps for detecting chronic MIs based on thresholding criterion were 89% and 98%, respectively (STEMI), and 87% and 95%, respectively (NSTEMI). Relative to LGE images, the mean visual conspicuity score for detecting chronic MIs was significantly lower for T1 maps (p < 0.001 for both cases). Median infarct-to-remote myocardium contrast-to-noise ratio was 2.5-fold higher for LGE images relative to T1 maps (p < 0.001). Sensitivity and specificity of T1 maps for visual detection were 60% and 86%, respectively (STEMI), and 64% and 91% (NSTEMI), respectively. Conclusions Chronic MIs in STEMI and NSTEMI patients can be reliably characterized using threshold-based detection on native T1 maps at 3-T. Visual detection of chronic MIs on native T1 maps in both patient populations has high specificity, but modest sensitivity.

Original languageEnglish
Pages (from-to)1019-1030
Number of pages12
JournalJACC: Cardiovascular Imaging
Volume8
Issue number9
DOIs
Publication statusPublished - 2015 Sep 1

All Science Journal Classification (ASJC) codes

  • Radiology Nuclear Medicine and imaging
  • Cardiology and Cardiovascular Medicine

Fingerprint Dive into the research topics of 'Native T<sub>1</sub> Mapping by 3-T CMR Imaging for Characterization of Chronic Myocardial Infarctions'. Together they form a unique fingerprint.

  • Cite this

    Kali, A., Choi, E. Y., Sharif, B., Kim, Y. J., Bi, X., Spottiswoode, B., Cokic, I., Yang, H. J., Tighiouart, M., Conte, A. H., Li, D., Berman, D. S., Choi, B. W., Chang, H. J., & Dharmakumar, R. (2015). Native T1 Mapping by 3-T CMR Imaging for Characterization of Chronic Myocardial Infarctions. JACC: Cardiovascular Imaging, 8(9), 1019-1030. https://doi.org/10.1016/j.jcmg.2015.04.018