This study sought to investigate the usefulness of in vivo T1 mapping in quantitative classification of compositions and vulnerability of carotid artery atherosclerotic plaques. We found that it is feasible to quantify the T1 values of atherosclerotic plaque compositions in carotid artery with in vivo T1 mapping. Significant differences in T1 values between fibrous tissue and other plaque compositions indicate that it is possible to classify plaque compositional features using T1 mapping. In addition, our findings of IPH and LRNC with significant different T1 values from other plaque compositions suggest the potential of T1 mapping in classification of plaque vulnerability.
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